# LeetCode [English Version](/solution/README_EN.md) ## 题解 列表所有题解均由 [开源社区 Doocs](https://github.com/doocs) 贡献者提供，正在完善中，欢迎贡献你的题解！ 快速搜索题号、题解、标签等，请善用 <kbd>Control</kbd>+<kbd>F</kbd>（或者 <kbd>Command</kbd>+<kbd>F</kbd>）。 | 题号 | 题解 | 标签 | 难度 | 备注 | | ------------------------------------------------------------------------------------------------------------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------- | ---- | ---- | | [0001](https://leetcode-cn.com/problems/two-sum) | [两数之和](/solution/0000-0099/0001.Two%20Sum/README.md) | `数组`,`哈希表` | 简单 | | | [0002](https://leetcode-cn.com/problems/add-two-numbers) | [两数相加](/solution/0000-0099/0002.Add%20Two%20Numbers/README.md) | `递归`,`链表`,`数学` | 中等 | | | [0003](https://leetcode-cn.com/problems/longest-substring-without-repeating-characters) | [无重复字符的最长子串](/solution/0000-0099/0003.Longest%20Substring%20Without%20Repeating%20Characters/README.md) | `哈希表`,`字符串`,`滑动窗口` | 中等 | | | [0004](https://leetcode-cn.com/problems/median-of-two-sorted-arrays) | [寻找两个正序数组的中位数](/solution/0000-0099/0004.Median%20of%20Two%20Sorted%20Arrays/README.md) | `数组`,`二分查找`,`分治` | 困难 | | | [0005](https://leetcode-cn.com/problems/longest-palindromic-substring) | [最长回文子串](/solution/0000-0099/0005.Longest%20Palindromic%20Substring/README.md) | `字符串`,`动态规划` | 中等 | | | [0006](https://leetcode-cn.com/problems/zigzag-conversion) | [Z 字形变换](/solution/0000-0099/0006.Zigzag%20Conversion/README.md) | `字符串` | 中等 | | | [0007](https://leetcode-cn.com/problems/reverse-integer) | [整数反转](/solution/0000-0099/0007.Reverse%20Integer/README.md) | `数学` | 中等 | | | [0008](https://leetcode-cn.com/problems/string-to-integer-atoi) | [字符串转换整数 (atoi)](/solution/0000-0099/0008.String%20to%20Integer%20%28atoi%29/README.md) | `字符串` | 中等 | | | [0009](https://leetcode-cn.com/problems/palindrome-number) | [回文数](/solution/0000-0099/0009.Palindrome%20Number/README.md) | `数学` | 简单 | | | [0010](https://leetcode-cn.com/problems/regular-expression-matching) | [正则表达式匹配](/solution/0000-0099/0010.Regular%20Expression%20Matching/README.md) | `递归`,`字符串`,`动态规划` | 困难 | | | [0011](https://leetcode-cn.com/problems/container-with-most-water) | [盛最多水的容器](/solution/0000-0099/0011.Container%20With%20Most%20Water/README.md) | `贪心`,`数组`,`双指针` | 中等 | | | [0012](https://leetcode-cn.com/problems/integer-to-roman) | [整数转罗马数字](/solution/0000-0099/0012.Integer%20to%20Roman/README.md) | `哈希表`,`数学`,`字符串` | 中等 | | | [0013](https://leetcode-cn.com/problems/roman-to-integer) | [罗马数字转整数](/solution/0000-0099/0013.Roman%20to%20Integer/README.md) | `哈希表`,`数学`,`字符串` | 简单 | | | [0014](https://leetcode-cn.com/problems/longest-common-prefix) | [最长公共前缀](/solution/0000-0099/0014.Longest%20Common%20Prefix/README.md) | `字符串` | 简单 | | | [0015](https://leetcode-cn.com/problems/3sum) | [三数之和](/solution/0000-0099/0015.3Sum/README.md) | `数组`,`双指针`,`排序` | 中等 | | | [0016](https://leetcode-cn.com/problems/3sum-closest) | [最接近的三数之和](/solution/0000-0099/0016.3Sum%20Closest/README.md) | `数组`,`双指针`,`排序` | 中等 | | | [0017](https://leetcode-cn.com/problems/letter-combinations-of-a-phone-number) | [电话号码的字母组合](/solution/0000-0099/0017.Letter%20Combinations%20of%20a%20Phone%20Number/README.md) | `哈希表`,`字符串`,`回溯` | 中等 | | | [0018](https://leetcode-cn.com/problems/4sum) | [四数之和](/solution/0000-0099/0018.4Sum/README.md) | `数组`,`双指针`,`排序` | 中等 | | | [0019](https://leetcode-cn.com/problems/remove-nth-node-from-end-of-list) | [删除链表的倒数第 N 个结点](/solution/0000-0099/0019.Remove%20Nth%20Node%20From%20End%20of%20List/README.md) | `链表`,`双指针` | 中等 | | | [0020](https://leetcode-cn.com/problems/valid-parentheses) | [有效的括号](/solution/0000-0099/0020.Valid%20Parentheses/README.md) | `栈`,`字符串` | 简单 | | | [0021](https://leetcode-cn.com/problems/merge-two-sorted-lists) | [合并两个有序链表](/solution/0000-0099/0021.Merge%20Two%20Sorted%20Lists/README.md) | `递归`,`链表` | 简单 | | | [0022](https://leetcode-cn.com/problems/generate-parentheses) | [括号生成](/solution/0000-0099/0022.Generate%20Parentheses/README.md) | `字符串`,`动态规划`,`回溯` | 中等 | | | [0023](https://leetcode-cn.com/problems/merge-k-sorted-lists) | [合并 K 个升序链表](/solution/0000-0099/0023.Merge%20k%20Sorted%20Lists/README.md) | `链表`,`分治`,`堆（优先队列）`,`归并排序` | 困难 | | | [0024](https://leetcode-cn.com/problems/swap-nodes-in-pairs) | [两两交换链表中的节点](/solution/0000-0099/0024.Swap%20Nodes%20in%20Pairs/README.md) | `递归`,`链表` | 中等 | | | [0025](https://leetcode-cn.com/problems/reverse-nodes-in-k-group) | [K 个一组翻转链表](/solution/0000-0099/0025.Reverse%20Nodes%20in%20k-Group/README.md) | `递归`,`链表` | 困难 | | | [0026](https://leetcode-cn.com/problems/remove-duplicates-from-sorted-array) | [删除有序数组中的重复项](/solution/0000-0099/0026.Remove%20Duplicates%20from%20Sorted%20Array/README.md) | `数组`,`双指针` | 简单 | | | [0027](https://leetcode-cn.com/problems/remove-element) | [移除元素](/solution/0000-0099/0027.Remove%20Element/README.md) | `数组`,`双指针` | 简单 | | | [0028](https://leetcode-cn.com/problems/implement-strstr) | [实现 strStr()](/solution/0000-0099/0028.Implement%20strStr%28%29/README.md) | `双指针`,`字符串`,`字符串匹配` | 简单 | | | [0029](https://leetcode-cn.com/problems/divide-two-integers) | [两数相除](/solution/0000-0099/0029.Divide%20Two%20Integers/README.md) | `位运算`,`数学` | 中等 | | | [0030](https://leetcode-cn.com/problems/substring-with-concatenation-of-all-words) | [串联所有单词的子串](/solution/0000-0099/0030.Substring%20with%20Concatenation%20of%20All%20Words/README.md) | `哈希表`,`字符串`,`滑动窗口` | 困难 | | | [0031](https://leetcode-cn.com/problems/next-permutation) | [下一个排列](/solution/0000-0099/0031.Next%20Permutation/README.md) | `数组`,`双指针` | 中等 | | | [0032](https://leetcode-cn.com/problems/longest-valid-parentheses) | [最长有效括号](/solution/0000-0099/0032.Longest%20Valid%20Parentheses/README.md) | `栈`,`字符串`,`动态规划` | 困难 | | | [0033](https://leetcode-cn.com/problems/search-in-rotated-sorted-array) | [搜索旋转排序数组](/solution/0000-0099/0033.Search%20in%20Rotated%20Sorted%20Array/README.md) | `数组`,`二分查找` | 中等 | | | [0034](https://leetcode-cn.com/problems/find-first-and-last-position-of-element-in-sorted-array) | [在排序数组中查找元素的第一个和最后一个位置](/solution/0000-0099/0034.Find%20First%20and%20Last%20Position%20of%20Element%20in%20Sorted%20Array/README.md) | `数组`,`二分查找` | 中等 | | | [0035](https://leetcode-cn.com/problems/search-insert-position) | [搜索插入位置](/solution/0000-0099/0035.Search%20Insert%20Position/README.md) | `数组`,`二分查找` | 简单 | | | [0036](https://leetcode-cn.com/problems/valid-sudoku) | [有效的数独](/solution/0000-0099/0036.Valid%20Sudoku/README.md) | `数组`,`哈希表`,`矩阵` | 中等 | | | [0037](https://leetcode-cn.com/problems/sudoku-solver) | [解数独](/solution/0000-0099/0037.Sudoku%20Solver/README.md) | `数组`,`回溯`,`矩阵` | 困难 | | | [0038](https://leetcode-cn.com/problems/count-and-say) | [外观数列](/solution/0000-0099/0038.Count%20and%20Say/README.md) | `字符串` | 中等 | | | [0039](https://leetcode-cn.com/problems/combination-sum) | [组合总和](/solution/0000-0099/0039.Combination%20Sum/README.md) | `数组`,`回溯` | 中等 | | | [0041](https://leetcode-cn.com/problems/first-missing-positive) | [缺失的第一个正数](/solution/0000-0099/0041.First%20Missing%20Positive/README.md) | `数组`,`哈希表` | 困难 | | | [0042](https://leetcode-cn.com/problems/trapping-rain-water) | [接雨水](/solution/0000-0099/0042.Trapping%20Rain%20Water/README.md) | `栈`,`数组`,`双指针`,`动态规划`,`单调栈` | 困难 | | | [0043](https://leetcode-cn.com/problems/multiply-strings) | [字符串相乘](/solution/0000-0099/0043.Multiply%20Strings/README.md) | `数学`,`字符串`,`模拟` | 中等 | | | [0044](https://leetcode-cn.com/problems/wildcard-matching) | [通配符匹配](/solution/0000-0099/0044.Wildcard%20Matching/README.md) | `贪心`,`递归`,`字符串`,`动态规划` | 困难 | | | [0045](https://leetcode-cn.com/problems/jump-game-ii) | [跳跃游戏 II](/solution/0000-0099/0045.Jump%20Game%20II/README.md) | `贪心`,`数组`,`动态规划` | 中等 | | | [0046](https://leetcode-cn.com/problems/permutations) | [全排列](/solution/0000-0099/0046.Permutations/README.md) | `数组`,`回溯` | 中等 | | | [0047](https://leetcode-cn.com/problems/permutations-ii) | [全排列 II](/solution/0000-0099/0047.Permutations%20II/README.md) | `数组`,`回溯` | 中等 | | | [0048](https://leetcode-cn.com/problems/rotate-image) | [旋转图像](/solution/0000-0099/0048.Rotate%20Image/README.md) | `数组`,`数学`,`矩阵` | 中等 | | | [0049](https://leetcode-cn.com/problems/group-anagrams) | [字母异位词分组](/solution/0000-0099/0049.Group%20Anagrams/README.md) | `哈希表`,`字符串`,`排序` | 中等 | | | [0050](https://leetcode-cn.com/problems/powx-n) | [Pow(x, n)](/solution/0000-0099/0050.Pow%28x%2C%20n%29/README.md) | `递归`,`数学` | 中等 | | | [0051](https://leetcode-cn.com/problems/n-queens) | [N 皇后](/solution/0000-0099/0051.N-Queens/README.md) | `数组`,`回溯` | 困难 | | | [0052](https://leetcode-cn.com/problems/n-queens-ii) | [N 皇后 II](/solution/0000-0099/0052.N-Queens%20II/README.md) | `回溯` | 困难 | | | [0053](https://leetcode-cn.com/problems/maximum-subarray) | [最大子数组和](/solution/0000-0099/0053.Maximum%20Subarray/README.md) | `数组`,`分治`,`动态规划` | 简单 | | | [0054](https://leetcode-cn.com/problems/spiral-matrix) | [螺旋矩阵](/solution/0000-0099/0054.Spiral%20Matrix/README.md) | `数组`,`矩阵`,`模拟` | 中等 | | | [0055](https://leetcode-cn.com/problems/jump-game) | [跳跃游戏](/solution/0000-0099/0055.Jump%20Game/README.md) | `贪心`,`数组`,`动态规划` | 中等 | | | [0056](https://leetcode-cn.com/problems/merge-intervals) | [合并区间](/solution/0000-0099/0056.Merge%20Intervals/README.md) | `数组`,`排序` | 中等 | | | [0057](https://leetcode-cn.com/problems/insert-interval) | [插入区间](/solution/0000-0099/0057.Insert%20Interval/README.md) | `数组` | 中等 | | | [0058](https://leetcode-cn.com/problems/length-of-last-word) | [最后一个单词的长度](/solution/0000-0099/0058.Length%20of%20Last%20Word/README.md) | `字符串` | 简单 | | | [0059](https://leetcode-cn.com/problems/spiral-matrix-ii) | [螺旋矩阵 II](/solution/0000-0099/0059.Spiral%20Matrix%20II/README.md) | `数组`,`矩阵`,`模拟` | 中等 | | | [0060](https://leetcode-cn.com/problems/permutation-sequence) | [排列序列](/solution/0000-0099/0060.Permutation%20Sequence/README.md) | `递归`,`数学` | 困难 | | | [0061](https://leetcode-cn.com/problems/rotate-list) | [旋转链表](/solution/0000-0099/0061.Rotate%20List/README.md) | `链表`,`双指针` | 中等 | | | [0062](https://leetcode-cn.com/problems/unique-paths) | [不同路径](/solution/0000-0099/0062.Unique%20Paths/README.md) | `数学`,`动态规划`,`组合数学` | 中等 | | | [0063](https://leetcode-cn.com/problems/unique-paths-ii) | [不同路径 II](/solution/0000-0099/0063.Unique%20Paths%20II/README.md) | `数组`,`动态规划`,`矩阵` | 中等 | | | [0064](https://leetcode-cn.com/problems/minimum-path-sum) | [最小路径和](/solution/0000-0099/0064.Minimum%20Path%20Sum/README.md) | `数组`,`动态规划`,`矩阵` | 中等 | | | [0065](https://leetcode-cn.com/problems/valid-number) | [有效数字](/solution/0000-0099/0065.Valid%20Number/README.md) | `字符串` | 困难 | | | [0066](https://leetcode-cn.com/problems/plus-one) | [加一](/solution/0000-0099/0066.Plus%20One/README.md) | `数组`,`数学` | 简单 | | | [0067](https://leetcode-cn.com/problems/add-binary) | [二进制求和](/solution/0000-0099/0067.Add%20Binary/README.md) | `位运算`,`数学`,`字符串`,`模拟` | 简单 | | | [0068](https://leetcode-cn.com/problems/text-justification) | [文本左右对齐](/solution/0000-0099/0068.Text%20Justification/README.md) | `字符串`,`模拟` | 困难 | | | [0069](https://leetcode-cn.com/problems/sqrtx) | [x 的平方根 ](/solution/0000-0099/0069.Sqrt%28x%29/README.md) | `数学`,`二分查找` | 简单 | | | [0070](https://leetcode-cn.com/problems/climbing-stairs) | [爬楼梯](/solution/0000-0099/0070.Climbing%20Stairs/README.md) | `记忆化搜索`,`数学`,`动态规划` | 简单 | | | [0071](https://leetcode-cn.com/problems/simplify-path) | [简化路径](/solution/0000-0099/0071.Simplify%20Path/README.md) | `栈`,`字符串` | 中等 | | | [0072](https://leetcode-cn.com/problems/edit-distance) | [编辑距离](/solution/0000-0099/0072.Edit%20Distance/README.md) | `字符串`,`动态规划` | 困难 | | | [0073](https://leetcode-cn.com/problems/set-matrix-zeroes) | [矩阵置零](/solution/0000-0099/0073.Set%20Matrix%20Zeroes/README.md) | `数组`,`哈希表`,`矩阵` | 中等 | | | [0074](https://leetcode-cn.com/problems/search-a-2d-matrix) | [搜索二维矩阵](/solution/0000-0099/0074.Search%20a%202D%20Matrix/README.md) | `数组`,`二分查找`,`矩阵` | 中等 | | | [0075](https://leetcode-cn.com/problems/sort-colors) | [颜色分类](/solution/0000-0099/0075.Sort%20Colors/README.md) | `数组`,`双指针`,`排序` | 中等 | | | [0076](https://leetcode-cn.com/problems/minimum-window-substring) | [最小覆盖子串](/solution/0000-0099/0076.Minimum%20Window%20Substring/README.md) | `哈希表`,`字符串`,`滑动窗口` | 困难 | | | [0077](https://leetcode-cn.com/problems/combinations) | [组合](/solution/0000-0099/0077.Combinations/README.md) | `数组`,`回溯` | 中等 | | | [0078](https://leetcode-cn.com/problems/subsets) | [子集](/solution/0000-0099/0078.Subsets/README.md) | `位运算`,`数组`,`回溯` | 中等 | | | [0079](https://leetcode-cn.com/problems/word-search) | [单词搜索](/solution/0000-0099/0079.Word%20Search/README.md) | `数组`,`回溯`,`矩阵` | 中等 | | | [0080](https://leetcode-cn.com/problems/remove-duplicates-from-sorted-array-ii) | [删除有序数组中的重复项 II](/solution/0000-0099/0080.Remove%20Duplicates%20from%20Sorted%20Array%20II/README.md) | `数组`,`双指针` | 中等 | | | [0081](https://leetcode-cn.com/problems/search-in-rotated-sorted-array-ii) | [搜索旋转排序数组 II](/solution/0000-0099/0081.Search%20in%20Rotated%20Sorted%20Array%20II/README.md) | `数组`,`二分查找` | 中等 | | | [0082](https://leetcode-cn.com/problems/remove-duplicates-from-sorted-list-ii) | [删除排序链表中的重复元素 II](/solution/0000-0099/0082.Remove%20Duplicates%20from%20Sorted%20List%20II/README.md) | `链表`,`双指针` | 中等 | | | [0083](https://leetcode-cn.com/problems/remove-duplicates-from-sorted-list) | [删除排序链表中的重复元素](/solution/0000-0099/0083.Remove%20Duplicates%20from%20Sorted%20List/README.md) | `链表` | 简单 | | | [0084](https://leetcode-cn.com/problems/largest-rectangle-in-histogram) | [柱状图中最大的矩形](/solution/0000-0099/0084.Largest%20Rectangle%20in%20Histogram/README.md) | `栈`,`数组`,`单调栈` | 困难 | | | [0085](https://leetcode-cn.com/problems/maximal-rectangle) | [最大矩形](/solution/0000-0099/0085.Maximal%20Rectangle/README.md) | `栈`,`数组`,`动态规划`,`矩阵`,`单调栈` | 困难 | | | [0086](https://leetcode-cn.com/problems/partition-list) | [分隔链表](/solution/0000-0099/0086.Partition%20List/README.md) | `链表`,`双指针` | 中等 | | | [0087](https://leetcode-cn.com/problems/scramble-string) | [扰乱字符串](/solution/0000-0099/0087.Scramble%20String/README.md) | `字符串`,`动态规划` | 困难 | | | [0088](https://leetcode-cn.com/problems/merge-sorted-array) | [合并两个有序数组](/solution/0000-0099/0088.Merge%20Sorted%20Array/README.md) | `数组`,`双指针`,`排序` | 简单 | | | [0089](https://leetcode-cn.com/problems/gray-code) | [格雷编码](/solution/0000-0099/0089.Gray%20Code/README.md) | `位运算`,`数学`,`回溯` | 中等 | | | [0090](https://leetcode-cn.com/problems/subsets-ii) | [子集 II](/solution/0000-0099/0090.Subsets%20II/README.md) | `位运算`,`数组`,`回溯` | 中等 | | | [0091](https://leetcode-cn.com/problems/decode-ways) | [解码方法](/solution/0000-0099/0091.Decode%20Ways/README.md) | `字符串`,`动态规划` | 中等 | | | [0092](https://leetcode-cn.com/problems/reverse-linked-list-ii) | [反转链表 II](/solution/0000-0099/0092.Reverse%20Linked%20List%20II/README.md) | `链表` | 中等 | | | [0093](https://leetcode-cn.com/problems/restore-ip-addresses) | [复原 IP 地址](/solution/0000-0099/0093.Restore%20IP%20Addresses/README.md) | `字符串`,`回溯` | 中等 | | | [0094](https://leetcode-cn.com/problems/binary-tree-inorder-traversal) | [二叉树的中序遍历](/solution/0000-0099/0094.Binary%20Tree%20Inorder%20Traversal/README.md) | `栈`,`树`,`深度优先搜索`,`二叉树` | 简单 | | | [0095](https://leetcode-cn.com/problems/unique-binary-search-trees-ii) | [不同的二叉搜索树 II](/solution/0000-0099/0095.Unique%20Binary%20Search%20Trees%20II/README.md) | `树`,`二叉搜索树`,`动态规划`,`回溯`,`二叉树` | 中等 | | | [0096](https://leetcode-cn.com/problems/unique-binary-search-trees) | [不同的二叉搜索树](/solution/0000-0099/0096.Unique%20Binary%20Search%20Trees/README.md) | `树`,`二叉搜索树`,`数学`,`动态规划`,`二叉树` | 中等 | | | [0097](https://leetcode-cn.com/problems/interleaving-string) | [交错字符串](/solution/0000-0099/0097.Interleaving%20String/README.md) | `字符串`,`动态规划` | 中等 | | | [0098](https://leetcode-cn.com/problems/validate-binary-search-tree) | [验证二叉搜索树](/solution/0000-0099/0098.Validate%20Binary%20Search%20Tree/README.md) | `树`,`深度优先搜索`,`二叉搜索树`,`二叉树` | 中等 | | | [0099](https://leetcode-cn.com/problems/recover-binary-search-tree) | [恢复二叉搜索树](/solution/0000-0099/0099.Recover%20Binary%20Search%20Tree/README.md) | `树`,`深度优先搜索`,`二叉搜索树`,`二叉树` | 中等 | | | [0100](https://leetcode-cn.com/problems/same-tree) | [相同的树](/solution/0100-0199/0100.Same%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉树` | 简单 | | | [0101](https://leetcode-cn.com/problems/symmetric-tree) | [对称二叉树](/solution/0100-0199/0101.Symmetric%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉树` | 简单 | | | [0102](https://leetcode-cn.com/problems/binary-tree-level-order-traversal) | [二叉树的层序遍历](/solution/0100-0199/0102.Binary%20Tree%20Level%20Order%20Traversal/README.md) | `树`,`广度优先搜索`,`二叉树` | 中等 | | | [0103](https://leetcode-cn.com/problems/binary-tree-zigzag-level-order-traversal) | [二叉树的锯齿形层序遍历](/solution/0100-0199/0103.Binary%20Tree%20Zigzag%20Level%20Order%20Traversal/README.md) | `树`,`广度优先搜索`,`二叉树` | 中等 | | | [0104](https://leetcode-cn.com/problems/maximum-depth-of-binary-tree) | [二叉树的最大深度](/solution/0100-0199/0104.Maximum%20Depth%20of%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉树` | 简单 | | | [0105](https://leetcode-cn.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal) | [从前序与中序遍历序列构造二叉树](/solution/0100-0199/0105.Construct%20Binary%20Tree%20from%20Preorder%20and%20Inorder%20Traversal/README.md) | `树`,`数组`,`哈希表`,`分治`,`二叉树` | 中等 | | | [0106](https://leetcode-cn.com/problems/construct-binary-tree-from-inorder-and-postorder-traversal) | [从中序与后序遍历序列构造二叉树](/solution/0100-0199/0106.Construct%20Binary%20Tree%20from%20Inorder%20and%20Postorder%20Traversal/README.md) | `树`,`数组`,`哈希表`,`分治`,`二叉树` | 中等 | | | [0107](https://leetcode-cn.com/problems/binary-tree-level-order-traversal-ii) | [二叉树的层序遍历 II](/solution/0100-0199/0107.Binary%20Tree%20Level%20Order%20Traversal%20II/README.md) | `树`,`广度优先搜索`,`二叉树` | 中等 | | | [0108](https://leetcode-cn.com/problems/convert-sorted-array-to-binary-search-tree) | [将有序数组转换为二叉搜索树](/solution/0100-0199/0108.Convert%20Sorted%20Array%20to%20Binary%20Search%20Tree/README.md) | `树`,`二叉搜索树`,`数组`,`分治`,`二叉树` | 简单 | | | [0109](https://leetcode-cn.com/problems/convert-sorted-list-to-binary-search-tree) | [有序链表转换二叉搜索树](/solution/0100-0199/0109.Convert%20Sorted%20List%20to%20Binary%20Search%20Tree/README.md) | `树`,`二叉搜索树`,`链表`,`分治`,`二叉树` | 中等 | | | [0110](https://leetcode-cn.com/problems/balanced-binary-tree) | [平衡二叉树](/solution/0100-0199/0110.Balanced%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`二叉树` | 简单 | | | [0111](https://leetcode-cn.com/problems/minimum-depth-of-binary-tree) | [二叉树的最小深度](/solution/0100-0199/0111.Minimum%20Depth%20of%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉树` | 简单 | | | [0112](https://leetcode-cn.com/problems/path-sum) | [路径总和](/solution/0100-0199/0112.Path%20Sum/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉树` | 简单 | | | [0113](https://leetcode-cn.com/problems/path-sum-ii) | [路径总和 II](/solution/0100-0199/0113.Path%20Sum%20II/README.md) | `树`,`深度优先搜索`,`回溯`,`二叉树` | 中等 | | | [0114](https://leetcode-cn.com/problems/flatten-binary-tree-to-linked-list) | [二叉树展开为链表](/solution/0100-0199/0114.Flatten%20Binary%20Tree%20to%20Linked%20List/README.md) | `栈`,`树`,`深度优先搜索`,`链表`,`二叉树` | 中等 | | | [0115](https://leetcode-cn.com/problems/distinct-subsequences) | [不同的子序列](/solution/0100-0199/0115.Distinct%20Subsequences/README.md) | `字符串`,`动态规划` | 困难 | | | [0116](https://leetcode-cn.com/problems/populating-next-right-pointers-in-each-node) | [填充每个节点的下一个右侧节点指针](/solution/0100-0199/0116.Populating%20Next%20Right%20Pointers%20in%20Each%20Node/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`链表`,`二叉树` | 中等 | | | [0117](https://leetcode-cn.com/problems/populating-next-right-pointers-in-each-node-ii) | [填充每个节点的下一个右侧节点指针 II](/solution/0100-0199/0117.Populating%20Next%20Right%20Pointers%20in%20Each%20Node%20II/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`链表`,`二叉树` | 中等 | | | [0118](https://leetcode-cn.com/problems/pascals-triangle) | [杨辉三角](/solution/0100-0199/0118.Pascal%27s%20Triangle/README.md) | `数组`,`动态规划` | 简单 | | | [0119](https://leetcode-cn.com/problems/pascals-triangle-ii) | [杨辉三角 II](/solution/0100-0199/0119.Pascal%27s%20Triangle%20II/README.md) | `数组`,`动态规划` | 简单 | | | [0120](https://leetcode-cn.com/problems/triangle) | [三角形最小路径和](/solution/0100-0199/0120.Triangle/README.md) | `数组`,`动态规划` | 中等 | | | [0121](https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock) | [买卖股票的最佳时机](/solution/0100-0199/0121.Best%20Time%20to%20Buy%20and%20Sell%20Stock/README.md) | `数组`,`动态规划` | 简单 | | | [0122](https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-ii) | [买卖股票的最佳时机 II](/solution/0100-0199/0122.Best%20Time%20to%20Buy%20and%20Sell%20Stock%20II/README.md) | `贪心`,`数组`,`动态规划` | 中等 | | | [0123](https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-iii) | [买卖股票的最佳时机 III](/solution/0100-0199/0123.Best%20Time%20to%20Buy%20and%20Sell%20Stock%20III/README.md) | `数组`,`动态规划` | 困难 | | | [0124](https://leetcode-cn.com/problems/binary-tree-maximum-path-sum) | [二叉树中的最大路径和](/solution/0100-0199/0124.Binary%20Tree%20Maximum%20Path%20Sum/README.md) | `树`,`深度优先搜索`,`动态规划`,`二叉树` | 困难 | | | [0125](https://leetcode-cn.com/problems/valid-palindrome) | [验证回文串](/solution/0100-0199/0125.Valid%20Palindrome/README.md) | `双指针`,`字符串` | 简单 | | | [0126](https://leetcode-cn.com/problems/word-ladder-ii) | [单词接龙 II](/solution/0100-0199/0126.Word%20Ladder%20II/README.md) | `广度优先搜索`,`哈希表`,`字符串`,`回溯` | 困难 | | | [0127](https://leetcode-cn.com/problems/word-ladder) | [单词接龙](/solution/0100-0199/0127.Word%20Ladder/README.md) | `广度优先搜索`,`哈希表`,`字符串` | 困难 | | | [0128](https://leetcode-cn.com/problems/longest-consecutive-sequence) | [最长连续序列](/solution/0100-0199/0128.Longest%20Consecutive%20Sequence/README.md) | `并查集`,`数组`,`哈希表` | 中等 | | | [0129](https://leetcode-cn.com/problems/sum-root-to-leaf-numbers) | [求根节点到叶节点数字之和](/solution/0100-0199/0129.Sum%20Root%20to%20Leaf%20Numbers/README.md) | `树`,`深度优先搜索`,`二叉树` | 中等 | | | [0131](https://leetcode-cn.com/problems/palindrome-partitioning) | [分割回文串](/solution/0100-0199/0131.Palindrome%20Partitioning/README.md) | `字符串`,`动态规划`,`回溯` | 中等 | | | [0132](https://leetcode-cn.com/problems/palindrome-partitioning-ii) | [分割回文串 II](/solution/0100-0199/0132.Palindrome%20Partitioning%20II/README.md) | `字符串`,`动态规划` | 困难 | | | [0133](https://leetcode-cn.com/problems/clone-graph) | [克隆图](/solution/0100-0199/0133.Clone%20Graph/README.md) | `深度优先搜索`,`广度优先搜索`,`图`,`哈希表` | 中等 | | | [0134](https://leetcode-cn.com/problems/gas-station) | [加油站](/solution/0100-0199/0134.Gas%20Station/README.md) | `贪心`,`数组` | 中等 | | | [0135](https://leetcode-cn.com/problems/candy) | [分发糖果](/solution/0100-0199/0135.Candy/README.md) | `贪心`,`数组` | 困难 | | | [0136](https://leetcode-cn.com/problems/single-number) | [只出现一次的数字](/solution/0100-0199/0136.Single%20Number/README.md) | `位运算`,`数组` | 简单 | | | [0137](https://leetcode-cn.com/problems/single-number-ii) | [只出现一次的数字 II](/solution/0100-0199/0137.Single%20Number%20II/README.md) | `位运算`,`数组` | 中等 | | | [0138](https://leetcode-cn.com/problems/copy-list-with-random-pointer) | [复制带随机指针的链表](/solution/0100-0199/0138.Copy%20List%20with%20Random%20Pointer/README.md) | `哈希表`,`链表` | 中等 | | | [0139](https://leetcode-cn.com/problems/word-break) | [单词拆分](/solution/0100-0199/0139.Word%20Break/README.md) | `字典树`,`记忆化搜索`,`哈希表`,`字符串`,`动态规划` | 中等 | | | [0140](https://leetcode-cn.com/problems/word-break-ii) | [单词拆分 II](/solution/0100-0199/0140.Word%20Break%20II/README.md) | `字典树`,`记忆化搜索`,`哈希表`,`字符串`,`动态规划`,`回溯` | 困难 | | | [0141](https://leetcode-cn.com/problems/linked-list-cycle) | [环形链表](/solution/0100-0199/0141.Linked%20List%20Cycle/README.md) | `哈希表`,`链表`,`双指针` | 简单 | | | [0142](https://leetcode-cn.com/problems/linked-list-cycle-ii) | [环形链表 II](/solution/0100-0199/0142.Linked%20List%20Cycle%20II/README.md) | `哈希表`,`链表`,`双指针` | 中等 | | | [0143](https://leetcode-cn.com/problems/reorder-list) | [重排链表](/solution/0100-0199/0143.Reorder%20List/README.md) | `栈`,`递归`,`链表`,`双指针` | 中等 | | | [0144](https://leetcode-cn.com/problems/binary-tree-preorder-traversal) | [二叉树的前序遍历](/solution/0100-0199/0144.Binary%20Tree%20Preorder%20Traversal/README.md) | `栈`,`树`,`深度优先搜索`,`二叉树` | 简单 | | | [0145](https://leetcode-cn.com/problems/binary-tree-postorder-traversal) | [二叉树的后序遍历](/solution/0100-0199/0145.Binary%20Tree%20Postorder%20Traversal/README.md) | `栈`,`树`,`深度优先搜索`,`二叉树` | 简单 | | | [0146](https://leetcode-cn.com/problems/lru-cache) | [LRU 缓存](/solution/0100-0199/0146.LRU%20Cache/README.md) | `设计`,`哈希表`,`链表`,`双向链表` | 中等 | | | [0147](https://leetcode-cn.com/problems/insertion-sort-list) | [对链表进行插入排序](/solution/0100-0199/0147.Insertion%20Sort%20List/README.md) | `链表`,`排序` | 中等 | | | [0148](https://leetcode-cn.com/problems/sort-list) | [排序链表](/solution/0100-0199/0148.Sort%20List/README.md) | `链表`,`双指针`,`分治`,`排序`,`归并排序` | 中等 | | | [0149](https://leetcode-cn.com/problems/max-points-on-a-line) | [直线上最多的点数](/solution/0100-0199/0149.Max%20Points%20on%20a%20Line/README.md) | `几何`,`数组`,`哈希表`,`数学` | 困难 | | | [0150](https://leetcode-cn.com/problems/evaluate-reverse-polish-notation) | [逆波兰表达式求值](/solution/0100-0199/0150.Evaluate%20Reverse%20Polish%20Notation/README.md) | `栈`,`数组`,`数学` | 中等 | | | [0151](https://leetcode-cn.com/problems/reverse-words-in-a-string) | [颠倒字符串中的单词](/solution/0100-0199/0151.Reverse%20Words%20in%20a%20String/README.md) | `双指针`,`字符串` | 中等 | | | [0152](https://leetcode-cn.com/problems/maximum-product-subarray) | [乘积最大子数组](/solution/0100-0199/0152.Maximum%20Product%20Subarray/README.md) | `数组`,`动态规划` | 中等 | | | [0153](https://leetcode-cn.com/problems/find-minimum-in-rotated-sorted-array) | [寻找旋转排序数组中的最小值](/solution/0100-0199/0153.Find%20Minimum%20in%20Rotated%20Sorted%20Array/README.md) | `数组`,`二分查找` | 中等 | | | [0154](https://leetcode-cn.com/problems/find-minimum-in-rotated-sorted-array-ii) | [寻找旋转排序数组中的最小值 II](/solution/0100-0199/0154.Find%20Minimum%20in%20Rotated%20Sorted%20Array%20II/README.md) | `数组`,`二分查找` | 困难 | | | [0155](https://leetcode-cn.com/problems/min-stack) | [最小栈](/solution/0100-0199/0155.Min%20Stack/README.md) | `栈`,`设计` | 简单 | | | [0156](https://leetcode-cn.com/problems/binary-tree-upside-down) | [上下翻转二叉树](/solution/0100-0199/0156.Binary%20Tree%20Upside%20Down/README.md) | `树`,`深度优先搜索`,`二叉树` | 中等 | 🔒 | | [0157](https://leetcode-cn.com/problems/read-n-characters-given-read4) | [用 Read4 读取 N 个字符](/solution/0100-0199/0157.Read%20N%20Characters%20Given%20Read4/README.md) | `字符串`,`交互`,`模拟` | 简单 | 🔒 | | [0158](https://leetcode-cn.com/problems/read-n-characters-given-read4-ii-call-multiple-times) | [用 Read4 读取 N 个字符 II](/solution/0100-0199/0158.Read%20N%20Characters%20Given%20read4%20II%20-%20Call%20Multiple%20Times/README.md) | `字符串`,`交互`,`模拟` | 困难 | 🔒 | | [0159](https://leetcode-cn.com/problems/longest-substring-with-at-most-two-distinct-characters) | [至多包含两个不同字符的最长子串](/solution/0100-0199/0159.Longest%20Substring%20with%20At%20Most%20Two%20Distinct%20Characters/README.md) | `哈希表`,`字符串`,`滑动窗口` | 中等 | 🔒 | | [0160](https://leetcode-cn.com/problems/intersection-of-two-linked-lists) | [相交链表](/solution/0100-0199/0160.Intersection%20of%20Two%20Linked%20Lists/README.md) | `哈希表`,`链表`,`双指针` | 简单 | | | [0161](https://leetcode-cn.com/problems/one-edit-distance) | [相隔为 1 的编辑距离](/solution/0100-0199/0161.One%20Edit%20Distance/README.md) | `双指针`,`字符串` | 中等 | 🔒 | | [0162](https://leetcode-cn.com/problems/find-peak-element) | [寻找峰值](/solution/0100-0199/0162.Find%20Peak%20Element/README.md) | `数组`,`二分查找` | 中等 | | | [0163](https://leetcode-cn.com/problems/missing-ranges) | [缺失的区间](/solution/0100-0199/0163.Missing%20Ranges/README.md) | `数组` | 简单 | 🔒 | | [0164](https://leetcode-cn.com/problems/maximum-gap) | [最大间距](/solution/0100-0199/0164.Maximum%20Gap/README.md) | `数组`,`桶排序`,`基数排序`,`排序` | 困难 | | | [0165](https://leetcode-cn.com/problems/compare-version-numbers) | [比较版本号](/solution/0100-0199/0165.Compare%20Version%20Numbers/README.md) | `双指针`,`字符串` | 中等 | | | [0166](https://leetcode-cn.com/problems/fraction-to-recurring-decimal) | [分数到小数](/solution/0100-0199/0166.Fraction%20to%20Recurring%20Decimal/README.md) | `哈希表`,`数学`,`字符串` | 中等 | | | [0167](https://leetcode-cn.com/problems/two-sum-ii-input-array-is-sorted) | [两数之和 II - 输入有序数组](/solution/0100-0199/0167.Two%20Sum%20II%20-%20Input%20Array%20Is%20Sorted/README.md) | `数组`,`双指针`,`二分查找` | 中等 | | | [0168](https://leetcode-cn.com/problems/excel-sheet-column-title) | [Excel 表列名称](/solution/0100-0199/0168.Excel%20Sheet%20Column%20Title/README.md) | `数学`,`字符串` | 简单 | | | [0169](https://leetcode-cn.com/problems/majority-element) | [多数元素](/solution/0100-0199/0169.Majority%20Element/README.md) | `数组`,`哈希表`,`分治`,`计数`,`排序` | 简单 | | | [0170](https://leetcode-cn.com/problems/two-sum-iii-data-structure-design) | [两数之和 III - 数据结构设计](/solution/0100-0199/0170.Two%20Sum%20III%20-%20Data%20structure%20design/README.md) | `设计`,`数组`,`哈希表`,`双指针`,`数据流` | 简单 | 🔒 | | [0171](https://leetcode-cn.com/problems/excel-sheet-column-number) | [Excel 表列序号](/solution/0100-0199/0171.Excel%20Sheet%20Column%20Number/README.md) | `数学`,`字符串` | 简单 | | | [0172](https://leetcode-cn.com/problems/factorial-trailing-zeroes) | [阶乘后的零](/solution/0100-0199/0172.Factorial%20Trailing%20Zeroes/README.md) | `数学` | 中等 | | | [0173](https://leetcode-cn.com/problems/binary-search-tree-iterator) | [二叉搜索树迭代器](/solution/0100-0199/0173.Binary%20Search%20Tree%20Iterator/README.md) | `栈`,`树`,`设计`,`二叉搜索树`,`二叉树`,`迭代器` | 中等 | | | [0174](https://leetcode-cn.com/problems/dungeon-game) | [地下城游戏](/solution/0100-0199/0174.Dungeon%20Game/README.md) | `数组`,`动态规划`,`矩阵` | 困难 | | | [0175](https://leetcode-cn.com/problems/combine-two-tables) | [组合两个表](/solution/0100-0199/0175.Combine%20Two%20Tables/README.md) | `数据库` | 简单 | | | [0176](https://leetcode-cn.com/problems/second-highest-salary) | [第二高的薪水](/solution/0100-0199/0176.Second%20Highest%20Salary/README.md) | `数据库` | 中等 | | | [0177](https://leetcode-cn.com/problems/nth-highest-salary) | [第 N 高的薪水](/solution/0100-0199/0177.Nth%20Highest%20Salary/README.md) | `数据库` | 中等 | | | [0178](https://leetcode-cn.com/problems/rank-scores) | [分数排名](/solution/0100-0199/0178.Rank%20Scores/README.md) | `数据库` | 中等 | | | [0179](https://leetcode-cn.com/problems/largest-number) | [最大数](/solution/0100-0199/0179.Largest%20Number/README.md) | `贪心`,`字符串`,`排序` | 中等 | | | [0180](https://leetcode-cn.com/problems/consecutive-numbers) | [连续出现的数字](/solution/0100-0199/0180.Consecutive%20Numbers/README.md) | `数据库` | 中等 | | | [0181](https://leetcode-cn.com/problems/employees-earning-more-than-their-managers) | [超过经理收入的员工](/solution/0100-0199/0181.Employees%20Earning%20More%20Than%20Their%20Managers/README.md) | `数据库` | 简单 | | | [0182](https://leetcode-cn.com/problems/duplicate-emails) | [查找重复的电子邮箱](/solution/0100-0199/0182.Duplicate%20Emails/README.md) | `数据库` | 简单 | | | [0183](https://leetcode-cn.com/problems/customers-who-never-order) | [从不订购的客户](/solution/0100-0199/0183.Customers%20Who%20Never%20Order/README.md) | `数据库` | 简单 | | | [0184](https://leetcode-cn.com/problems/department-highest-salary) | [部门工资最高的员工](/solution/0100-0199/0184.Department%20Highest%20Salary/README.md) | `数据库` | 中等 | | | [0185](https://leetcode-cn.com/problems/department-top-three-salaries) | [部门工资前三高的所有员工](/solution/0100-0199/0185.Department%20Top%20Three%20Salaries/README.md) | `数据库` | 困难 | | | [0186](https://leetcode-cn.com/problems/reverse-words-in-a-string-ii) | [翻转字符串里的单词 II](/solution/0100-0199/0186.Reverse%20Words%20in%20a%20String%20II/README.md) | `双指针`,`字符串` | 中等 | 🔒 | | [0187](https://leetcode-cn.com/problems/repeated-dna-sequences) | [重复的 DNA 序列](/solution/0100-0199/0187.Repeated%20DNA%20Sequences/README.md) | `位运算`,`哈希表`,`字符串`,`滑动窗口`,`哈希函数`,`滚动哈希` | 中等 | | | [0188](https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-iv) | [买卖股票的最佳时机 IV](/solution/0100-0199/0188.Best%20Time%20to%20Buy%20and%20Sell%20Stock%20IV/README.md) | `数组`,`动态规划` | 困难 | | | [0189](https://leetcode-cn.com/problems/rotate-array) | [轮转数组](/solution/0100-0199/0189.Rotate%20Array/README.md) | `数组`,`数学`,`双指针` | 中等 | | | [0190](https://leetcode-cn.com/problems/reverse-bits) | [颠倒二进制位](/solution/0100-0199/0190.Reverse%20Bits/README.md) | `位运算`,`分治` | 简单 | | | [0191](https://leetcode-cn.com/problems/number-of-1-bits) | [位 1 的个数](/solution/0100-0199/0191.Number%20of%201%20Bits/README.md) | `位运算` | 简单 | | | [0192](https://leetcode-cn.com/problems/word-frequency) | [统计词频](/solution/0100-0199/0192.Word%20Frequency/README.md) | | 中等 | | | [0193](https://leetcode-cn.com/problems/valid-phone-numbers) | [有效电话号码](/solution/0100-0199/0193.Valid%20Phone%20Numbers/README.md) | | 简单 | | | [0194](https://leetcode-cn.com/problems/transpose-file) | [转置文件](/solution/0100-0199/0194.Transpose%20File/README.md) | | 中等 | | | [0195](https://leetcode-cn.com/problems/tenth-line) | [第十行](/solution/0100-0199/0195.Tenth%20Line/README.md) | | 简单 | | | [0196](https://leetcode-cn.com/problems/delete-duplicate-emails) | [删除重复的电子邮箱](/solution/0100-0199/0196.Delete%20Duplicate%20Emails/README.md) | `数据库` | 简单 | | | [0197](https://leetcode-cn.com/problems/rising-temperature) | [上升的温度](/solution/0100-0199/0197.Rising%20Temperature/README.md) | `数据库` | 简单 | | | [0198](https://leetcode-cn.com/problems/house-robber) | [打家劫舍](/solution/0100-0199/0198.House%20Robber/README.md) | `数组`,`动态规划` | 中等 | | | [0199](https://leetcode-cn.com/problems/binary-tree-right-side-view) | [二叉树的右视图](/solution/0100-0199/0199.Binary%20Tree%20Right%20Side%20View/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉树` | 中等 | | | [0200](https://leetcode-cn.com/problems/number-of-islands) | [岛屿数量](/solution/0200-0299/0200.Number%20of%20Islands/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`数组`,`矩阵` | 中等 | | | [0201](https://leetcode-cn.com/problems/bitwise-and-of-numbers-range) | [数字范围按位与](/solution/0200-0299/0201.Bitwise%20AND%20of%20Numbers%20Range/README.md) | `位运算` | 中等 | | | [0202](https://leetcode-cn.com/problems/happy-number) | [快乐数](/solution/0200-0299/0202.Happy%20Number/README.md) | `哈希表`,`数学`,`双指针` | 简单 | | | [0203](https://leetcode-cn.com/problems/remove-linked-list-elements) | [移除链表元素](/solution/0200-0299/0203.Remove%20Linked%20List%20Elements/README.md) | `递归`,`链表` | 简单 | | | [0204](https://leetcode-cn.com/problems/count-primes) | [计数质数](/solution/0200-0299/0204.Count%20Primes/README.md) | `数组`,`数学`,`枚举`,`数论` | 中等 | | | [0205](https://leetcode-cn.com/problems/isomorphic-strings) | [同构字符串](/solution/0200-0299/0205.Isomorphic%20Strings/README.md) | `哈希表`,`字符串` | 简单 | | | [0206](https://leetcode-cn.com/problems/reverse-linked-list) | [反转链表](/solution/0200-0299/0206.Reverse%20Linked%20List/README.md) | `递归`,`链表` | 简单 | | | [0207](https://leetcode-cn.com/problems/course-schedule) | [课程表](/solution/0200-0299/0207.Course%20Schedule/README.md) | `深度优先搜索`,`广度优先搜索`,`图`,`拓扑排序` | 中等 | | | [0208](https://leetcode-cn.com/problems/implement-trie-prefix-tree) | [实现 Trie (前缀树)](/solution/0200-0299/0208.Implement%20Trie%20%28Prefix%20Tree%29/README.md) | `设计`,`字典树`,`哈希表`,`字符串` | 中等 | | | [0209](https://leetcode-cn.com/problems/minimum-size-subarray-sum) | [长度最小的子数组](/solution/0200-0299/0209.Minimum%20Size%20Subarray%20Sum/README.md) | `数组`,`二分查找`,`前缀和`,`滑动窗口` | 中等 | | | [0210](https://leetcode-cn.com/problems/course-schedule-ii) | [课程表 II](/solution/0200-0299/0210.Course%20Schedule%20II/README.md) | `深度优先搜索`,`广度优先搜索`,`图`,`拓扑排序` | 中等 | | | [0211](https://leetcode-cn.com/problems/design-add-and-search-words-data-structure) | [添加与搜索单词 - 数据结构设计](/solution/0200-0299/0211.Design%20Add%20and%20Search%20Words%20Data%20Structure/README.md) | `深度优先搜索`,`设计`,`字典树`,`字符串` | 中等 | | | [0212](https://leetcode-cn.com/problems/word-search-ii) | [单词搜索 II](/solution/0200-0299/0212.Word%20Search%20II/README.md) | `字典树`,`数组`,`字符串`,`回溯`,`矩阵` | 困难 | | | [0213](https://leetcode-cn.com/problems/house-robber-ii) | [打家劫舍 II](/solution/0200-0299/0213.House%20Robber%20II/README.md) | `数组`,`动态规划` | 中等 | | | [0214](https://leetcode-cn.com/problems/shortest-palindrome) | [最短回文串](/solution/0200-0299/0214.Shortest%20Palindrome/README.md) | `字符串`,`字符串匹配`,`哈希函数`,`滚动哈希` | 困难 | | | [0215](https://leetcode-cn.com/problems/kth-largest-element-in-an-array) | [数组中的第 K 个最大元素](/solution/0200-0299/0215.Kth%20Largest%20Element%20in%20an%20Array/README.md) | `数组`,`分治`,`快速选择`,`排序`,`堆（优先队列）` | 中等 | | | [0216](https://leetcode-cn.com/problems/combination-sum-iii) | [组合总和 III](/solution/0200-0299/0216.Combination%20Sum%20III/README.md) | `数组`,`回溯` | 中等 | | | [0217](https://leetcode-cn.com/problems/contains-duplicate) | [存在重复元素](/solution/0200-0299/0217.Contains%20Duplicate/README.md) | `数组`,`哈希表`,`排序` | 简单 | | | [0218](https://leetcode-cn.com/problems/the-skyline-problem) | [天际线问题](/solution/0200-0299/0218.The%20Skyline%20Problem/README.md) | `树状数组`,`线段树`,`数组`,`分治`,`有序集合`,`扫描线`,`堆（优先队列）` | 困难 | | | [0219](https://leetcode-cn.com/problems/contains-duplicate-ii) | [存在重复元素 II](/solution/0200-0299/0219.Contains%20Duplicate%20II/README.md) | `数组`,`哈希表`,`滑动窗口` | 简单 | | | [0220](https://leetcode-cn.com/problems/contains-duplicate-iii) | [存在重复元素 III](/solution/0200-0299/0220.Contains%20Duplicate%20III/README.md) | `数组`,`桶排序`,`有序集合`,`排序`,`滑动窗口` | 中等 | | | [0221](https://leetcode-cn.com/problems/maximal-square) | [最大正方形](/solution/0200-0299/0221.Maximal%20Square/README.md) | `数组`,`动态规划`,`矩阵` | 中等 | | | [0222](https://leetcode-cn.com/problems/count-complete-tree-nodes) | [完全二叉树的节点个数](/solution/0200-0299/0222.Count%20Complete%20Tree%20Nodes/README.md) | `树`,`深度优先搜索`,`二分查找`,`二叉树` | 中等 | | | [0223](https://leetcode-cn.com/problems/rectangle-area) | [矩形面积](/solution/0200-0299/0223.Rectangle%20Area/README.md) | `几何`,`数学` | 中等 | | | [0224](https://leetcode-cn.com/problems/basic-calculator) | [基本计算器](/solution/0200-0299/0224.Basic%20Calculator/README.md) | `栈`,`递归`,`数学`,`字符串` | 困难 | | | [0225](https://leetcode-cn.com/problems/implement-stack-using-queues) | [用队列实现栈](/solution/0200-0299/0225.Implement%20Stack%20using%20Queues/README.md) | `栈`,`设计`,`队列` | 简单 | | | [0226](https://leetcode-cn.com/problems/invert-binary-tree) | [翻转二叉树](/solution/0200-0299/0226.Invert%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉树` | 简单 | | | [0227](https://leetcode-cn.com/problems/basic-calculator-ii) | [基本计算器 II](/solution/0200-0299/0227.Basic%20Calculator%20II/README.md) | `栈`,`数学`,`字符串` | 中等 | | | [0228](https://leetcode-cn.com/problems/summary-ranges) | [汇总区间](/solution/0200-0299/0228.Summary%20Ranges/README.md) | `数组` | 简单 | | | [0229](https://leetcode-cn.com/problems/majority-element-ii) | [求众数 II](/solution/0200-0299/0229.Majority%20Element%20II/README.md) | `数组`,`哈希表`,`计数`,`排序` | 中等 | | | [0230](https://leetcode-cn.com/problems/kth-smallest-element-in-a-bst) | [二叉搜索树中第 K 小的元素](/solution/0200-0299/0230.Kth%20Smallest%20Element%20in%20a%20BST/README.md) | `树`,`深度优先搜索`,`二叉搜索树`,`二叉树` | 中等 | | | [0231](https://leetcode-cn.com/problems/power-of-two) | [2 的幂](/solution/0200-0299/0231.Power%20of%20Two/README.md) | `位运算`,`递归`,`数学` | 简单 | | | [0232](https://leetcode-cn.com/problems/implement-queue-using-stacks) | [用栈实现队列](/solution/0200-0299/0232.Implement%20Queue%20using%20Stacks/README.md) | `栈`,`设计`,`队列` | 简单 | | | [0233](https://leetcode-cn.com/problems/number-of-digit-one) | [数字 1 的个数](/solution/0200-0299/0233.Number%20of%20Digit%20One/README.md) | `递归`,`数学`,`动态规划` | 困难 | | | [0234](https://leetcode-cn.com/problems/palindrome-linked-list) | [回文链表](/solution/0200-0299/0234.Palindrome%20Linked%20List/README.md) | `栈`,`递归`,`链表`,`双指针` | 简单 | | | [0235](https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-search-tree) | [二叉搜索树的最近公共祖先](/solution/0200-0299/0235.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Search%20Tree/README.md) | `树`,`深度优先搜索`,`二叉搜索树`,`二叉树` | 简单 | | | [0236](https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-tree) | [二叉树的最近公共祖先](/solution/0200-0299/0236.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`二叉树` | 中等 | | | [0237](https://leetcode-cn.com/problems/delete-node-in-a-linked-list) | [删除链表中的节点](/solution/0200-0299/0237.Delete%20Node%20in%20a%20Linked%20List/README.md) | `链表` | 简单 | | | [0238](https://leetcode-cn.com/problems/product-of-array-except-self) | [除自身以外数组的乘积](/solution/0200-0299/0238.Product%20of%20Array%20Except%20Self/README.md) | `数组`,`前缀和` | 中等 | | | [0239](https://leetcode-cn.com/problems/sliding-window-maximum) | [滑动窗口最大值](/solution/0200-0299/0239.Sliding%20Window%20Maximum/README.md) | `队列`,`数组`,`滑动窗口`,`单调队列`,`堆（优先队列）` | 困难 | | | [0240](https://leetcode-cn.com/problems/search-a-2d-matrix-ii) | [搜索二维矩阵 II](/solution/0200-0299/0240.Search%20a%202D%20Matrix%20II/README.md) | `数组`,`二分查找`,`分治`,`矩阵` | 中等 | | | [0241](https://leetcode-cn.com/problems/different-ways-to-add-parentheses) | [为运算表达式设计优先级](/solution/0200-0299/0241.Different%20Ways%20to%20Add%20Parentheses/README.md) | `递归`,`记忆化搜索`,`数学`,`字符串`,`动态规划` | 中等 | | | [0242](https://leetcode-cn.com/problems/valid-anagram) | [有效的字母异位词](/solution/0200-0299/0242.Valid%20Anagram/README.md) | `哈希表`,`字符串`,`排序` | 简单 | | | [0243](https://leetcode-cn.com/problems/shortest-word-distance) | [最短单词距离](/solution/0200-0299/0243.Shortest%20Word%20Distance/README.md) | `数组`,`字符串` | 简单 | 🔒 | | [0244](https://leetcode-cn.com/problems/shortest-word-distance-ii) | [最短单词距离 II](/solution/0200-0299/0244.Shortest%20Word%20Distance%20II/README.md) | `设计`,`数组`,`哈希表`,`双指针`,`字符串` | 中等 | 🔒 | | [0245](https://leetcode-cn.com/problems/shortest-word-distance-iii) | [最短单词距离 III](/solution/0200-0299/0245.Shortest%20Word%20Distance%20III/README.md) | `数组`,`字符串` | 中等 | 🔒 | | [0246](https://leetcode-cn.com/problems/strobogrammatic-number) | [中心对称数](/solution/0200-0299/0246.Strobogrammatic%20Number/README.md) | `哈希表`,`双指针`,`字符串` | 简单 | 🔒 | | [0247](https://leetcode-cn.com/problems/strobogrammatic-number-ii) | [中心对称数 II](/solution/0200-0299/0247.Strobogrammatic%20Number%20II/README.md) | `递归`,`数组`,`字符串` | 中等 | 🔒 | | [0248](https://leetcode-cn.com/problems/strobogrammatic-number-iii) | [中心对称数 III](/solution/0200-0299/0248.Strobogrammatic%20Number%20III/README.md) | `递归`,`数组`,`字符串` | 困难 | 🔒 | | [0249](https://leetcode-cn.com/problems/group-shifted-strings) | [移位字符串分组](/solution/0200-0299/0249.Group%20Shifted%20Strings/README.md) | `数组`,`哈希表`,`字符串` | 中等 | 🔒 | | [0250](https://leetcode-cn.com/problems/count-univalue-subtrees) | [统计同值子树](/solution/0200-0299/0250.Count%20Univalue%20Subtrees/README.md) | `树`,`深度优先搜索`,`二叉树` | 中等 | 🔒 | | [0251](https://leetcode-cn.com/problems/flatten-2d-vector) | [展开二维向量](/solution/0200-0299/0251.Flatten%202D%20Vector/README.md) | `设计`,`数组`,`双指针`,`迭代器` | 中等 | 🔒 | | [0252](https://leetcode-cn.com/problems/meeting-rooms) | [会议室](/solution/0200-0299/0252.Meeting%20Rooms/README.md) | `数组`,`排序` | 简单 | 🔒 | | [0253](https://leetcode-cn.com/problems/meeting-rooms-ii) | [会议室 II](/solution/0200-0299/0253.Meeting%20Rooms%20II/README.md) | `贪心`,`数组`,`双指针`,`排序`,`堆（优先队列）` | 中等 | 🔒 | | [0254](https://leetcode-cn.com/problems/factor-combinations) | [因子的组合](/solution/0200-0299/0254.Factor%20Combinations/README.md) | `数组`,`回溯` | 中等 | 🔒 | | [0255](https://leetcode-cn.com/problems/verify-preorder-sequence-in-binary-search-tree) | [验证前序遍历序列二叉搜索树](/solution/0200-0299/0255.Verify%20Preorder%20Sequence%20in%20Binary%20Search%20Tree/README.md) | `栈`,`树`,`二叉搜索树`,`递归`,`二叉树`,`单调栈` | 中等 | 🔒 | | [0256](https://leetcode-cn.com/problems/paint-house) | [粉刷房子](/solution/0200-0299/0256.Paint%20House/README.md) | `数组`,`动态规划` | 中等 | 🔒 | | [0257](https://leetcode-cn.com/problems/binary-tree-paths) | [二叉树的所有路径](/solution/0200-0299/0257.Binary%20Tree%20Paths/README.md) | `树`,`深度优先搜索`,`字符串`,`回溯`,`二叉树` | 简单 | | | [0258](https://leetcode-cn.com/problems/add-digits) | [各位相加](/solution/0200-0299/0258.Add%20Digits/README.md) | `数学`,`数论`,`模拟` | 简单 | | | [0259](https://leetcode-cn.com/problems/3sum-smaller) | [较小的三数之和](/solution/0200-0299/0259.3Sum%20Smaller/README.md) | `数组`,`双指针`,`二分查找`,`排序` | 中等 | 🔒 | | [0260](https://leetcode-cn.com/problems/single-number-iii) | [只出现一次的数字 III](/solution/0200-0299/0260.Single%20Number%20III/README.md) | `位运算`,`数组` | 中等 | | | [0261](https://leetcode-cn.com/problems/graph-valid-tree) | [以图判树](/solution/0200-0299/0261.Graph%20Valid%20Tree/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`图` | 中等 | 🔒 | | [0262](https://leetcode-cn.com/problems/trips-and-users) | [行程和用户](/solution/0200-0299/0262.Trips%20and%20Users/README.md) | `数据库` | 困难 | | | [0263](https://leetcode-cn.com/problems/ugly-number) | [丑数](/solution/0200-0299/0263.Ugly%20Number/README.md) | `数学` | 简单 | | | [0264](https://leetcode-cn.com/problems/ugly-number-ii) | [丑数 II](/solution/0200-0299/0264.Ugly%20Number%20II/README.md) | `哈希表`,`数学`,`动态规划`,`堆（优先队列）` | 中等 | | | [0265](https://leetcode-cn.com/problems/paint-house-ii) | [粉刷房子 II](/solution/0200-0299/0265.Paint%20House%20II/README.md) | `数组`,`动态规划` | 困难 | 🔒 | | [0266](https://leetcode-cn.com/problems/palindrome-permutation) | [回文排列](/solution/0200-0299/0266.Palindrome%20Permutation/README.md) | `位运算`,`哈希表`,`字符串` | 简单 | 🔒 | | [0267](https://leetcode-cn.com/problems/palindrome-permutation-ii) | [回文排列 II](/solution/0200-0299/0267.Palindrome%20Permutation%20II/README.md) | `哈希表`,`字符串`,`回溯` | 中等 | 🔒 | | [0268](https://leetcode-cn.com/problems/missing-number) | [丢失的数字](/solution/0200-0299/0268.Missing%20Number/README.md) | `位运算`,`数组`,`哈希表`,`数学`,`排序` | 简单 | | | [0269](https://leetcode-cn.com/problems/alien-dictionary) | [火星词典](/solution/0200-0299/0269.Alien%20Dictionary/README.md) | `深度优先搜索`,`广度优先搜索`,`图`,`拓扑排序`,`数组`,`字符串` | 困难 | 🔒 | | [0270](https://leetcode-cn.com/problems/closest-binary-search-tree-value) | [最接近的二叉搜索树值](/solution/0200-0299/0270.Closest%20Binary%20Search%20Tree%20Value/README.md) | `树`,`深度优先搜索`,`二叉搜索树`,`二分查找`,`二叉树` | 简单 | 🔒 | | [0271](https://leetcode-cn.com/problems/encode-and-decode-strings) | [字符串的编码与解码](/solution/0200-0299/0271.Encode%20and%20Decode%20Strings/README.md) | `设计`,`数组`,`字符串` | 中等 | 🔒 | | [0272](https://leetcode-cn.com/problems/closest-binary-search-tree-value-ii) | [最接近的二叉搜索树值 II](/solution/0200-0299/0272.Closest%20Binary%20Search%20Tree%20Value%20II/README.md) | `栈`,`树`,`深度优先搜索`,`二叉搜索树`,`双指针`,`二叉树`,`堆（优先队列）` | 困难 | 🔒 | | [0273](https://leetcode-cn.com/problems/integer-to-english-words) | [整数转换英文表示](/solution/0200-0299/0273.Integer%20to%20English%20Words/README.md) | `递归`,`数学`,`字符串` | 困难 | | | [0274](https://leetcode-cn.com/problems/h-index) | [H 指数](/solution/0200-0299/0274.H-Index/README.md) | `数组`,`计数排序`,`排序` | 中等 | | | [0275](https://leetcode-cn.com/problems/h-index-ii) | [H 指数 II](/solution/0200-0299/0275.H-Index%20II/README.md) | `数组`,`二分查找` | 中等 | | | [0276](https://leetcode-cn.com/problems/paint-fence) | [栅栏涂色](/solution/0200-0299/0276.Paint%20Fence/README.md) | `动态规划` | 中等 | 🔒 | | [0277](https://leetcode-cn.com/problems/find-the-celebrity) | [搜寻名人](/solution/0200-0299/0277.Find%20the%20Celebrity/README.md) | `贪心`,`图`,`双指针`,`交互` | 中等 | 🔒 | | [0278](https://leetcode-cn.com/problems/first-bad-version) | [第一个错误的版本](/solution/0200-0299/0278.First%20Bad%20Version/README.md) | `二分查找`,`交互` | 简单 | | | [0279](https://leetcode-cn.com/problems/perfect-squares) | [完全平方数](/solution/0200-0299/0279.Perfect%20Squares/README.md) | `广度优先搜索`,`数学`,`动态规划` | 中等 | | | [0280](https://leetcode-cn.com/problems/wiggle-sort) | [摆动排序](/solution/0200-0299/0280.Wiggle%20Sort/README.md) | `贪心`,`数组`,`排序` | 中等 | 🔒 | | [0281](https://leetcode-cn.com/problems/zigzag-iterator) | [锯齿迭代器](/solution/0200-0299/0281.Zigzag%20Iterator/README.md) | `设计`,`队列`,`数组`,`迭代器` | 中等 | 🔒 | | [0282](https://leetcode-cn.com/problems/expression-add-operators) | [给表达式添加运算符](/solution/0200-0299/0282.Expression%20Add%20Operators/README.md) | `数学`,`字符串`,`回溯` | 困难 | | | [0283](https://leetcode-cn.com/problems/move-zeroes) | [移动零](/solution/0200-0299/0283.Move%20Zeroes/README.md) | `数组`,`双指针` | 简单 | | | [0284](https://leetcode-cn.com/problems/peeking-iterator) | [顶端迭代器](/solution/0200-0299/0284.Peeking%20Iterator/README.md) | `设计`,`数组`,`迭代器` | 中等 | | | [0285](https://leetcode-cn.com/problems/inorder-successor-in-bst) | [二叉搜索树中的中序后继](/solution/0200-0299/0285.Inorder%20Successor%20in%20BST/README.md) | `树`,`深度优先搜索`,`二叉搜索树`,`二叉树` | 中等 | 🔒 | | [0286](https://leetcode-cn.com/problems/walls-and-gates) | [墙与门](/solution/0200-0299/0286.Walls%20and%20Gates/README.md) | `广度优先搜索`,`数组`,`矩阵` | 中等 | 🔒 | | [0287](https://leetcode-cn.com/problems/find-the-duplicate-number) | [寻找重复数](/solution/0200-0299/0287.Find%20the%20Duplicate%20Number/README.md) | `位运算`,`数组`,`双指针`,`二分查找` | 中等 | | | [0288](https://leetcode-cn.com/problems/unique-word-abbreviation) | [单词的唯一缩写](/solution/0200-0299/0288.Unique%20Word%20Abbreviation/README.md) | `设计`,`数组`,`哈希表`,`字符串` | 中等 | 🔒 | | [0289](https://leetcode-cn.com/problems/game-of-life) | [生命游戏](/solution/0200-0299/0289.Game%20of%20Life/README.md) | `数组`,`矩阵`,`模拟` | 中等 | | | [0290](https://leetcode-cn.com/problems/word-pattern) | [单词规律](/solution/0200-0299/0290.Word%20Pattern/README.md) | `哈希表`,`字符串` | 简单 | | | [0291](https://leetcode-cn.com/problems/word-pattern-ii) | [单词规律 II](/solution/0200-0299/0291.Word%20Pattern%20II/README.md) | `哈希表`,`字符串`,`回溯` | 中等 | 🔒 | | [0292](https://leetcode-cn.com/problems/nim-game) | [Nim 游戏](/solution/0200-0299/0292.Nim%20Game/README.md) | `脑筋急转弯`,`数学`,`博弈` | 简单 | | | [0293](https://leetcode-cn.com/problems/flip-game) | [翻转游戏](/solution/0200-0299/0293.Flip%20Game/README.md) | `字符串` | 简单 | 🔒 | | [0294](https://leetcode-cn.com/problems/flip-game-ii) | [翻转游戏 II](/solution/0200-0299/0294.Flip%20Game%20II/README.md) | `记忆化搜索`,`数学`,`动态规划`,`回溯`,`博弈` | 中等 | 🔒 | | [0295](https://leetcode-cn.com/problems/find-median-from-data-stream) | [数据流的中位数](/solution/0200-0299/0295.Find%20Median%20from%20Data%20Stream/README.md) | `设计`,`双指针`,`数据流`,`排序`,`堆（优先队列）` | 困难 | | | [0296](https://leetcode-cn.com/problems/best-meeting-point) | [最佳的碰头地点](/solution/0200-0299/0296.Best%20Meeting%20Point/README.md) | `数组`,`数学`,`矩阵`,`排序` | 困难 | 🔒 | | [0297](https://leetcode-cn.com/problems/serialize-and-deserialize-binary-tree) | [二叉树的序列化与反序列化](/solution/0200-0299/0297.Serialize%20and%20Deserialize%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`设计`,`字符串`,`二叉树` | 困难 | | | [0298](https://leetcode-cn.com/problems/binary-tree-longest-consecutive-sequence) | [二叉树最长连续序列](/solution/0200-0299/0298.Binary%20Tree%20Longest%20Consecutive%20Sequence/README.md) | `树`,`深度优先搜索`,`二叉树` | 中等 | 🔒 | | [0299](https://leetcode-cn.com/problems/bulls-and-cows) | [猜数字游戏](/solution/0200-0299/0299.Bulls%20and%20Cows/README.md) | `哈希表`,`字符串`,`计数` | 中等 | | | [0300](https://leetcode-cn.com/problems/longest-increasing-subsequence) | [最长递增子序列](/solution/0300-0399/0300.Longest%20Increasing%20Subsequence/README.md) | `数组`,`二分查找`,`动态规划` | 中等 | | | [0301](https://leetcode-cn.com/problems/remove-invalid-parentheses) | [删除无效的括号](/solution/0300-0399/0301.Remove%20Invalid%20Parentheses/README.md) | `广度优先搜索`,`字符串`,`回溯` | 困难 | | | [0302](https://leetcode-cn.com/problems/smallest-rectangle-enclosing-black-pixels) | [包含全部黑色像素的最小矩形](/solution/0300-0399/0302.Smallest%20Rectangle%20Enclosing%20Black%20Pixels/README.md) | `深度优先搜索`,`广度优先搜索`,`数组`,`二分查找`,`矩阵` | 困难 | 🔒 | | [0303](https://leetcode-cn.com/problems/range-sum-query-immutable) | [区域和检索 - 数组不可变](/solution/0300-0399/0303.Range%20Sum%20Query%20-%20Immutable/README.md) | `设计`,`数组`,`前缀和` | 简单 | | | [0304](https://leetcode-cn.com/problems/range-sum-query-2d-immutable) | [二维区域和检索 - 矩阵不可变](/solution/0300-0399/0304.Range%20Sum%20Query%202D%20-%20Immutable/README.md) | `设计`,`数组`,`矩阵`,`前缀和` | 中等 | | | [0305](https://leetcode-cn.com/problems/number-of-islands-ii) | [岛屿数量 II](/solution/0300-0399/0305.Number%20of%20Islands%20II/README.md) | `并查集`,`数组` | 困难 | 🔒 | | [0306](https://leetcode-cn.com/problems/additive-number) | [累加数](/solution/0300-0399/0306.Additive%20Number/README.md) | `字符串`,`回溯` | 中等 | | | [0307](https://leetcode-cn.com/problems/range-sum-query-mutable) | [区域和检索 - 数组可修改](/solution/0300-0399/0307.Range%20Sum%20Query%20-%20Mutable/README.md) | `设计`,`树状数组`,`线段树`,`数组` | 中等 | | | [0308](https://leetcode-cn.com/problems/range-sum-query-2d-mutable) | [二维区域和检索 - 可变](/solution/0300-0399/0308.Range%20Sum%20Query%202D%20-%20Mutable/README.md) | `设计`,`树状数组`,`线段树`,`数组`,`矩阵` | 困难 | 🔒 | | [0309](https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-with-cooldown) | [最佳买卖股票时机含冷冻期](/solution/0300-0399/0309.Best%20Time%20to%20Buy%20and%20Sell%20Stock%20with%20Cooldown/README.md) | `数组`,`动态规划` | 中等 | | | [0310](https://leetcode-cn.com/problems/minimum-height-trees) | [最小高度树](/solution/0300-0399/0310.Minimum%20Height%20Trees/README.md) | `深度优先搜索`,`广度优先搜索`,`图`,`拓扑排序` | 中等 | | | [0311](https://leetcode-cn.com/problems/sparse-matrix-multiplication) | [稀疏矩阵的乘法](/solution/0300-0399/0311.Sparse%20Matrix%20Multiplication/README.md) | `数组`,`哈希表`,`矩阵` | 中等 | 🔒 | | [0312](https://leetcode-cn.com/problems/burst-balloons) | [戳气球](/solution/0300-0399/0312.Burst%20Balloons/README.md) | `数组`,`动态规划` | 困难 | | | [0313](https://leetcode-cn.com/problems/super-ugly-number) | [超级丑数](/solution/0300-0399/0313.Super%20Ugly%20Number/README.md) | `数组`,`哈希表`,`数学`,`动态规划`,`堆（优先队列）` | 中等 | | | [0314](https://leetcode-cn.com/problems/binary-tree-vertical-order-traversal) | [二叉树的垂直遍历](/solution/0300-0399/0314.Binary%20Tree%20Vertical%20Order%20Traversal/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`哈希表`,`二叉树` | 中等 | 🔒 | | [0315](https://leetcode-cn.com/problems/count-of-smaller-numbers-after-self) | [计算右侧小于当前元素的个数](/solution/0300-0399/0315.Count%20of%20Smaller%20Numbers%20After%20Self/README.md) | `树状数组`,`线段树`,`数组`,`二分查找`,`分治`,`有序集合`,`归并排序` | 困难 | | | [0316](https://leetcode-cn.com/problems/remove-duplicate-letters) | [去除重复字母](/solution/0300-0399/0316.Remove%20Duplicate%20Letters/README.md) | `栈`,`贪心`,`字符串`,`单调栈` | 中等 | | | [0317](https://leetcode-cn.com/problems/shortest-distance-from-all-buildings) | [离建筑物最近的距离](/solution/0300-0399/0317.Shortest%20Distance%20from%20All%20Buildings/README.md) | `广度优先搜索`,`数组`,`矩阵` | 困难 | 🔒 | | [0318](https://leetcode-cn.com/problems/maximum-product-of-word-lengths) | [最大单词长度乘积](/solution/0300-0399/0318.Maximum%20Product%20of%20Word%20Lengths/README.md) | `位运算`,`数组`,`字符串` | 中等 | | | [0319](https://leetcode-cn.com/problems/bulb-switcher) | [灯泡开关](/solution/0300-0399/0319.Bulb%20Switcher/README.md) | `脑筋急转弯`,`数学` | 中等 | | | [0320](https://leetcode-cn.com/problems/generalized-abbreviation) | [列举单词的全部缩写](/solution/0300-0399/0320.Generalized%20Abbreviation/README.md) | `位运算`,`字符串`,`回溯` | 中等 | 🔒 | | [0321](https://leetcode-cn.com/problems/create-maximum-number) | [拼接最大数](/solution/0300-0399/0321.Create%20Maximum%20Number/README.md) | `栈`,`贪心`,`单调栈` | 困难 | | | [0322](https://leetcode-cn.com/problems/coin-change) | [零钱兑换](/solution/0300-0399/0322.Coin%20Change/README.md) | `广度优先搜索`,`数组`,`动态规划` | 中等 | | | [0323](https://leetcode-cn.com/problems/number-of-connected-components-in-an-undirected-graph) | [无向图中连通分量的数目](/solution/0300-0399/0323.Number%20of%20Connected%20Components%20in%20an%20Undirected%20Graph/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`图` | 中等 | 🔒 | | [0324](https://leetcode-cn.com/problems/wiggle-sort-ii) | [摆动排序 II](/solution/0300-0399/0324.Wiggle%20Sort%20II/README.md) | `数组`,`分治`,`快速选择`,`排序` | 中等 | | | [0325](https://leetcode-cn.com/problems/maximum-size-subarray-sum-equals-k) | [和等于 k 的最长子数组长度](/solution/0300-0399/0325.Maximum%20Size%20Subarray%20Sum%20Equals%20k/README.md) | `数组`,`哈希表` | 中等 | 🔒 | | [0326](https://leetcode-cn.com/problems/power-of-three) | [3 的幂](/solution/0300-0399/0326.Power%20of%20Three/README.md) | `递归`,`数学` | 简单 | | | [0327](https://leetcode-cn.com/problems/count-of-range-sum) | [区间和的个数](/solution/0300-0399/0327.Count%20of%20Range%20Sum/README.md) | `树状数组`,`线段树`,`数组`,`二分查找`,`分治`,`有序集合`,`归并排序` | 困难 | | | [0328](https://leetcode-cn.com/problems/odd-even-linked-list) | [奇偶链表](/solution/0300-0399/0328.Odd%20Even%20Linked%20List/README.md) | `链表` | 中等 | | | [0329](https://leetcode-cn.com/problems/longest-increasing-path-in-a-matrix) | [矩阵中的最长递增路径](/solution/0300-0399/0329.Longest%20Increasing%20Path%20in%20a%20Matrix/README.md) | `深度优先搜索`,`广度优先搜索`,`图`,`拓扑排序`,`记忆化搜索`,`动态规划` | 困难 | | | [0330](https://leetcode-cn.com/problems/patching-array) | [按要求补齐数组](/solution/0300-0399/0330.Patching%20Array/README.md) | `贪心`,`数组` | 困难 | | | [0331](https://leetcode-cn.com/problems/verify-preorder-serialization-of-a-binary-tree) | [验证二叉树的前序序列化](/solution/0300-0399/0331.Verify%20Preorder%20Serialization%20of%20a%20Binary%20Tree/README.md) | `栈`,`树`,`字符串`,`二叉树` | 中等 | | | [0332](https://leetcode-cn.com/problems/reconstruct-itinerary) | [重新安排行程](/solution/0300-0399/0332.Reconstruct%20Itinerary/README.md) | `深度优先搜索`,`图`,`欧拉回路` | 困难 | | | [0333](https://leetcode-cn.com/problems/largest-bst-subtree) | [最大 BST 子树](/solution/0300-0399/0333.Largest%20BST%20Subtree/README.md) | `树`,`深度优先搜索`,`二叉搜索树`,`动态规划`,`二叉树` | 中等 | 🔒 | | [0334](https://leetcode-cn.com/problems/increasing-triplet-subsequence) | [递增的三元子序列](/solution/0300-0399/0334.Increasing%20Triplet%20Subsequence/README.md) | `贪心`,`数组` | 中等 | | | [0335](https://leetcode-cn.com/problems/self-crossing) | [路径交叉](/solution/0300-0399/0335.Self%20Crossing/README.md) | `几何`,`数组`,`数学` | 困难 | | | [0336](https://leetcode-cn.com/problems/palindrome-pairs) | [回文对](/solution/0300-0399/0336.Palindrome%20Pairs/README.md) | `字典树`,`数组`,`哈希表`,`字符串` | 困难 | | | [0337](https://leetcode-cn.com/problems/house-robber-iii) | [打家劫舍 III](/solution/0300-0399/0337.House%20Robber%20III/README.md) | `树`,`深度优先搜索`,`动态规划`,`二叉树` | 中等 | | | [0338](https://leetcode-cn.com/problems/counting-bits) | [比特位计数](/solution/0300-0399/0338.Counting%20Bits/README.md) | `位运算`,`动态规划` | 简单 | | | [0339](https://leetcode-cn.com/problems/nested-list-weight-sum) | [嵌套列表权重和](/solution/0300-0399/0339.Nested%20List%20Weight%20Sum/README.md) | `深度优先搜索`,`广度优先搜索` | 中等 | 🔒 | | [0340](https://leetcode-cn.com/problems/longest-substring-with-at-most-k-distinct-characters) | [至多包含 K 个不同字符的最长子串](/solution/0300-0399/0340.Longest%20Substring%20with%20At%20Most%20K%20Distinct%20Characters/README.md) | `哈希表`,`字符串`,`滑动窗口` | 中等 | 🔒 | | [0341](https://leetcode-cn.com/problems/flatten-nested-list-iterator) | [扁平化嵌套列表迭代器](/solution/0300-0399/0341.Flatten%20Nested%20List%20Iterator/README.md) | `栈`,`树`,`深度优先搜索`,`设计`,`队列`,`迭代器` | 中等 | | | [0342](https://leetcode-cn.com/problems/power-of-four) | [4 的幂](/solution/0300-0399/0342.Power%20of%20Four/README.md) | `位运算`,`递归`,`数学` | 简单 | | | [0343](https://leetcode-cn.com/problems/integer-break) | [整数拆分](/solution/0300-0399/0343.Integer%20Break/README.md) | `数学`,`动态规划` | 中等 | | | [0344](https://leetcode-cn.com/problems/reverse-string) | [反转字符串](/solution/0300-0399/0344.Reverse%20String/README.md) | `递归`,`双指针`,`字符串` | 简单 | | | [0345](https://leetcode-cn.com/problems/reverse-vowels-of-a-string) | [反转字符串中的元音字母](/solution/0300-0399/0345.Reverse%20Vowels%20of%20a%20String/README.md) | `双指针`,`字符串` | 简单 | | | [0346](https://leetcode-cn.com/problems/moving-average-from-data-stream) | [数据流中的移动平均值](/solution/0300-0399/0346.Moving%20Average%20from%20Data%20Stream/README.md) | `设计`,`队列`,`数组`,`数据流` | 简单 | 🔒 | | [0347](https://leetcode-cn.com/problems/top-k-frequent-elements) | [前 K 个高频元素](/solution/0300-0399/0347.Top%20K%20Frequent%20Elements/README.md) | `数组`,`哈希表`,`分治`,`桶排序`,`计数`,`快速选择`,`排序`,`堆（优先队列）` | 中等 | | | [0348](https://leetcode-cn.com/problems/design-tic-tac-toe) | [设计井字棋](/solution/0300-0399/0348.Design%20Tic-Tac-Toe/README.md) | `设计`,`数组`,`哈希表`,`矩阵` | 中等 | 🔒 | | [0349](https://leetcode-cn.com/problems/intersection-of-two-arrays) | [两个数组的交集](/solution/0300-0399/0349.Intersection%20of%20Two%20Arrays/README.md) | `数组`,`哈希表`,`双指针`,`二分查找`,`排序` | 简单 | | | [0350](https://leetcode-cn.com/problems/intersection-of-two-arrays-ii) | [两个数组的交集 II](/solution/0300-0399/0350.Intersection%20of%20Two%20Arrays%20II/README.md) | `数组`,`哈希表`,`双指针`,`二分查找`,`排序` | 简单 | | | [0351](https://leetcode-cn.com/problems/android-unlock-patterns) | [安卓系统手势解锁](/solution/0300-0399/0351.Android%20Unlock%20Patterns/README.md) | `动态规划`,`回溯` | 中等 | 🔒 | | [0352](https://leetcode-cn.com/problems/data-stream-as-disjoint-intervals) | [将数据流变为多个不相交区间](/solution/0300-0399/0352.Data%20Stream%20as%20Disjoint%20Intervals/README.md) | `设计`,`二分查找`,`有序集合` | 困难 | | | [0353](https://leetcode-cn.com/problems/design-snake-game) | [贪吃蛇](/solution/0300-0399/0353.Design%20Snake%20Game/README.md) | `设计`,`队列`,`数组`,`矩阵` | 中等 | 🔒 | | [0354](https://leetcode-cn.com/problems/russian-doll-envelopes) | [俄罗斯套娃信封问题](/solution/0300-0399/0354.Russian%20Doll%20Envelopes/README.md) | `数组`,`二分查找`,`动态规划`,`排序` | 困难 | | | [0355](https://leetcode-cn.com/problems/design-twitter) | [设计推特](/solution/0300-0399/0355.Design%20Twitter/README.md) | `设计`,`哈希表`,`链表`,`堆（优先队列）` | 中等 | | | [0356](https://leetcode-cn.com/problems/line-reflection) | [直线镜像](/solution/0300-0399/0356.Line%20Reflection/README.md) | `数组`,`哈希表`,`数学` | 中等 | 🔒 | | [0357](https://leetcode-cn.com/problems/count-numbers-with-unique-digits) | [计算各个位数不同的数字个数](/solution/0300-0399/0357.Count%20Numbers%20with%20Unique%20Digits/README.md) | `数学`,`动态规划`,`回溯` | 中等 | | | [0358](https://leetcode-cn.com/problems/rearrange-string-k-distance-apart) | [K 距离间隔重排字符串](/solution/0300-0399/0358.Rearrange%20String%20k%20Distance%20Apart/README.md) | `贪心`,`哈希表`,`字符串`,`计数`,`排序`,`堆（优先队列）` | 困难 | 🔒 | | [0359](https://leetcode-cn.com/problems/logger-rate-limiter) | [日志速率限制器](/solution/0300-0399/0359.Logger%20Rate%20Limiter/README.md) | `设计`,`哈希表` | 简单 | 🔒 | | [0360](https://leetcode-cn.com/problems/sort-transformed-array) | [有序转化数组](/solution/0300-0399/0360.Sort%20Transformed%20Array/README.md) | `数组`,`数学`,`双指针`,`排序` | 中等 | 🔒 | | [0361](https://leetcode-cn.com/problems/bomb-enemy) | [轰炸敌人](/solution/0300-0399/0361.Bomb%20Enemy/README.md) | `数组`,`动态规划`,`矩阵` | 中等 | 🔒 | | [0362](https://leetcode-cn.com/problems/design-hit-counter) | [敲击计数器](/solution/0300-0399/0362.Design%20Hit%20Counter/README.md) | `设计`,`队列`,`数组`,`哈希表`,`二分查找` | 中等 | 🔒 | | [0363](https://leetcode-cn.com/problems/max-sum-of-rectangle-no-larger-than-k) | [矩形区域不超过 K 的最大数值和](/solution/0300-0399/0363.Max%20Sum%20of%20Rectangle%20No%20Larger%20Than%20K/README.md) | `数组`,`二分查找`,`动态规划`,`矩阵`,`有序集合` | 困难 | | | [0364](https://leetcode-cn.com/problems/nested-list-weight-sum-ii) | [加权嵌套序列和 II](/solution/0300-0399/0364.Nested%20List%20Weight%20Sum%20II/README.md) | `栈`,`深度优先搜索`,`广度优先搜索` | 中等 | 🔒 | | [0365](https://leetcode-cn.com/problems/water-and-jug-problem) | [水壶问题](/solution/0300-0399/0365.Water%20and%20Jug%20Problem/README.md) | `深度优先搜索`,`广度优先搜索`,`数学` | 中等 | | | [0366](https://leetcode-cn.com/problems/find-leaves-of-binary-tree) | [寻找二叉树的叶子节点](/solution/0300-0399/0366.Find%20Leaves%20of%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`二叉树` | 中等 | 🔒 | | [0367](https://leetcode-cn.com/problems/valid-perfect-square) | [有效的完全平方数](/solution/0300-0399/0367.Valid%20Perfect%20Square/README.md) | `数学`,`二分查找` | 简单 | | | [0368](https://leetcode-cn.com/problems/largest-divisible-subset) | [最大整除子集](/solution/0300-0399/0368.Largest%20Divisible%20Subset/README.md) | `数组`,`数学`,`动态规划`,`排序` | 中等 | | | [0369](https://leetcode-cn.com/problems/plus-one-linked-list) | [给单链表加一](/solution/0300-0399/0369.Plus%20One%20Linked%20List/README.md) | `链表`,`数学` | 中等 | 🔒 | | [0370](https://leetcode-cn.com/problems/range-addition) | [区间加法](/solution/0300-0399/0370.Range%20Addition/README.md) | `数组`,`前缀和` | 中等 | 🔒 | | [0371](https://leetcode-cn.com/problems/sum-of-two-integers) | [两整数之和](/solution/0300-0399/0371.Sum%20of%20Two%20Integers/README.md) | `位运算`,`数学` | 中等 | | | [0372](https://leetcode-cn.com/problems/super-pow) | [超级次方](/solution/0300-0399/0372.Super%20Pow/README.md) | `数学`,`分治` | 中等 | | | [0373](https://leetcode-cn.com/problems/find-k-pairs-with-smallest-sums) | [查找和最小的 K 对数字](/solution/0300-0399/0373.Find%20K%20Pairs%20with%20Smallest%20Sums/README.md) | `数组`,`堆（优先队列）` | 中等 | | | [0374](https://leetcode-cn.com/problems/guess-number-higher-or-lower) | [猜数字大小](/solution/0300-0399/0374.Guess%20Number%20Higher%20or%20Lower/README.md) | `二分查找`,`交互` | 简单 | | | [0375](https://leetcode-cn.com/problems/guess-number-higher-or-lower-ii) | [猜数字大小 II](/solution/0300-0399/0375.Guess%20Number%20Higher%20or%20Lower%20II/README.md) | `数学`,`动态规划`,`博弈` | 中等 | | | [0376](https://leetcode-cn.com/problems/wiggle-subsequence) | [摆动序列](/solution/0300-0399/0376.Wiggle%20Subsequence/README.md) | `贪心`,`数组`,`动态规划` | 中等 | | | [0377](https://leetcode-cn.com/problems/combination-sum-iv) | [组合总和 Ⅳ](/solution/0300-0399/0377.Combination%20Sum%20IV/README.md) | `数组`,`动态规划` | 中等 | | | [0378](https://leetcode-cn.com/problems/kth-smallest-element-in-a-sorted-matrix) | [有序矩阵中第 K 小的元素](/solution/0300-0399/0378.Kth%20Smallest%20Element%20in%20a%20Sorted%20Matrix/README.md) | `数组`,`二分查找`,`矩阵`,`排序`,`堆（优先队列）` | 中等 | | | [0379](https://leetcode-cn.com/problems/design-phone-directory) | [电话目录管理系统](/solution/0300-0399/0379.Design%20Phone%20Directory/README.md) | `设计`,`队列`,`数组`,`哈希表`,`链表` | 中等 | 🔒 | | [0380](https://leetcode-cn.com/problems/insert-delete-getrandom-o1) | [O(1) 时间插入、删除和获取随机元素](/solution/0300-0399/0380.Insert%20Delete%20GetRandom%20O%281%29/README.md) | `设计`,`数组`,`哈希表`,`数学`,`随机化` | 中等 | | | [0381](https://leetcode-cn.com/problems/insert-delete-getrandom-o1-duplicates-allowed) | [O(1) 时间插入、删除和获取随机元素 - 允许重复](/solution/0300-0399/0381.Insert%20Delete%20GetRandom%20O%281%29%20-%20Duplicates%20allowed/README.md) | `设计`,`数组`,`哈希表`,`数学`,`随机化` | 困难 | | | [0382](https://leetcode-cn.com/problems/linked-list-random-node) | [链表随机节点](/solution/0300-0399/0382.Linked%20List%20Random%20Node/README.md) | `水塘抽样`,`链表`,`数学`,`随机化` | 中等 | | | [0383](https://leetcode-cn.com/problems/ransom-note) | [赎金信](/solution/0300-0399/0383.Ransom%20Note/README.md) | `哈希表`,`字符串`,`计数` | 简单 | | | [0384](https://leetcode-cn.com/problems/shuffle-an-array) | [打乱数组](/solution/0300-0399/0384.Shuffle%20an%20Array/README.md) | `数组`,`数学`,`随机化` | 中等 | | | [0385](https://leetcode-cn.com/problems/mini-parser) | [迷你语法分析器](/solution/0300-0399/0385.Mini%20Parser/README.md) | `栈`,`深度优先搜索`,`字符串` | 中等 | | | [0386](https://leetcode-cn.com/problems/lexicographical-numbers) | [字典序排数](/solution/0300-0399/0386.Lexicographical%20Numbers/README.md) | `深度优先搜索`,`字典树` | 中等 | | | [0387](https://leetcode-cn.com/problems/first-unique-character-in-a-string) | [字符串中的第一个唯一字符](/solution/0300-0399/0387.First%20Unique%20Character%20in%20a%20String/README.md) | `队列`,`哈希表`,`字符串`,`计数` | 简单 | | | [0388](https://leetcode-cn.com/problems/longest-absolute-file-path) | [文件的最长绝对路径](/solution/0300-0399/0388.Longest%20Absolute%20File%20Path/README.md) | `栈`,`深度优先搜索`,`字符串` | 中等 | | | [0389](https://leetcode-cn.com/problems/find-the-difference) | [找不同](/solution/0300-0399/0389.Find%20the%20Difference/README.md) | `位运算`,`哈希表`,`字符串`,`排序` | 简单 | | | [0390](https://leetcode-cn.com/problems/elimination-game) | [消除游戏](/solution/0300-0399/0390.Elimination%20Game/README.md) | `数学` | 中等 | | | [0391](https://leetcode-cn.com/problems/perfect-rectangle) | [完美矩形](/solution/0300-0399/0391.Perfect%20Rectangle/README.md) | `数组`,`扫描线` | 困难 | | | [0392](https://leetcode-cn.com/problems/is-subsequence) | [判断子序列](/solution/0300-0399/0392.Is%20Subsequence/README.md) | `双指针`,`字符串`,`动态规划` | 简单 | | | [0393](https://leetcode-cn.com/problems/utf-8-validation) | [UTF-8 编码验证](/solution/0300-0399/0393.UTF-8%20Validation/README.md) | `位运算`,`数组` | 中等 | | | [0394](https://leetcode-cn.com/problems/decode-string) | [字符串解码](/solution/0300-0399/0394.Decode%20String/README.md) | `栈`,`递归`,`字符串` | 中等 | | | [0395](https://leetcode-cn.com/problems/longest-substring-with-at-least-k-repeating-characters) | [至少有 K 个重复字符的最长子串](/solution/0300-0399/0395.Longest%20Substring%20with%20At%20Least%20K%20Repeating%20Characters/README.md) | `哈希表`,`字符串`,`分治`,`滑动窗口` | 中等 | | | [0396](https://leetcode-cn.com/problems/rotate-function) | [旋转函数](/solution/0300-0399/0396.Rotate%20Function/README.md) | `数学`,`动态规划` | 中等 | | | [0397](https://leetcode-cn.com/problems/integer-replacement) | [整数替换](/solution/0300-0399/0397.Integer%20Replacement/README.md) | `贪心`,`位运算`,`记忆化搜索`,`动态规划` | 中等 | | | [0398](https://leetcode-cn.com/problems/random-pick-index) | [随机数索引](/solution/0300-0399/0398.Random%20Pick%20Index/README.md) | `水塘抽样`,`哈希表`,`数学`,`随机化` | 中等 | | | [0399](https://leetcode-cn.com/problems/evaluate-division) | [除法求值](/solution/0300-0399/0399.Evaluate%20Division/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`图`,`数组`,`最短路` | 中等 | | | [0400](https://leetcode-cn.com/problems/nth-digit) | [第 N 位数字](/solution/0400-0499/0400.Nth%20Digit/README.md) | `数学`,`二分查找` | 中等 | | | [0401](https://leetcode-cn.com/problems/binary-watch) | [二进制手表](/solution/0400-0499/0401.Binary%20Watch/README.md) | `位运算`,`回溯` | 简单 | | | [0402](https://leetcode-cn.com/problems/remove-k-digits) | [移掉 K 位数字](/solution/0400-0499/0402.Remove%20K%20Digits/README.md) | `栈`,`贪心`,`字符串`,`单调栈` | 中等 | | | [0403](https://leetcode-cn.com/problems/frog-jump) | [青蛙过河](/solution/0400-0499/0403.Frog%20Jump/README.md) | `数组`,`动态规划` | 困难 | | | [0404](https://leetcode-cn.com/problems/sum-of-left-leaves) | [左叶子之和](/solution/0400-0499/0404.Sum%20of%20Left%20Leaves/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉树` | 简单 | | | [0405](https://leetcode-cn.com/problems/convert-a-number-to-hexadecimal) | [数字转换为十六进制数](/solution/0400-0499/0405.Convert%20a%20Number%20to%20Hexadecimal/README.md) | `位运算`,`数学` | 简单 | | | [0406](https://leetcode-cn.com/problems/queue-reconstruction-by-height) | [根据身高重建队列](/solution/0400-0499/0406.Queue%20Reconstruction%20by%20Height/README.md) | `贪心`,`数组`,`排序` | 中等 | | | [0407](https://leetcode-cn.com/problems/trapping-rain-water-ii) | [接雨水 II](/solution/0400-0499/0407.Trapping%20Rain%20Water%20II/README.md) | `广度优先搜索`,`数组`,`矩阵`,`堆（优先队列）` | 困难 | | | [0408](https://leetcode-cn.com/problems/valid-word-abbreviation) | [有效单词缩写](/solution/0400-0499/0408.Valid%20Word%20Abbreviation/README.md) | `双指针`,`字符串` | 简单 | 🔒 | | [0409](https://leetcode-cn.com/problems/longest-palindrome) | [最长回文串](/solution/0400-0499/0409.Longest%20Palindrome/README.md) | `贪心`,`哈希表`,`字符串` | 简单 | | | [0410](https://leetcode-cn.com/problems/split-array-largest-sum) | [分割数组的最大值](/solution/0400-0499/0410.Split%20Array%20Largest%20Sum/README.md) | `贪心`,`数组`,`二分查找`,`动态规划` | 困难 | | | [0411](https://leetcode-cn.com/problems/minimum-unique-word-abbreviation) | [最短独占单词缩写](/solution/0400-0499/0411.Minimum%20Unique%20Word%20Abbreviation/README.md) | `位运算`,`字符串`,`回溯` | 困难 | 🔒 | | [0412](https://leetcode-cn.com/problems/fizz-buzz) | [Fizz Buzz](/solution/0400-0499/0412.Fizz%20Buzz/README.md) | `数学`,`字符串`,`模拟` | 简单 | | | [0413](https://leetcode-cn.com/problems/arithmetic-slices) | [等差数列划分](/solution/0400-0499/0413.Arithmetic%20Slices/README.md) | `数组`,`动态规划` | 中等 | | | [0414](https://leetcode-cn.com/problems/third-maximum-number) | [第三大的数](/solution/0400-0499/0414.Third%20Maximum%20Number/README.md) | `数组`,`排序` | 简单 | | | [0415](https://leetcode-cn.com/problems/add-strings) | [字符串相加](/solution/0400-0499/0415.Add%20Strings/README.md) | `数学`,`字符串`,`模拟` | 简单 | | | [0416](https://leetcode-cn.com/problems/partition-equal-subset-sum) | [分割等和子集](/solution/0400-0499/0416.Partition%20Equal%20Subset%20Sum/README.md) | `数组`,`动态规划` | 中等 | | | [0417](https://leetcode-cn.com/problems/pacific-atlantic-water-flow) | [太平洋大西洋水流问题](/solution/0400-0499/0417.Pacific%20Atlantic%20Water%20Flow/README.md) | `深度优先搜索`,`广度优先搜索`,`数组`,`矩阵` | 中等 | | | [0418](https://leetcode-cn.com/problems/sentence-screen-fitting) | [屏幕可显示句子的数量](/solution/0400-0499/0418.Sentence%20Screen%20Fitting/README.md) | `字符串`,`动态规划`,`模拟` | 中等 | 🔒 | | [0419](https://leetcode-cn.com/problems/battleships-in-a-board) | [甲板上的战舰](/solution/0400-0499/0419.Battleships%20in%20a%20Board/README.md) | `深度优先搜索`,`数组`,`矩阵` | 中等 | | | [0420](https://leetcode-cn.com/problems/strong-password-checker) | [强密码检验器](/solution/0400-0499/0420.Strong%20Password%20Checker/README.md) | `贪心`,`字符串`,`堆（优先队列）` | 困难 | | | [0421](https://leetcode-cn.com/problems/maximum-xor-of-two-numbers-in-an-array) | [数组中两个数的最大异或值](/solution/0400-0499/0421.Maximum%20XOR%20of%20Two%20Numbers%20in%20an%20Array/README.md) | `位运算`,`字典树`,`数组`,`哈希表` | 中等 | | | [0422](https://leetcode-cn.com/problems/valid-word-square) | [有效的单词方块](/solution/0400-0499/0422.Valid%20Word%20Square/README.md) | `数组`,`矩阵` | 简单 | 🔒 | | [0423](https://leetcode-cn.com/problems/reconstruct-original-digits-from-english) | [从英文中重建数字](/solution/0400-0499/0423.Reconstruct%20Original%20Digits%20from%20English/README.md) | `哈希表`,`数学`,`字符串` | 中等 | | | [0424](https://leetcode-cn.com/problems/longest-repeating-character-replacement) | [替换后的最长重复字符](/solution/0400-0499/0424.Longest%20Repeating%20Character%20Replacement/README.md) | `哈希表`,`字符串`,`滑动窗口` | 中等 | | | [0425](https://leetcode-cn.com/problems/word-squares) | [单词方块](/solution/0400-0499/0425.Word%20Squares/README.md) | `字典树`,`数组`,`字符串`,`回溯` | 困难 | 🔒 | | [0426](https://leetcode-cn.com/problems/convert-binary-search-tree-to-sorted-doubly-linked-list) | [将二叉搜索树转化为排序的双向链表](/solution/0400-0499/0426.Convert%20Binary%20Search%20Tree%20to%20Sorted%20Doubly%20Linked%20List/README.md) | `栈`,`树`,`深度优先搜索`,`二叉搜索树`,`链表`,`二叉树`,`双向链表` | 中等 | 🔒 | | [0427](https://leetcode-cn.com/problems/construct-quad-tree) | [建立四叉树](/solution/0400-0499/0427.Construct%20Quad%20Tree/README.md) | `树`,`数组`,`分治`,`矩阵` | 中等 | | | [0428](https://leetcode-cn.com/problems/serialize-and-deserialize-n-ary-tree) | [序列化和反序列化 N 叉树](/solution/0400-0499/0428.Serialize%20and%20Deserialize%20N-ary%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`字符串` | 困难 | 🔒 | | [0429](https://leetcode-cn.com/problems/n-ary-tree-level-order-traversal) | [N 叉树的层序遍历](/solution/0400-0499/0429.N-ary%20Tree%20Level%20Order%20Traversal/README.md) | `树`,`广度优先搜索` | 中等 | | | [0430](https://leetcode-cn.com/problems/flatten-a-multilevel-doubly-linked-list) | [扁平化多级双向链表](/solution/0400-0499/0430.Flatten%20a%20Multilevel%20Doubly%20Linked%20List/README.md) | `深度优先搜索`,`链表`,`双向链表` | 中等 | | | [0431](https://leetcode-cn.com/problems/encode-n-ary-tree-to-binary-tree) | [将 N 叉树编码为二叉树](/solution/0400-0499/0431.Encode%20N-ary%20Tree%20to%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`设计`,`二叉树` | 困难 | 🔒 | | [0432](https://leetcode-cn.com/problems/all-oone-data-structure) | [全 O(1) 的数据结构](/solution/0400-0499/0432.All%20O%60one%20Data%20Structure/README.md) | `设计`,`哈希表`,`链表`,`双向链表` | 困难 | | | [0433](https://leetcode-cn.com/problems/minimum-genetic-mutation) | [最小基因变化](/solution/0400-0499/0433.Minimum%20Genetic%20Mutation/README.md) | `广度优先搜索`,`哈希表`,`字符串` | 中等 | | | [0434](https://leetcode-cn.com/problems/number-of-segments-in-a-string) | [字符串中的单词数](/solution/0400-0499/0434.Number%20of%20Segments%20in%20a%20String/README.md) | `字符串` | 简单 | | | [0435](https://leetcode-cn.com/problems/non-overlapping-intervals) | [无重叠区间](/solution/0400-0499/0435.Non-overlapping%20Intervals/README.md) | `贪心`,`数组`,`动态规划`,`排序` | 中等 | | | [0436](https://leetcode-cn.com/problems/find-right-interval) | [寻找右区间](/solution/0400-0499/0436.Find%20Right%20Interval/README.md) | `数组`,`二分查找`,`排序` | 中等 | | | [0437](https://leetcode-cn.com/problems/path-sum-iii) | [路径总和 III](/solution/0400-0499/0437.Path%20Sum%20III/README.md) | `树`,`深度优先搜索`,`二叉树` | 中等 | | | [0438](https://leetcode-cn.com/problems/find-all-anagrams-in-a-string) | [找到字符串中所有字母异位词](/solution/0400-0499/0438.Find%20All%20Anagrams%20in%20a%20String/README.md) | `哈希表`,`字符串`,`滑动窗口` | 中等 | | | [0439](https://leetcode-cn.com/problems/ternary-expression-parser) | [三元表达式解析器](/solution/0400-0499/0439.Ternary%20Expression%20Parser/README.md) | `栈`,`递归`,`字符串` | 中等 | 🔒 | | [0440](https://leetcode-cn.com/problems/k-th-smallest-in-lexicographical-order) | [字典序的第 K 小数字](/solution/0400-0499/0440.K-th%20Smallest%20in%20Lexicographical%20Order/README.md) | `字典树` | 困难 | | | [0441](https://leetcode-cn.com/problems/arranging-coins) | [排列硬币](/solution/0400-0499/0441.Arranging%20Coins/README.md) | `数学`,`二分查找` | 简单 | | | [0442](https://leetcode-cn.com/problems/find-all-duplicates-in-an-array) | [数组中重复的数据](/solution/0400-0499/0442.Find%20All%20Duplicates%20in%20an%20Array/README.md) | `数组`,`哈希表` | 中等 | | | [0443](https://leetcode-cn.com/problems/string-compression) | [压缩字符串](/solution/0400-0499/0443.String%20Compression/README.md) | `双指针`,`字符串` | 中等 | | | [0444](https://leetcode-cn.com/problems/sequence-reconstruction) | [序列重建](/solution/0400-0499/0444.Sequence%20Reconstruction/README.md) | `图`,`拓扑排序`,`数组` | 中等 | 🔒 | | [0445](https://leetcode-cn.com/problems/add-two-numbers-ii) | [两数相加 II](/solution/0400-0499/0445.Add%20Two%20Numbers%20II/README.md) | `栈`,`链表`,`数学` | 中等 | | | [0446](https://leetcode-cn.com/problems/arithmetic-slices-ii-subsequence) | [等差数列划分 II - 子序列](/solution/0400-0499/0446.Arithmetic%20Slices%20II%20-%20Subsequence/README.md) | `数组`,`动态规划` | 困难 | | | [0447](https://leetcode-cn.com/problems/number-of-boomerangs) | [回旋镖的数量](/solution/0400-0499/0447.Number%20of%20Boomerangs/README.md) | `数组`,`哈希表`,`数学` | 中等 | | | [0448](https://leetcode-cn.com/problems/find-all-numbers-disappeared-in-an-array) | [找到所有数组中消失的数字](/solution/0400-0499/0448.Find%20All%20Numbers%20Disappeared%20in%20an%20Array/README.md) | `数组`,`哈希表` | 简单 | | | [0449](https://leetcode-cn.com/problems/serialize-and-deserialize-bst) | [序列化和反序列化二叉搜索树](/solution/0400-0499/0449.Serialize%20and%20Deserialize%20BST/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`设计`,`二叉搜索树`,`字符串`,`二叉树` | 中等 | | | [0450](https://leetcode-cn.com/problems/delete-node-in-a-bst) | [删除二叉搜索树中的节点](/solution/0400-0499/0450.Delete%20Node%20in%20a%20BST/README.md) | `树`,`二叉搜索树`,`二叉树` | 中等 | | | [0451](https://leetcode-cn.com/problems/sort-characters-by-frequency) | [根据字符出现频率排序](/solution/0400-0499/0451.Sort%20Characters%20By%20Frequency/README.md) | `哈希表`,`字符串`,`桶排序`,`计数`,`排序`,`堆（优先队列）` | 中等 | | | [0452](https://leetcode-cn.com/problems/minimum-number-of-arrows-to-burst-balloons) | [用最少数量的箭引爆气球](/solution/0400-0499/0452.Minimum%20Number%20of%20Arrows%20to%20Burst%20Balloons/README.md) | `贪心`,`数组`,`排序` | 中等 | | | [0453](https://leetcode-cn.com/problems/minimum-moves-to-equal-array-elements) | [最小操作次数使数组元素相等](/solution/0400-0499/0453.Minimum%20Moves%20to%20Equal%20Array%20Elements/README.md) | `数组`,`数学` | 简单 | | | [0454](https://leetcode-cn.com/problems/4sum-ii) | [四数相加 II](/solution/0400-0499/0454.4Sum%20II/README.md) | `数组`,`哈希表` | 中等 | | | [0455](https://leetcode-cn.com/problems/assign-cookies) | [分发饼干](/solution/0400-0499/0455.Assign%20Cookies/README.md) | `贪心`,`数组`,`排序` | 简单 | | | [0456](https://leetcode-cn.com/problems/132-pattern) | [132 模式](/solution/0400-0499/0456.132%20Pattern/README.md) | `栈`,`数组`,`二分查找`,`有序集合`,`单调栈` | 中等 | | | [0457](https://leetcode-cn.com/problems/circular-array-loop) | [环形数组是否存在循环](/solution/0400-0499/0457.Circular%20Array%20Loop/README.md) | `数组`,`哈希表`,`双指针` | 中等 | | | [0458](https://leetcode-cn.com/problems/poor-pigs) | [可怜的小猪](/solution/0400-0499/0458.Poor%20Pigs/README.md) | `数学`,`动态规划`,`组合数学` | 困难 | | | [0459](https://leetcode-cn.com/problems/repeated-substring-pattern) | [重复的子字符串](/solution/0400-0499/0459.Repeated%20Substring%20Pattern/README.md) | `字符串`,`字符串匹配` | 简单 | | | [0460](https://leetcode-cn.com/problems/lfu-cache) | [LFU 缓存](/solution/0400-0499/0460.LFU%20Cache/README.md) | `设计`,`哈希表`,`链表`,`双向链表` | 困难 | | | [0461](https://leetcode-cn.com/problems/hamming-distance) | [汉明距离](/solution/0400-0499/0461.Hamming%20Distance/README.md) | `位运算` | 简单 | | | [0462](https://leetcode-cn.com/problems/minimum-moves-to-equal-array-elements-ii) | [最少移动次数使数组元素相等 II](/solution/0400-0499/0462.Minimum%20Moves%20to%20Equal%20Array%20Elements%20II/README.md) | `数组`,`数学`,`排序` | 中等 | | | [0463](https://leetcode-cn.com/problems/island-perimeter) | [岛屿的周长](/solution/0400-0499/0463.Island%20Perimeter/README.md) | `深度优先搜索`,`广度优先搜索`,`数组`,`矩阵` | 简单 | | | [0464](https://leetcode-cn.com/problems/can-i-win) | [我能赢吗](/solution/0400-0499/0464.Can%20I%20Win/README.md) | `位运算`,`记忆化搜索`,`数学`,`动态规划`,`状态压缩`,`博弈` | 中等 | | | [0465](https://leetcode-cn.com/problems/optimal-account-balancing) | [最优账单平衡](/solution/0400-0499/0465.Optimal%20Account%20Balancing/README.md) | `数组`,`回溯` | 困难 | 🔒 | | [0466](https://leetcode-cn.com/problems/count-the-repetitions) | [统计重复个数](/solution/0400-0499/0466.Count%20The%20Repetitions/README.md) | `字符串`,`动态规划` | 困难 | | | [0467](https://leetcode-cn.com/problems/unique-substrings-in-wraparound-string) | [环绕字符串中唯一的子字符串](/solution/0400-0499/0467.Unique%20Substrings%20in%20Wraparound%20String/README.md) | `字符串`,`动态规划` | 中等 | | | [0468](https://leetcode-cn.com/problems/validate-ip-address) | [验证 IP 地址](/solution/0400-0499/0468.Validate%20IP%20Address/README.md) | `字符串` | 中等 | | | [0469](https://leetcode-cn.com/problems/convex-polygon) | [凸多边形](/solution/0400-0499/0469.Convex%20Polygon/README.md) | `几何`,`数学` | 中等 | 🔒 | | [0470](https://leetcode-cn.com/problems/implement-rand10-using-rand7) | [用 Rand7() 实现 Rand10()](/solution/0400-0499/0470.Implement%20Rand10%28%29%20Using%20Rand7%28%29/README.md) | `数学`,`拒绝采样`,`概率与统计`,`随机化` | 中等 | | | [0471](https://leetcode-cn.com/problems/encode-string-with-shortest-length) | [编码最短长度的字符串](/solution/0400-0499/0471.Encode%20String%20with%20Shortest%20Length/README.md) | `字符串`,`动态规划` | 困难 | 🔒 | | [0472](https://leetcode-cn.com/problems/concatenated-words) | [连接词](/solution/0400-0499/0472.Concatenated%20Words/README.md) | `深度优先搜索`,`字典树`,`数组`,`字符串`,`动态规划` | 困难 | | | [0473](https://leetcode-cn.com/problems/matchsticks-to-square) | [火柴拼正方形](/solution/0400-0499/0473.Matchsticks%20to%20Square/README.md) | `位运算`,`数组`,`动态规划`,`回溯`,`状态压缩` | 中等 | | | [0474](https://leetcode-cn.com/problems/ones-and-zeroes) | [一和零](/solution/0400-0499/0474.Ones%20and%20Zeroes/README.md) | `数组`,`字符串`,`动态规划` | 中等 | | | [0475](https://leetcode-cn.com/problems/heaters) | [供暖器](/solution/0400-0499/0475.Heaters/README.md) | `数组`,`双指针`,`二分查找`,`排序` | 中等 | | | [0476](https://leetcode-cn.com/problems/number-complement) | [数字的补数](/solution/0400-0499/0476.Number%20Complement/README.md) | `位运算` | 简单 | | | [0477](https://leetcode-cn.com/problems/total-hamming-distance) | [汉明距离总和](/solution/0400-0499/0477.Total%20Hamming%20Distance/README.md) | `位运算`,`数组`,`数学` | 中等 | | | [0478](https://leetcode-cn.com/problems/generate-random-point-in-a-circle) | [在圆内随机生成点](/solution/0400-0499/0478.Generate%20Random%20Point%20in%20a%20Circle/README.md) | `几何`,`数学`,`拒绝采样`,`随机化` | 中等 | | | [0479](https://leetcode-cn.com/problems/largest-palindrome-product) | [最大回文数乘积](/solution/0400-0499/0479.Largest%20Palindrome%20Product/README.md) | `数学` | 困难 | | | [0480](https://leetcode-cn.com/problems/sliding-window-median) | [滑动窗口中位数](/solution/0400-0499/0480.Sliding%20Window%20Median/README.md) | `数组`,`哈希表`,`滑动窗口`,`堆（优先队列）` | 困难 | | | [0481](https://leetcode-cn.com/problems/magical-string) | [神奇字符串](/solution/0400-0499/0481.Magical%20String/README.md) | `双指针`,`字符串` | 中等 | | | [0482](https://leetcode-cn.com/problems/license-key-formatting) | [密钥格式化](/solution/0400-0499/0482.License%20Key%20Formatting/README.md) | `字符串` | 简单 | | | [0483](https://leetcode-cn.com/problems/smallest-good-base) | [最小好进制](/solution/0400-0499/0483.Smallest%20Good%20Base/README.md) | `数学`,`二分查找` | 困难 | | | [0484](https://leetcode-cn.com/problems/find-permutation) | [寻找排列](/solution/0400-0499/0484.Find%20Permutation/README.md) | `栈`,`贪心`,`数组` | 中等 | 🔒 | | [0485](https://leetcode-cn.com/problems/max-consecutive-ones) | [最大连续 1 的个数](/solution/0400-0499/0485.Max%20Consecutive%20Ones/README.md) | `数组` | 简单 | | | [0486](https://leetcode-cn.com/problems/predict-the-winner) | [预测赢家](/solution/0400-0499/0486.Predict%20the%20Winner/README.md) | `递归`,`数组`,`数学`,`动态规划`,`博弈` | 中等 | | | [0487](https://leetcode-cn.com/problems/max-consecutive-ones-ii) | [最大连续 1 的个数 II](/solution/0400-0499/0487.Max%20Consecutive%20Ones%20II/README.md) | `数组`,`动态规划`,`滑动窗口` | 中等 | 🔒 | | [0488](https://leetcode-cn.com/problems/zuma-game) | [祖玛游戏](/solution/0400-0499/0488.Zuma%20Game/README.md) | `广度优先搜索`,`记忆化搜索`,`字符串`,`动态规划` | 困难 | | | [0489](https://leetcode-cn.com/problems/robot-room-cleaner) | [扫地机器人](/solution/0400-0499/0489.Robot%20Room%20Cleaner/README.md) | `回溯`,`交互` | 困难 | 🔒 | | [0490](https://leetcode-cn.com/problems/the-maze) | [迷宫](/solution/0400-0499/0490.The%20Maze/README.md) | `深度优先搜索`,`广度优先搜索`,`图` | 中等 | 🔒 | | [0491](https://leetcode-cn.com/problems/increasing-subsequences) | [递增子序列](/solution/0400-0499/0491.Increasing%20Subsequences/README.md) | `位运算`,`数组`,`哈希表`,`回溯` | 中等 | | | [0492](https://leetcode-cn.com/problems/construct-the-rectangle) | [构造矩形](/solution/0400-0499/0492.Construct%20the%20Rectangle/README.md) | `数学` | 简单 | | | [0493](https://leetcode-cn.com/problems/reverse-pairs) | [翻转对](/solution/0400-0499/0493.Reverse%20Pairs/README.md) | `树状数组`,`线段树`,`数组`,`二分查找`,`分治`,`有序集合`,`归并排序` | 困难 | | | [0494](https://leetcode-cn.com/problems/target-sum) | [目标和](/solution/0400-0499/0494.Target%20Sum/README.md) | `数组`,`动态规划`,`回溯` | 中等 | | | [0495](https://leetcode-cn.com/problems/teemo-attacking) | [提莫攻击](/solution/0400-0499/0495.Teemo%20Attacking/README.md) | `数组`,`模拟` | 简单 | | | [0496](https://leetcode-cn.com/problems/next-greater-element-i) | [下一个更大元素 I](/solution/0400-0499/0496.Next%20Greater%20Element%20I/README.md) | `栈`,`数组`,`哈希表`,`单调栈` | 简单 | | | [0497](https://leetcode-cn.com/problems/random-point-in-non-overlapping-rectangles) | [非重叠矩形中的随机点](/solution/0400-0499/0497.Random%20Point%20in%20Non-overlapping%20Rectangles/README.md) | `水塘抽样`,`数学`,`二分查找`,`有序集合`,`前缀和`,`随机化` | 中等 | | | [0498](https://leetcode-cn.com/problems/diagonal-traverse) | [对角线遍历](/solution/0400-0499/0498.Diagonal%20Traverse/README.md) | `数组`,`矩阵`,`模拟` | 中等 | | | [0499](https://leetcode-cn.com/problems/the-maze-iii) | [迷宫 III](/solution/0400-0499/0499.The%20Maze%20III/README.md) | `深度优先搜索`,`广度优先搜索`,`图`,`最短路`,`堆（优先队列）` | 困难 | 🔒 | | [0500](https://leetcode-cn.com/problems/keyboard-row) | [键盘行](/solution/0500-0599/0500.Keyboard%20Row/README.md) | `数组`,`哈希表`,`字符串` | 简单 | | | [0501](https://leetcode-cn.com/problems/find-mode-in-binary-search-tree) | [二叉搜索树中的众数](/solution/0500-0599/0501.Find%20Mode%20in%20Binary%20Search%20Tree/README.md) | `树`,`深度优先搜索`,`二叉搜索树`,`二叉树` | 简单 | | | [0502](https://leetcode-cn.com/problems/ipo) | [IPO](/solution/0500-0599/0502.IPO/README.md) | `贪心`,`数组`,`排序`,`堆（优先队列）` | 困难 | | | [0503](https://leetcode-cn.com/problems/next-greater-element-ii) | [下一个更大元素 II](/solution/0500-0599/0503.Next%20Greater%20Element%20II/README.md) | `栈`,`数组`,`单调栈` | 中等 | | | [0504](https://leetcode-cn.com/problems/base-7) | [七进制数](/solution/0500-0599/0504.Base%207/README.md) | `数学` | 简单 | | | [0505](https://leetcode-cn.com/problems/the-maze-ii) | [迷宫 II](/solution/0500-0599/0505.The%20Maze%20II/README.md) | `深度优先搜索`,`广度优先搜索`,`图`,`最短路`,`堆（优先队列）` | 中等 | 🔒 | | [0506](https://leetcode-cn.com/problems/relative-ranks) | [相对名次](/solution/0500-0599/0506.Relative%20Ranks/README.md) | `数组`,`排序`,`堆（优先队列）` | 简单 | | | [0507](https://leetcode-cn.com/problems/perfect-number) | [完美数](/solution/0500-0599/0507.Perfect%20Number/README.md) | `数学` | 简单 | | | [0508](https://leetcode-cn.com/problems/most-frequent-subtree-sum) | [出现次数最多的子树元素和](/solution/0500-0599/0508.Most%20Frequent%20Subtree%20Sum/README.md) | `树`,`深度优先搜索`,`哈希表`,`二叉树` | 中等 | | | [0509](https://leetcode-cn.com/problems/fibonacci-number) | [斐波那契数](/solution/0500-0599/0509.Fibonacci%20Number/README.md) | `递归`,`记忆化搜索`,`数学`,`动态规划` | 简单 | | | [0510](https://leetcode-cn.com/problems/inorder-successor-in-bst-ii) | [二叉搜索树中的中序后继 II](/solution/0500-0599/0510.Inorder%20Successor%20in%20BST%20II/README.md) | `树`,`二叉搜索树`,`二叉树` | 中等 | 🔒 | | [0511](https://leetcode-cn.com/problems/game-play-analysis-i) | [游戏玩法分析 I](/solution/0500-0599/0511.Game%20Play%20Analysis%20I/README.md) | `数据库` | 简单 | | | [0512](https://leetcode-cn.com/problems/game-play-analysis-ii) | [游戏玩法分析 II](/solution/0500-0599/0512.Game%20Play%20Analysis%20II/README.md) | `数据库` | 简单 | 🔒 | | [0513](https://leetcode-cn.com/problems/find-bottom-left-tree-value) | [找树左下角的值](/solution/0500-0599/0513.Find%20Bottom%20Left%20Tree%20Value/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉树` | 中等 | | | [0514](https://leetcode-cn.com/problems/freedom-trail) | [自由之路](/solution/0500-0599/0514.Freedom%20Trail/README.md) | `深度优先搜索`,`广度优先搜索`,`字符串`,`动态规划` | 困难 | | | [0515](https://leetcode-cn.com/problems/find-largest-value-in-each-tree-row) | [在每个树行中找最大值](/solution/0500-0599/0515.Find%20Largest%20Value%20in%20Each%20Tree%20Row/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉树` | 中等 | | | [0516](https://leetcode-cn.com/problems/longest-palindromic-subsequence) | [最长回文子序列](/solution/0500-0599/0516.Longest%20Palindromic%20Subsequence/README.md) | `字符串`,`动态规划` | 中等 | | | [0517](https://leetcode-cn.com/problems/super-washing-machines) | [超级洗衣机](/solution/0500-0599/0517.Super%20Washing%20Machines/README.md) | `贪心`,`数组` | 困难 | | | [0518](https://leetcode-cn.com/problems/coin-change-2) | [零钱兑换 II](/solution/0500-0599/0518.Coin%20Change%202/README.md) | `数组`,`动态规划` | 中等 | | | [0519](https://leetcode-cn.com/problems/random-flip-matrix) | [随机翻转矩阵](/solution/0500-0599/0519.Random%20Flip%20Matrix/README.md) | `水塘抽样`,`哈希表`,`数学`,`随机化` | 中等 | | | [0520](https://leetcode-cn.com/problems/detect-capital) | [检测大写字母](/solution/0500-0599/0520.Detect%20Capital/README.md) | `字符串` | 简单 | | | [0521](https://leetcode-cn.com/problems/longest-uncommon-subsequence-i) | [最长特殊序列 Ⅰ](/solution/0500-0599/0521.Longest%20Uncommon%20Subsequence%20I/README.md) | `字符串` | 简单 | | | [0522](https://leetcode-cn.com/problems/longest-uncommon-subsequence-ii) | [最长特殊序列 II](/solution/0500-0599/0522.Longest%20Uncommon%20Subsequence%20II/README.md) | `数组`,`哈希表`,`双指针`,`字符串`,`排序` | 中等 | | | [0523](https://leetcode-cn.com/problems/continuous-subarray-sum) | [连续的子数组和](/solution/0500-0599/0523.Continuous%20Subarray%20Sum/README.md) | `数组`,`哈希表`,`数学`,`前缀和` | 中等 | | | [0524](https://leetcode-cn.com/problems/longest-word-in-dictionary-through-deleting) | [通过删除字母匹配到字典里最长单词](/solution/0500-0599/0524.Longest%20Word%20in%20Dictionary%20through%20Deleting/README.md) | `数组`,`双指针`,`字符串`,`排序` | 中等 | | | [0525](https://leetcode-cn.com/problems/contiguous-array) | [连续数组](/solution/0500-0599/0525.Contiguous%20Array/README.md) | `数组`,`哈希表`,`前缀和` | 中等 | | | [0526](https://leetcode-cn.com/problems/beautiful-arrangement) | [优美的排列](/solution/0500-0599/0526.Beautiful%20Arrangement/README.md) | `位运算`,`数组`,`动态规划`,`回溯`,`状态压缩` | 中等 | | | [0527](https://leetcode-cn.com/problems/word-abbreviation) | [单词缩写](/solution/0500-0599/0527.Word%20Abbreviation/README.md) | `贪心`,`字典树`,`数组`,`字符串`,`排序` | 困难 | 🔒 | | [0528](https://leetcode-cn.com/problems/random-pick-with-weight) | [按权重随机选择](/solution/0500-0599/0528.Random%20Pick%20with%20Weight/README.md) | `数学`,`二分查找`,`前缀和`,`随机化` | 中等 | | | [0529](https://leetcode-cn.com/problems/minesweeper) | [扫雷游戏](/solution/0500-0599/0529.Minesweeper/README.md) | `深度优先搜索`,`广度优先搜索`,`数组`,`矩阵` | 中等 | | | [0530](https://leetcode-cn.com/problems/minimum-absolute-difference-in-bst) | [二叉搜索树的最小绝对差](/solution/0500-0599/0530.Minimum%20Absolute%20Difference%20in%20BST/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉搜索树`,`二叉树` | 简单 | | | [0531](https://leetcode-cn.com/problems/lonely-pixel-i) | [孤独像素 I](/solution/0500-0599/0531.Lonely%20Pixel%20I/README.md) | `数组`,`哈希表`,`矩阵` | 中等 | 🔒 | | [0532](https://leetcode-cn.com/problems/k-diff-pairs-in-an-array) | [数组中的 k-diff 数对](/solution/0500-0599/0532.K-diff%20Pairs%20in%20an%20Array/README.md) | `数组`,`哈希表`,`双指针`,`二分查找`,`排序` | 中等 | | | [0533](https://leetcode-cn.com/problems/lonely-pixel-ii) | [孤独像素 II](/solution/0500-0599/0533.Lonely%20Pixel%20II/README.md) | `数组`,`哈希表`,`矩阵` | 中等 | 🔒 | | [0534](https://leetcode-cn.com/problems/game-play-analysis-iii) | [游戏玩法分析 III](/solution/0500-0599/0534.Game%20Play%20Analysis%20III/README.md) | `数据库` | 中等 | 🔒 | | [0535](https://leetcode-cn.com/problems/encode-and-decode-tinyurl) | [TinyURL 的加密与解密](/solution/0500-0599/0535.Encode%20and%20Decode%20TinyURL/README.md) | `设计`,`哈希表`,`字符串`,`哈希函数` | 中等 | | | [0536](https://leetcode-cn.com/problems/construct-binary-tree-from-string) | [从字符串生成二叉树](/solution/0500-0599/0536.Construct%20Binary%20Tree%20from%20String/README.md) | `树`,`深度优先搜索`,`字符串`,`二叉树` | 中等 | 🔒 | | [0537](https://leetcode-cn.com/problems/complex-number-multiplication) | [复数乘法](/solution/0500-0599/0537.Complex%20Number%20Multiplication/README.md) | `数学`,`字符串`,`模拟` | 中等 | | | [0538](https://leetcode-cn.com/problems/convert-bst-to-greater-tree) | [把二叉搜索树转换为累加树](/solution/0500-0599/0538.Convert%20BST%20to%20Greater%20Tree/README.md) | `树`,`深度优先搜索`,`二叉搜索树`,`二叉树` | 中等 | | | [0539](https://leetcode-cn.com/problems/minimum-time-difference) | [最小时间差](/solution/0500-0599/0539.Minimum%20Time%20Difference/README.md) | `数组`,`数学`,`字符串`,`排序` | 中等 | | | [0540](https://leetcode-cn.com/problems/single-element-in-a-sorted-array) | [有序数组中的单一元素](/solution/0500-0599/0540.Single%20Element%20in%20a%20Sorted%20Array/README.md) | `数组`,`二分查找` | 中等 | | | [0541](https://leetcode-cn.com/problems/reverse-string-ii) | [反转字符串 II](/solution/0500-0599/0541.Reverse%20String%20II/README.md) | `双指针`,`字符串` | 简单 | | | [0542](https://leetcode-cn.com/problems/01-matrix) | [01 矩阵](/solution/0500-0599/0542.01%20Matrix/README.md) | `广度优先搜索`,`数组`,`动态规划`,`矩阵` | 中等 | | | [0543](https://leetcode-cn.com/problems/diameter-of-binary-tree) | [二叉树的直径](/solution/0500-0599/0543.Diameter%20of%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`二叉树` | 简单 | | | [0544](https://leetcode-cn.com/problems/output-contest-matches) | [输出比赛匹配对](/solution/0500-0599/0544.Output%20Contest%20Matches/README.md) | `递归`,`字符串`,`模拟` | 中等 | 🔒 | | [0545](https://leetcode-cn.com/problems/boundary-of-binary-tree) | [二叉树的边界](/solution/0500-0599/0545.Boundary%20of%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`二叉树` | 中等 | 🔒 | | [0546](https://leetcode-cn.com/problems/remove-boxes) | [移除盒子](/solution/0500-0599/0546.Remove%20Boxes/README.md) | `记忆化搜索`,`数组`,`动态规划` | 困难 | | | [0547](https://leetcode-cn.com/problems/number-of-provinces) | [省份数量](/solution/0500-0599/0547.Number%20of%20Provinces/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`图` | 中等 | | | [0548](https://leetcode-cn.com/problems/split-array-with-equal-sum) | [将数组分割成和相等的子数组](/solution/0500-0599/0548.Split%20Array%20with%20Equal%20Sum/README.md) | `数组`,`前缀和` | 困难 | 🔒 | | [0549](https://leetcode-cn.com/problems/binary-tree-longest-consecutive-sequence-ii) | [二叉树中最长的连续序列](/solution/0500-0599/0549.Binary%20Tree%20Longest%20Consecutive%20Sequence%20II/README.md) | `树`,`深度优先搜索`,`二叉树` | 中等 | 🔒 | | [0550](https://leetcode-cn.com/problems/game-play-analysis-iv) | [游戏玩法分析 IV](/solution/0500-0599/0550.Game%20Play%20Analysis%20IV/README.md) | `数据库` | 中等 | 🔒 | | [0551](https://leetcode-cn.com/problems/student-attendance-record-i) | [学生出勤记录 I](/solution/0500-0599/0551.Student%20Attendance%20Record%20I/README.md) | `字符串` | 简单 | | | [0552](https://leetcode-cn.com/problems/student-attendance-record-ii) | [学生出勤记录 II](/solution/0500-0599/0552.Student%20Attendance%20Record%20II/README.md) | `动态规划` | 困难 | | | [0553](https://leetcode-cn.com/problems/optimal-division) | [最优除法](/solution/0500-0599/0553.Optimal%20Division/README.md) | `数组`,`数学`,`动态规划` | 中等 | | | [0554](https://leetcode-cn.com/problems/brick-wall) | [砖墙](/solution/0500-0599/0554.Brick%20Wall/README.md) | `数组`,`哈希表` | 中等 | | | [0555](https://leetcode-cn.com/problems/split-concatenated-strings) | [分割连接字符串](/solution/0500-0599/0555.Split%20Concatenated%20Strings/README.md) | `贪心`,`数组`,`字符串` | 中等 | 🔒 | | [0556](https://leetcode-cn.com/problems/next-greater-element-iii) | [下一个更大元素 III](/solution/0500-0599/0556.Next%20Greater%20Element%20III/README.md) | `数学`,`双指针`,`字符串` | 中等 | | | [0557](https://leetcode-cn.com/problems/reverse-words-in-a-string-iii) | [反转字符串中的单词 III](/solution/0500-0599/0557.Reverse%20Words%20in%20a%20String%20III/README.md) | `双指针`,`字符串` | 简单 | | | [0558](https://leetcode-cn.com/problems/logical-or-of-two-binary-grids-represented-as-quad-trees) | [四叉树交集](/solution/0500-0599/0558.Logical%20OR%20of%20Two%20Binary%20Grids%20Represented%20as%20Quad-Trees/README.md) | `树`,`分治` | 中等 | | | [0559](https://leetcode-cn.com/problems/maximum-depth-of-n-ary-tree) | [N 叉树的最大深度](/solution/0500-0599/0559.Maximum%20Depth%20of%20N-ary%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索` | 简单 | | | [0560](https://leetcode-cn.com/problems/subarray-sum-equals-k) | [和为 K 的子数组](/solution/0500-0599/0560.Subarray%20Sum%20Equals%20K/README.md) | `数组`,`哈希表`,`前缀和` | 中等 | | | [0561](https://leetcode-cn.com/problems/array-partition-i) | [数组拆分 I](/solution/0500-0599/0561.Array%20Partition%20I/README.md) | `贪心`,`数组`,`计数排序`,`排序` | 简单 | | | [0562](https://leetcode-cn.com/problems/longest-line-of-consecutive-one-in-matrix) | [矩阵中最长的连续 1 线段](/solution/0500-0599/0562.Longest%20Line%20of%20Consecutive%20One%20in%20Matrix/README.md) | `数组`,`动态规划`,`矩阵` | 中等 | 🔒 | | [0563](https://leetcode-cn.com/problems/binary-tree-tilt) | [二叉树的坡度](/solution/0500-0599/0563.Binary%20Tree%20Tilt/README.md) | `树`,`深度优先搜索`,`二叉树` | 简单 | | | [0564](https://leetcode-cn.com/problems/find-the-closest-palindrome) | [寻找最近的回文数](/solution/0500-0599/0564.Find%20the%20Closest%20Palindrome/README.md) | `数学`,`字符串` | 困难 | | | [0565](https://leetcode-cn.com/problems/array-nesting) | [数组嵌套](/solution/0500-0599/0565.Array%20Nesting/README.md) | `深度优先搜索`,`数组` | 中等 | | | [0566](https://leetcode-cn.com/problems/reshape-the-matrix) | [重塑矩阵](/solution/0500-0599/0566.Reshape%20the%20Matrix/README.md) | `数组`,`矩阵`,`模拟` | 简单 | | | [0567](https://leetcode-cn.com/problems/permutation-in-string) | [字符串的排列](/solution/0500-0599/0567.Permutation%20in%20String/README.md) | `哈希表`,`双指针`,`字符串`,`滑动窗口` | 中等 | | | [0568](https://leetcode-cn.com/problems/maximum-vacation-days) | [最大休假天数](/solution/0500-0599/0568.Maximum%20Vacation%20Days/README.md) | `数组`,`动态规划`,`矩阵` | 困难 | 🔒 | | [0569](https://leetcode-cn.com/problems/median-employee-salary) | [员工薪水中位数](/solution/0500-0599/0569.Median%20Employee%20Salary/README.md) | `数据库` | 困难 | 🔒 | | [0570](https://leetcode-cn.com/problems/managers-with-at-least-5-direct-reports) | [至少有 5 名直接下属的经理](/solution/0500-0599/0570.Managers%20with%20at%20Least%205%20Direct%20Reports/README.md) | `数据库` | 中等 | 🔒 | | [0571](https://leetcode-cn.com/problems/find-median-given-frequency-of-numbers) | [给定数字的频率查询中位数](/solution/0500-0599/0571.Find%20Median%20Given%20Frequency%20of%20Numbers/README.md) | `数据库` | 困难 | 🔒 | | [0572](https://leetcode-cn.com/problems/subtree-of-another-tree) | [另一棵树的子树](/solution/0500-0599/0572.Subtree%20of%20Another%20Tree/README.md) | `树`,`深度优先搜索`,`二叉树`,`字符串匹配`,`哈希函数` | 简单 | | | [0573](https://leetcode-cn.com/problems/squirrel-simulation) | [松鼠模拟](/solution/0500-0599/0573.Squirrel%20Simulation/README.md) | `数组`,`数学` | 中等 | 🔒 | | [0574](https://leetcode-cn.com/problems/winning-candidate) | [当选者](/solution/0500-0599/0574.Winning%20Candidate/README.md) | `数据库` | 中等 | 🔒 | | [0575](https://leetcode-cn.com/problems/distribute-candies) | [分糖果](/solution/0500-0599/0575.Distribute%20Candies/README.md) | `数组`,`哈希表` | 简单 | | | [0576](https://leetcode-cn.com/problems/out-of-boundary-paths) | [出界的路径数](/solution/0500-0599/0576.Out%20of%20Boundary%20Paths/README.md) | `动态规划` | 中等 | | | [0577](https://leetcode-cn.com/problems/employee-bonus) | [员工奖金](/solution/0500-0599/0577.Employee%20Bonus/README.md) | `数据库` | 简单 | 🔒 | | [0578](https://leetcode-cn.com/problems/get-highest-answer-rate-question) | [查询回答率最高的问题](/solution/0500-0599/0578.Get%20Highest%20Answer%20Rate%20Question/README.md) | `数据库` | 中等 | 🔒 | | [0579](https://leetcode-cn.com/problems/find-cumulative-salary-of-an-employee) | [查询员工的累计薪水](/solution/0500-0599/0579.Find%20Cumulative%20Salary%20of%20an%20Employee/README.md) | `数据库` | 困难 | 🔒 | | [0580](https://leetcode-cn.com/problems/count-student-number-in-departments) | [统计各专业学生人数](/solution/0500-0599/0580.Count%20Student%20Number%20in%20Departments/README.md) | `数据库` | 中等 | 🔒 | | [0581](https://leetcode-cn.com/problems/shortest-unsorted-continuous-subarray) | [最短无序连续子数组](/solution/0500-0599/0581.Shortest%20Unsorted%20Continuous%20Subarray/README.md) | `栈`,`贪心`,`数组`,`双指针`,`排序`,`单调栈` | 中等 | | | [0582](https://leetcode-cn.com/problems/kill-process) | [杀掉进程](/solution/0500-0599/0582.Kill%20Process/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`数组`,`哈希表` | 中等 | 🔒 | | [0583](https://leetcode-cn.com/problems/delete-operation-for-two-strings) | [两个字符串的删除操作](/solution/0500-0599/0583.Delete%20Operation%20for%20Two%20Strings/README.md) | `字符串`,`动态规划` | 中等 | | | [0584](https://leetcode-cn.com/problems/find-customer-referee) | [寻找用户推荐人](/solution/0500-0599/0584.Find%20Customer%20Referee/README.md) | `数据库` | 简单 | | | [0585](https://leetcode-cn.com/problems/investments-in-2016) | [2016 年的投资](/solution/0500-0599/0585.Investments%20in%202016/README.md) | `数据库` | 中等 | 🔒 | | [0586](https://leetcode-cn.com/problems/customer-placing-the-largest-number-of-orders) | [订单最多的客户](/solution/0500-0599/0586.Customer%20Placing%20the%20Largest%20Number%20of%20Orders/README.md) | `数据库` | 简单 | | | [0587](https://leetcode-cn.com/problems/erect-the-fence) | [安装栅栏](/solution/0500-0599/0587.Erect%20the%20Fence/README.md) | `几何`,`数组`,`数学` | 困难 | | | [0588](https://leetcode-cn.com/problems/design-in-memory-file-system) | [设计内存文件系统](/solution/0500-0599/0588.Design%20In-Memory%20File%20System/README.md) | `设计`,`字典树`,`哈希表`,`字符串` | 困难 | 🔒 | | [0589](https://leetcode-cn.com/problems/n-ary-tree-preorder-traversal) | [N 叉树的前序遍历](/solution/0500-0599/0589.N-ary%20Tree%20Preorder%20Traversal/README.md) | `栈`,`树`,`深度优先搜索` | 简单 | | | [0590](https://leetcode-cn.com/problems/n-ary-tree-postorder-traversal) | [N 叉树的后序遍历](/solution/0500-0599/0590.N-ary%20Tree%20Postorder%20Traversal/README.md) | `栈`,`树`,`深度优先搜索` | 简单 | | | [0591](https://leetcode-cn.com/problems/tag-validator) | [标签验证器](/solution/0500-0599/0591.Tag%20Validator/README.md) | `栈`,`字符串` | 困难 | | | [0592](https://leetcode-cn.com/problems/fraction-addition-and-subtraction) | [分数加减运算](/solution/0500-0599/0592.Fraction%20Addition%20and%20Subtraction/README.md) | `数学`,`字符串`,`模拟` | 中等 | | | [0593](https://leetcode-cn.com/problems/valid-square) | [有效的正方形](/solution/0500-0599/0593.Valid%20Square/README.md) | `几何`,`数学` | 中等 | | | [0594](https://leetcode-cn.com/problems/longest-harmonious-subsequence) | [最长和谐子序列](/solution/0500-0599/0594.Longest%20Harmonious%20Subsequence/README.md) | `数组`,`哈希表`,`排序` | 简单 | | | [0595](https://leetcode-cn.com/problems/big-countries) | [大的国家](/solution/0500-0599/0595.Big%20Countries/README.md) | `数据库` | 简单 | | | [0596](https://leetcode-cn.com/problems/classes-more-than-5-students) | [超过 5 名学生的课](/solution/0500-0599/0596.Classes%20More%20Than%205%20Students/README.md) | `数据库` | 简单 | | | [0597](https://leetcode-cn.com/problems/friend-requests-i-overall-acceptance-rate) | [好友申请 I：总体通过率](/solution/0500-0599/0597.Friend%20Requests%20I%20Overall%20Acceptance%20Rate/README.md) | `数据库` | 简单 | 🔒 | | [0598](https://leetcode-cn.com/problems/range-addition-ii) | [范围求和 II](/solution/0500-0599/0598.Range%20Addition%20II/README.md) | `数组`,`数学` | 简单 | | | [0599](https://leetcode-cn.com/problems/minimum-index-sum-of-two-lists) | [两个列表的最小索引总和](/solution/0500-0599/0599.Minimum%20Index%20Sum%20of%20Two%20Lists/README.md) | `数组`,`哈希表`,`字符串` | 简单 | | | [0600](https://leetcode-cn.com/problems/non-negative-integers-without-consecutive-ones) | [不含连续 1 的非负整数](/solution/0600-0699/0600.Non-negative%20Integers%20without%20Consecutive%20Ones/README.md) | `动态规划` | 困难 | | | [0601](https://leetcode-cn.com/problems/human-traffic-of-stadium) | [体育馆的人流量](/solution/0600-0699/0601.Human%20Traffic%20of%20Stadium/README.md) | `数据库` | 困难 | | | [0602](https://leetcode-cn.com/problems/friend-requests-ii-who-has-the-most-friends) | [好友申请 II ：谁有最多的好友](/solution/0600-0699/0602.Friend%20Requests%20II%20Who%20Has%20the%20Most%20Friends/README.md) | `数据库` | 中等 | 🔒 | | [0603](https://leetcode-cn.com/problems/consecutive-available-seats) | [连续空余座位](/solution/0600-0699/0603.Consecutive%20Available%20Seats/README.md) | `数据库` | 简单 | 🔒 | | [0604](https://leetcode-cn.com/problems/design-compressed-string-iterator) | [迭代压缩字符串](/solution/0600-0699/0604.Design%20Compressed%20String%20Iterator/README.md) | `设计`,`数组`,`哈希表`,`字符串`,`迭代器` | 简单 | 🔒 | | [0605](https://leetcode-cn.com/problems/can-place-flowers) | [种花问题](/solution/0600-0699/0605.Can%20Place%20Flowers/README.md) | `贪心`,`数组` | 简单 | | | [0606](https://leetcode-cn.com/problems/construct-string-from-binary-tree) | [根据二叉树创建字符串](/solution/0600-0699/0606.Construct%20String%20from%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`字符串`,`二叉树` | 简单 | | | [0607](https://leetcode-cn.com/problems/sales-person) | [销售员](/solution/0600-0699/0607.Sales%20Person/README.md) | `数据库` | 简单 | | | [0608](https://leetcode-cn.com/problems/tree-node) | [树节点](/solution/0600-0699/0608.Tree%20Node/README.md) | `数据库` | 中等 | | | [0609](https://leetcode-cn.com/problems/find-duplicate-file-in-system) | [在系统中查找重复文件](/solution/0600-0699/0609.Find%20Duplicate%20File%20in%20System/README.md) | `数组`,`哈希表`,`字符串` | 中等 | | | [0610](https://leetcode-cn.com/problems/triangle-judgement) | [判断三角形](/solution/0600-0699/0610.Triangle%20Judgement/README.md) | `数据库` | 简单 | 🔒 | | [0611](https://leetcode-cn.com/problems/valid-triangle-number) | [有效三角形的个数](/solution/0600-0699/0611.Valid%20Triangle%20Number/README.md) | `贪心`,`数组`,`双指针`,`二分查找`,`排序` | 中等 | | | [0612](https://leetcode-cn.com/problems/shortest-distance-in-a-plane) | [平面上的最近距离](/solution/0600-0699/0612.Shortest%20Distance%20in%20a%20Plane/README.md) | `数据库` | 中等 | 🔒 | | [0613](https://leetcode-cn.com/problems/shortest-distance-in-a-line) | [直线上的最近距离](/solution/0600-0699/0613.Shortest%20Distance%20in%20a%20Line/README.md) | `数据库` | 简单 | 🔒 | | [0614](https://leetcode-cn.com/problems/second-degree-follower) | [二级关注者](/solution/0600-0699/0614.Second%20Degree%20Follower/README.md) | `数据库` | 中等 | 🔒 | | [0615](https://leetcode-cn.com/problems/average-salary-departments-vs-company) | [平均工资：部门与公司比较](/solution/0600-0699/0615.Average%20Salary%20Departments%20VS%20Company/README.md) | `数据库` | 困难 | 🔒 | | [0616](https://leetcode-cn.com/problems/add-bold-tag-in-string) | [给字符串添加加粗标签](/solution/0600-0699/0616.Add%20Bold%20Tag%20in%20String/README.md) | `字典树`,`数组`,`哈希表`,`字符串`,`字符串匹配` | 中等 | 🔒 | | [0617](https://leetcode-cn.com/problems/merge-two-binary-trees) | [合并二叉树](/solution/0600-0699/0617.Merge%20Two%20Binary%20Trees/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉树` | 简单 | | | [0618](https://leetcode-cn.com/problems/students-report-by-geography) | [学生地理信息报告](/solution/0600-0699/0618.Students%20Report%20By%20Geography/README.md) | `数据库` | 困难 | 🔒 | | [0619](https://leetcode-cn.com/problems/biggest-single-number) | [只出现一次的最大数字](/solution/0600-0699/0619.Biggest%20Single%20Number/README.md) | `数据库` | 简单 | 🔒 | | [0620](https://leetcode-cn.com/problems/not-boring-movies) | [有趣的电影](/solution/0600-0699/0620.Not%20Boring%20Movies/README.md) | `数据库` | 简单 | | | [0621](https://leetcode-cn.com/problems/task-scheduler) | [任务调度器](/solution/0600-0699/0621.Task%20Scheduler/README.md) | `贪心`,`数组`,`哈希表`,`计数`,`排序`,`堆（优先队列）` | 中等 | | | [0622](https://leetcode-cn.com/problems/design-circular-queue) | [设计循环队列](/solution/0600-0699/0622.Design%20Circular%20Queue/README.md) | `设计`,`队列`,`数组`,`链表` | 中等 | | | [0623](https://leetcode-cn.com/problems/add-one-row-to-tree) | [在二叉树中增加一行](/solution/0600-0699/0623.Add%20One%20Row%20to%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉树` | 中等 | | | [0624](https://leetcode-cn.com/problems/maximum-distance-in-arrays) | [数组列表中的最大距离](/solution/0600-0699/0624.Maximum%20Distance%20in%20Arrays/README.md) | `贪心`,`数组` | 中等 | 🔒 | | [0625](https://leetcode-cn.com/problems/minimum-factorization) | [最小因式分解](/solution/0600-0699/0625.Minimum%20Factorization/README.md) | `贪心`,`数学` | 中等 | 🔒 | | [0626](https://leetcode-cn.com/problems/exchange-seats) | [换座位](/solution/0600-0699/0626.Exchange%20Seats/README.md) | `数据库` | 中等 | | | [0627](https://leetcode-cn.com/problems/swap-salary) | [变更性别](/solution/0600-0699/0627.Swap%20Salary/README.md) | `数据库` | 简单 | | | [0628](https://leetcode-cn.com/problems/maximum-product-of-three-numbers) | [三个数的最大乘积](/solution/0600-0699/0628.Maximum%20Product%20of%20Three%20Numbers/README.md) | `数组`,`数学`,`排序` | 简单 | | | [0629](https://leetcode-cn.com/problems/k-inverse-pairs-array) | [K 个逆序对数组](/solution/0600-0699/0629.K%20Inverse%20Pairs%20Array/README.md) | `动态规划` | 困难 | | | [0630](https://leetcode-cn.com/problems/course-schedule-iii) | [课程表 III](/solution/0600-0699/0630.Course%20Schedule%20III/README.md) | `贪心`,`数组`,`堆（优先队列）` | 困难 | | | [0631](https://leetcode-cn.com/problems/design-excel-sum-formula) | [设计 Excel 求和公式](/solution/0600-0699/0631.Design%20Excel%20Sum%20Formula/README.md) | `图`,`设计`,`拓扑排序` | 困难 | 🔒 | | [0632](https://leetcode-cn.com/problems/smallest-range-covering-elements-from-k-lists) | [最小区间](/solution/0600-0699/0632.Smallest%20Range%20Covering%20Elements%20from%20K%20Lists/README.md) | `贪心`,`数组`,`哈希表`,`排序`,`滑动窗口`,`堆（优先队列）` | 困难 | | | [0633](https://leetcode-cn.com/problems/sum-of-square-numbers) | [平方数之和](/solution/0600-0699/0633.Sum%20of%20Square%20Numbers/README.md) | `数学`,`双指针`,`二分查找` | 中等 | | | [0634](https://leetcode-cn.com/problems/find-the-derangement-of-an-array) | [寻找数组的错位排列](/solution/0600-0699/0634.Find%20the%20Derangement%20of%20An%20Array/README.md) | `数学`,`动态规划` | 中等 | 🔒 | | [0635](https://leetcode-cn.com/problems/design-log-storage-system) | [设计日志存储系统](/solution/0600-0699/0635.Design%20Log%20Storage%20System/README.md) | `设计`,`哈希表`,`字符串`,`有序集合` | 中等 | 🔒 | | [0636](https://leetcode-cn.com/problems/exclusive-time-of-functions) | [函数的独占时间](/solution/0600-0699/0636.Exclusive%20Time%20of%20Functions/README.md) | `栈`,`数组` | 中等 | | | [0637](https://leetcode-cn.com/problems/average-of-levels-in-binary-tree) | [二叉树的层平均值](/solution/0600-0699/0637.Average%20of%20Levels%20in%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉树` | 简单 | | | [0638](https://leetcode-cn.com/problems/shopping-offers) | [大礼包](/solution/0600-0699/0638.Shopping%20Offers/README.md) | `位运算`,`记忆化搜索`,`数组`,`动态规划`,`回溯`,`状态压缩` | 中等 | | | [0639](https://leetcode-cn.com/problems/decode-ways-ii) | [解码方法 II](/solution/0600-0699/0639.Decode%20Ways%20II/README.md) | `字符串`,`动态规划` | 困难 | | | [0640](https://leetcode-cn.com/problems/solve-the-equation) | [求解方程](/solution/0600-0699/0640.Solve%20the%20Equation/README.md) | `数学`,`字符串`,`模拟` | 中等 | | | [0641](https://leetcode-cn.com/problems/design-circular-deque) | [设计循环双端队列](/solution/0600-0699/0641.Design%20Circular%20Deque/README.md) | `设计`,`队列`,`数组`,`链表` | 中等 | | | [0642](https://leetcode-cn.com/problems/design-search-autocomplete-system) | [设计搜索自动补全系统](/solution/0600-0699/0642.Design%20Search%20Autocomplete%20System/README.md) | `设计`,`字典树`,`字符串`,`数据流` | 困难 | 🔒 | | [0643](https://leetcode-cn.com/problems/maximum-average-subarray-i) | [子数组最大平均数 I](/solution/0600-0699/0643.Maximum%20Average%20Subarray%20I/README.md) | `数组`,`滑动窗口` | 简单 | | | [0644](https://leetcode-cn.com/problems/maximum-average-subarray-ii) | [子数组最大平均数 II](/solution/0600-0699/0644.Maximum%20Average%20Subarray%20II/README.md) | `数组`,`二分查找` | 困难 | 🔒 | | [0645](https://leetcode-cn.com/problems/set-mismatch) | [错误的集合](/solution/0600-0699/0645.Set%20Mismatch/README.md) | `位运算`,`数组`,`哈希表`,`排序` | 简单 | | | [0646](https://leetcode-cn.com/problems/maximum-length-of-pair-chain) | [最长数对链](/solution/0600-0699/0646.Maximum%20Length%20of%20Pair%20Chain/README.md) | `贪心`,`数组`,`动态规划`,`排序` | 中等 | | | [0647](https://leetcode-cn.com/problems/palindromic-substrings) | [回文子串](/solution/0600-0699/0647.Palindromic%20Substrings/README.md) | `字符串`,`动态规划` | 中等 | | | [0648](https://leetcode-cn.com/problems/replace-words) | [单词替换](/solution/0600-0699/0648.Replace%20Words/README.md) | `字典树`,`数组`,`哈希表`,`字符串` | 中等 | | | [0649](https://leetcode-cn.com/problems/dota2-senate) | [Dota2 参议院](/solution/0600-0699/0649.Dota2%20Senate/README.md) | `贪心`,`队列`,`字符串` | 中等 | | | [0650](https://leetcode-cn.com/problems/2-keys-keyboard) | [只有两个键的键盘](/solution/0600-0699/0650.2%20Keys%20Keyboard/README.md) | `数学`,`动态规划` | 中等 | | | [0651](https://leetcode-cn.com/problems/4-keys-keyboard) | [4 键键盘](/solution/0600-0699/0651.4%20Keys%20Keyboard/README.md) | `数学`,`动态规划` | 中等 | 🔒 | | [0652](https://leetcode-cn.com/problems/find-duplicate-subtrees) | [寻找重复的子树](/solution/0600-0699/0652.Find%20Duplicate%20Subtrees/README.md) | `树`,`深度优先搜索`,`哈希表`,`二叉树` | 中等 | | | [0653](https://leetcode-cn.com/problems/two-sum-iv-input-is-a-bst) | [两数之和 IV - 输入 BST](/solution/0600-0699/0653.Two%20Sum%20IV%20-%20Input%20is%20a%20BST/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉搜索树`,`哈希表`,`双指针`,`二叉树` | 简单 | | | [0654](https://leetcode-cn.com/problems/maximum-binary-tree) | [最大二叉树](/solution/0600-0699/0654.Maximum%20Binary%20Tree/README.md) | `栈`,`树`,`数组`,`分治`,`二叉树`,`单调栈` | 中等 | | | [0655](https://leetcode-cn.com/problems/print-binary-tree) | [输出二叉树](/solution/0600-0699/0655.Print%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉树` | 中等 | | | [0656](https://leetcode-cn.com/problems/coin-path) | [金币路径](/solution/0600-0699/0656.Coin%20Path/README.md) | `数组`,`动态规划` | 困难 | 🔒 | | [0657](https://leetcode-cn.com/problems/robot-return-to-origin) | [机器人能否返回原点](/solution/0600-0699/0657.Robot%20Return%20to%20Origin/README.md) | `字符串`,`模拟` | 简单 | | | [0658](https://leetcode-cn.com/problems/find-k-closest-elements) | [找到 K 个最接近的元素](/solution/0600-0699/0658.Find%20K%20Closest%20Elements/README.md) | `数组`,`双指针`,`二分查找`,`排序`,`堆（优先队列）` | 中等 | | | [0659](https://leetcode-cn.com/problems/split-array-into-consecutive-subsequences) | [分割数组为连续子序列](/solution/0600-0699/0659.Split%20Array%20into%20Consecutive%20Subsequences/README.md) | `贪心`,`数组`,`哈希表`,`堆（优先队列）` | 中等 | | | [0660](https://leetcode-cn.com/problems/remove-9) | [移除 9](/solution/0600-0699/0660.Remove%209/README.md) | `数学` | 困难 | 🔒 | | [0661](https://leetcode-cn.com/problems/image-smoother) | [图片平滑器](/solution/0600-0699/0661.Image%20Smoother/README.md) | `数组`,`矩阵` | 简单 | | | [0662](https://leetcode-cn.com/problems/maximum-width-of-binary-tree) | [二叉树最大宽度](/solution/0600-0699/0662.Maximum%20Width%20of%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉树` | 中等 | | | [0663](https://leetcode-cn.com/problems/equal-tree-partition) | [均匀树划分](/solution/0600-0699/0663.Equal%20Tree%20Partition/README.md) | `树`,`深度优先搜索`,`二叉树` | 中等 | 🔒 | | [0664](https://leetcode-cn.com/problems/strange-printer) | [奇怪的打印机](/solution/0600-0699/0664.Strange%20Printer/README.md) | `字符串`,`动态规划` | 困难 | | | [0665](https://leetcode-cn.com/problems/non-decreasing-array) | [非递减数列](/solution/0600-0699/0665.Non-decreasing%20Array/README.md) | `数组` | 中等 | | | [0666](https://leetcode-cn.com/problems/path-sum-iv) | [路径总和 IV](/solution/0600-0699/0666.Path%20Sum%20IV/README.md) | `树`,`深度优先搜索`,`数组`,`二叉树` | 中等 | 🔒 | | [0667](https://leetcode-cn.com/problems/beautiful-arrangement-ii) | [优美的排列 II](/solution/0600-0699/0667.Beautiful%20Arrangement%20II/README.md) | `数组`,`数学` | 中等 | | | [0668](https://leetcode-cn.com/problems/kth-smallest-number-in-multiplication-table) | [乘法表中第 k 小的数](/solution/0600-0699/0668.Kth%20Smallest%20Number%20in%20Multiplication%20Table/README.md) | `二分查找` | 困难 | | | [0669](https://leetcode-cn.com/problems/trim-a-binary-search-tree) | [修剪二叉搜索树](/solution/0600-0699/0669.Trim%20a%20Binary%20Search%20Tree/README.md) | `树`,`深度优先搜索`,`二叉搜索树`,`二叉树` | 中等 | | | [0670](https://leetcode-cn.com/problems/maximum-swap) | [最大交换](/solution/0600-0699/0670.Maximum%20Swap/README.md) | `贪心`,`数学` | 中等 | | | [0671](https://leetcode-cn.com/problems/second-minimum-node-in-a-binary-tree) | [二叉树中第二小的节点](/solution/0600-0699/0671.Second%20Minimum%20Node%20In%20a%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`二叉树` | 简单 | | | [0672](https://leetcode-cn.com/problems/bulb-switcher-ii) | [灯泡开关 Ⅱ](/solution/0600-0699/0672.Bulb%20Switcher%20II/README.md) | `位运算`,`深度优先搜索`,`广度优先搜索`,`数学` | 中等 | | | [0673](https://leetcode-cn.com/problems/number-of-longest-increasing-subsequence) | [最长递增子序列的个数](/solution/0600-0699/0673.Number%20of%20Longest%20Increasing%20Subsequence/README.md) | `树状数组`,`线段树`,`数组`,`动态规划` | 中等 | | | [0674](https://leetcode-cn.com/problems/longest-continuous-increasing-subsequence) | [最长连续递增序列](/solution/0600-0699/0674.Longest%20Continuous%20Increasing%20Subsequence/README.md) | `数组` | 简单 | | | [0675](https://leetcode-cn.com/problems/cut-off-trees-for-golf-event) | [为高尔夫比赛砍树](/solution/0600-0699/0675.Cut%20Off%20Trees%20for%20Golf%20Event/README.md) | `广度优先搜索`,`数组`,`矩阵`,`堆（优先队列）` | 困难 | | | [0676](https://leetcode-cn.com/problems/implement-magic-dictionary) | [实现一个魔法字典](/solution/0600-0699/0676.Implement%20Magic%20Dictionary/README.md) | `设计`,`字典树`,`哈希表`,`字符串` | 中等 | | | [0677](https://leetcode-cn.com/problems/map-sum-pairs) | [键值映射](/solution/0600-0699/0677.Map%20Sum%20Pairs/README.md) | `设计`,`字典树`,`哈希表`,`字符串` | 中等 | | | [0678](https://leetcode-cn.com/problems/valid-parenthesis-string) | [有效的括号字符串](/solution/0600-0699/0678.Valid%20Parenthesis%20String/README.md) | `栈`,`贪心`,`字符串`,`动态规划` | 中等 | | | [0679](https://leetcode-cn.com/problems/24-game) | [24 点游戏](/solution/0600-0699/0679.24%20Game/README.md) | `数组`,`数学`,`回溯` | 困难 | | | [0680](https://leetcode-cn.com/problems/valid-palindrome-ii) | [验证回文字符串 Ⅱ](/solution/0600-0699/0680.Valid%20Palindrome%20II/README.md) | `贪心`,`双指针`,`字符串` | 简单 | | | [0681](https://leetcode-cn.com/problems/next-closest-time) | [最近时刻](/solution/0600-0699/0681.Next%20Closest%20Time/README.md) | `字符串`,`枚举` | 中等 | 🔒 | | [0682](https://leetcode-cn.com/problems/baseball-game) | [棒球比赛](/solution/0600-0699/0682.Baseball%20Game/README.md) | `栈`,`数组`,`模拟` | 简单 | | | [0683](https://leetcode-cn.com/problems/k-empty-slots) | [K 个关闭的灯泡](/solution/0600-0699/0683.K%20Empty%20Slots/README.md) | `树状数组`,`数组`,`有序集合`,`滑动窗口` | 困难 | 🔒 | | [0684](https://leetcode-cn.com/problems/redundant-connection) | [冗余连接](/solution/0600-0699/0684.Redundant%20Connection/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`图` | 中等 | | | [0685](https://leetcode-cn.com/problems/redundant-connection-ii) | [冗余连接 II](/solution/0600-0699/0685.Redundant%20Connection%20II/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`图` | 困难 | | | [0686](https://leetcode-cn.com/problems/repeated-string-match) | [重复叠加字符串匹配](/solution/0600-0699/0686.Repeated%20String%20Match/README.md) | `字符串`,`字符串匹配` | 中等 | | | [0687](https://leetcode-cn.com/problems/longest-univalue-path) | [最长同值路径](/solution/0600-0699/0687.Longest%20Univalue%20Path/README.md) | `树`,`深度优先搜索`,`二叉树` | 中等 | | | [0688](https://leetcode-cn.com/problems/knight-probability-in-chessboard) | [骑士在棋盘上的概率](/solution/0600-0699/0688.Knight%20Probability%20in%20Chessboard/README.md) | `动态规划` | 中等 | | | [0689](https://leetcode-cn.com/problems/maximum-sum-of-3-non-overlapping-subarrays) | [三个无重叠子数组的最大和](/solution/0600-0699/0689.Maximum%20Sum%20of%203%20Non-Overlapping%20Subarrays/README.md) | `数组`,`动态规划` | 困难 | | | [0690](https://leetcode-cn.com/problems/employee-importance) | [员工的重要性](/solution/0600-0699/0690.Employee%20Importance/README.md) | `深度优先搜索`,`广度优先搜索`,`哈希表` | 中等 | | | [0691](https://leetcode-cn.com/problems/stickers-to-spell-word) | [贴纸拼词](/solution/0600-0699/0691.Stickers%20to%20Spell%20Word/README.md) | `位运算`,`动态规划`,`回溯`,`状态压缩` | 困难 | | | [0692](https://leetcode-cn.com/problems/top-k-frequent-words) | [前 K 个高频单词](/solution/0600-0699/0692.Top%20K%20Frequent%20Words/README.md) | `字典树`,`哈希表`,`字符串`,`桶排序`,`计数`,`排序`,`堆（优先队列）` | 中等 | | | [0693](https://leetcode-cn.com/problems/binary-number-with-alternating-bits) | [交替位二进制数](/solution/0600-0699/0693.Binary%20Number%20with%20Alternating%20Bits/README.md) | `位运算` | 简单 | | | [0694](https://leetcode-cn.com/problems/number-of-distinct-islands) | [不同岛屿的数量](/solution/0600-0699/0694.Number%20of%20Distinct%20Islands/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`哈希表`,`哈希函数` | 中等 | 🔒 | | [0695](https://leetcode-cn.com/problems/max-area-of-island) | [岛屿的最大面积](/solution/0600-0699/0695.Max%20Area%20of%20Island/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`数组`,`矩阵` | 中等 | | | [0696](https://leetcode-cn.com/problems/count-binary-substrings) | [计数二进制子串](/solution/0600-0699/0696.Count%20Binary%20Substrings/README.md) | `双指针`,`字符串` | 简单 | | | [0697](https://leetcode-cn.com/problems/degree-of-an-array) | [数组的度](/solution/0600-0699/0697.Degree%20of%20an%20Array/README.md) | `数组`,`哈希表` | 简单 | | | [0698](https://leetcode-cn.com/problems/partition-to-k-equal-sum-subsets) | [划分为 k 个相等的子集](/solution/0600-0699/0698.Partition%20to%20K%20Equal%20Sum%20Subsets/README.md) | `位运算`,`记忆化搜索`,`数组`,`动态规划`,`回溯`,`状态压缩` | 中等 | | | [0699](https://leetcode-cn.com/problems/falling-squares) | [掉落的方块](/solution/0600-0699/0699.Falling%20Squares/README.md) | `线段树`,`数组`,`有序集合` | 困难 | | | [0700](https://leetcode-cn.com/problems/search-in-a-binary-search-tree) | [二叉搜索树中的搜索](/solution/0700-0799/0700.Search%20in%20a%20Binary%20Search%20Tree/README.md) | `树`,`二叉搜索树`,`二叉树` | 简单 | | | [0701](https://leetcode-cn.com/problems/insert-into-a-binary-search-tree) | [二叉搜索树中的插入操作](/solution/0700-0799/0701.Insert%20into%20a%20Binary%20Search%20Tree/README.md) | `树`,`二叉搜索树`,`二叉树` | 中等 | | | [0702](https://leetcode-cn.com/problems/search-in-a-sorted-array-of-unknown-size) | [搜索长度未知的有序数组](/solution/0700-0799/0702.Search%20in%20a%20Sorted%20Array%20of%20Unknown%20Size/README.md) | `数组`,`二分查找`,`交互` | 中等 | 🔒 | | [0703](https://leetcode-cn.com/problems/kth-largest-element-in-a-stream) | [数据流中的第 K 大元素](/solution/0700-0799/0703.Kth%20Largest%20Element%20in%20a%20Stream/README.md) | `树`,`设计`,`二叉搜索树`,`二叉树`,`数据流`,`堆（优先队列）` | 简单 | | | [0704](https://leetcode-cn.com/problems/binary-search) | [二分查找](/solution/0700-0799/0704.Binary%20Search/README.md) | `数组`,`二分查找` | 简单 | | | [0705](https://leetcode-cn.com/problems/design-hashset) | [设计哈希集合](/solution/0700-0799/0705.Design%20HashSet/README.md) | `设计`,`数组`,`哈希表`,`链表`,`哈希函数` | 简单 | | | [0706](https://leetcode-cn.com/problems/design-hashmap) | [设计哈希映射](/solution/0700-0799/0706.Design%20HashMap/README.md) | `设计`,`数组`,`哈希表`,`链表`,`哈希函数` | 简单 | | | [0707](https://leetcode-cn.com/problems/design-linked-list) | [设计链表](/solution/0700-0799/0707.Design%20Linked%20List/README.md) | `设计`,`链表` | 中等 | | | [0708](https://leetcode-cn.com/problems/insert-into-a-sorted-circular-linked-list) | [循环有序列表的插入](/solution/0700-0799/0708.Insert%20into%20a%20Sorted%20Circular%20Linked%20List/README.md) | `链表` | 中等 | 🔒 | | [0709](https://leetcode-cn.com/problems/to-lower-case) | [转换成小写字母](/solution/0700-0799/0709.To%20Lower%20Case/README.md) | `字符串` | 简单 | | | [0710](https://leetcode-cn.com/problems/random-pick-with-blacklist) | [黑名单中的随机数](/solution/0700-0799/0710.Random%20Pick%20with%20Blacklist/README.md) | `哈希表`,`数学`,`二分查找`,`排序`,`随机化` | 困难 | | | [0711](https://leetcode-cn.com/problems/number-of-distinct-islands-ii) | [不同岛屿的数量 II](/solution/0700-0799/0711.Number%20of%20Distinct%20Islands%20II/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`哈希表`,`哈希函数` | 困难 | 🔒 | | [0712](https://leetcode-cn.com/problems/minimum-ascii-delete-sum-for-two-strings) | [两个字符串的最小 ASCII 删除和](/solution/0700-0799/0712.Minimum%20ASCII%20Delete%20Sum%20for%20Two%20Strings/README.md) | `字符串`,`动态规划` | 中等 | | | [0713](https://leetcode-cn.com/problems/subarray-product-less-than-k) | [乘积小于 K 的子数组](/solution/0700-0799/0713.Subarray%20Product%20Less%20Than%20K/README.md) | `数组`,`滑动窗口` | 中等 | | | [0714](https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-with-transaction-fee) | [买卖股票的最佳时机含手续费](/solution/0700-0799/0714.Best%20Time%20to%20Buy%20and%20Sell%20Stock%20with%20Transaction%20Fee/README.md) | `贪心`,`数组`,`动态规划` | 中等 | | | [0715](https://leetcode-cn.com/problems/range-module) | [Range 模块](/solution/0700-0799/0715.Range%20Module/README.md) | `设计`,`线段树`,`有序集合` | 困难 | | | [0716](https://leetcode-cn.com/problems/max-stack) | [最大栈](/solution/0700-0799/0716.Max%20Stack/README.md) | `栈`,`设计`,`链表`,`双向链表`,`有序集合` | 简单 | 🔒 | | [0717](https://leetcode-cn.com/problems/1-bit-and-2-bit-characters) | [1 比特与 2 比特字符](/solution/0700-0799/0717.1-bit%20and%202-bit%20Characters/README.md) | `数组` | 简单 | | | [0718](https://leetcode-cn.com/problems/maximum-length-of-repeated-subarray) | [最长重复子数组](/solution/0700-0799/0718.Maximum%20Length%20of%20Repeated%20Subarray/README.md) | `数组`,`二分查找`,`动态规划`,`滑动窗口`,`哈希函数`,`滚动哈希` | 中等 | | | [0719](https://leetcode-cn.com/problems/find-k-th-smallest-pair-distance) | [找出第 k 小的距离对](/solution/0700-0799/0719.Find%20K-th%20Smallest%20Pair%20Distance/README.md) | `数组`,`双指针`,`二分查找`,`排序` | 困难 | | | [0720](https://leetcode-cn.com/problems/longest-word-in-dictionary) | [词典中最长的单词](/solution/0700-0799/0720.Longest%20Word%20in%20Dictionary/README.md) | `字典树`,`数组`,`哈希表`,`字符串`,`排序` | 简单 | | | [0721](https://leetcode-cn.com/problems/accounts-merge) | [账户合并](/solution/0700-0799/0721.Accounts%20Merge/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`数组`,`字符串` | 中等 | | | [0722](https://leetcode-cn.com/problems/remove-comments) | [删除注释](/solution/0700-0799/0722.Remove%20Comments/README.md) | `数组`,`字符串` | 中等 | | | [0723](https://leetcode-cn.com/problems/candy-crush) | [粉碎糖果](/solution/0700-0799/0723.Candy%20Crush/README.md) | `数组`,`双指针`,`矩阵`,`模拟` | 中等 | 🔒 | | [0724](https://leetcode-cn.com/problems/find-pivot-index) | [寻找数组的中心下标](/solution/0700-0799/0724.Find%20Pivot%20Index/README.md) | `数组`,`前缀和` | 简单 | | | [0725](https://leetcode-cn.com/problems/split-linked-list-in-parts) | [分隔链表](/solution/0700-0799/0725.Split%20Linked%20List%20in%20Parts/README.md) | `链表` | 中等 | | | [0726](https://leetcode-cn.com/problems/number-of-atoms) | [原子的数量](/solution/0700-0799/0726.Number%20of%20Atoms/README.md) | `栈`,`哈希表`,`字符串`,`排序` | 困难 | | | [0727](https://leetcode-cn.com/problems/minimum-window-subsequence) | [最小窗口子序列](/solution/0700-0799/0727.Minimum%20Window%20Subsequence/README.md) | `字符串`,`动态规划`,`滑动窗口` | 困难 | 🔒 | | [0728](https://leetcode-cn.com/problems/self-dividing-numbers) | [自除数](/solution/0700-0799/0728.Self%20Dividing%20Numbers/README.md) | `数学` | 简单 | | | [0729](https://leetcode-cn.com/problems/my-calendar-i) | [我的日程安排表 I](/solution/0700-0799/0729.My%20Calendar%20I/README.md) | `设计`,`线段树`,`有序集合` | 中等 | | | [0730](https://leetcode-cn.com/problems/count-different-palindromic-subsequences) | [统计不同回文子序列](/solution/0700-0799/0730.Count%20Different%20Palindromic%20Subsequences/README.md) | `字符串`,`动态规划` | 困难 | | | [0731](https://leetcode-cn.com/problems/my-calendar-ii) | [我的日程安排表 II](/solution/0700-0799/0731.My%20Calendar%20II/README.md) | `设计`,`线段树`,`有序集合` | 中等 | | | [0732](https://leetcode-cn.com/problems/my-calendar-iii) | [我的日程安排表 III](/solution/0700-0799/0732.My%20Calendar%20III/README.md) | `设计`,`线段树`,`有序集合` | 困难 | | | [0733](https://leetcode-cn.com/problems/flood-fill) | [图像渲染](/solution/0700-0799/0733.Flood%20Fill/README.md) | `深度优先搜索`,`广度优先搜索`,`数组`,`矩阵` | 简单 | | | [0734](https://leetcode-cn.com/problems/sentence-similarity) | [句子相似性](/solution/0700-0799/0734.Sentence%20Similarity/README.md) | `数组`,`哈希表`,`字符串` | 简单 | 🔒 | | [0735](https://leetcode-cn.com/problems/asteroid-collision) | [行星碰撞](/solution/0700-0799/0735.Asteroid%20Collision/README.md) | `栈`,`数组` | 中等 | | | [0736](https://leetcode-cn.com/problems/parse-lisp-expression) | [Lisp 语法解析](/solution/0700-0799/0736.Parse%20Lisp%20Expression/README.md) | `栈`,`递归`,`哈希表`,`字符串` | 困难 | | | [0737](https://leetcode-cn.com/problems/sentence-similarity-ii) | [句子相似性 II](/solution/0700-0799/0737.Sentence%20Similarity%20II/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`数组`,`哈希表`,`字符串` | 中等 | 🔒 | | [0738](https://leetcode-cn.com/problems/monotone-increasing-digits) | [单调递增的数字](/solution/0700-0799/0738.Monotone%20Increasing%20Digits/README.md) | `贪心`,`数学` | 中等 | | | [0739](https://leetcode-cn.com/problems/daily-temperatures) | [每日温度](/solution/0700-0799/0739.Daily%20Temperatures/README.md) | `栈`,`数组`,`单调栈` | 中等 | | | [0740](https://leetcode-cn.com/problems/delete-and-earn) | [删除并获得点数](/solution/0700-0799/0740.Delete%20and%20Earn/README.md) | `数组`,`哈希表`,`动态规划` | 中等 | | | [0741](https://leetcode-cn.com/problems/cherry-pickup) | [摘樱桃](/solution/0700-0799/0741.Cherry%20Pickup/README.md) | `数组`,`动态规划`,`矩阵` | 困难 | | | [0742](https://leetcode-cn.com/problems/closest-leaf-in-a-binary-tree) | [二叉树最近的叶节点](/solution/0700-0799/0742.Closest%20Leaf%20in%20a%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉树` | 中等 | 🔒 | | [0743](https://leetcode-cn.com/problems/network-delay-time) | [网络延迟时间](/solution/0700-0799/0743.Network%20Delay%20Time/README.md) | `深度优先搜索`,`广度优先搜索`,`图`,`最短路`,`堆（优先队列）` | 中等 | | | [0744](https://leetcode-cn.com/problems/find-smallest-letter-greater-than-target) | [寻找比目标字母大的最小字母](/solution/0700-0799/0744.Find%20Smallest%20Letter%20Greater%20Than%20Target/README.md) | `数组`,`二分查找` | 简单 | | | [0745](https://leetcode-cn.com/problems/prefix-and-suffix-search) | [前缀和后缀搜索](/solution/0700-0799/0745.Prefix%20and%20Suffix%20Search/README.md) | `设计`,`字典树`,`字符串` | 困难 | | | [0746](https://leetcode-cn.com/problems/min-cost-climbing-stairs) | [使用最小花费爬楼梯](/solution/0700-0799/0746.Min%20Cost%20Climbing%20Stairs/README.md) | `数组`,`动态规划` | 简单 | | | [0747](https://leetcode-cn.com/problems/largest-number-at-least-twice-of-others) | [至少是其他数字两倍的最大数](/solution/0700-0799/0747.Largest%20Number%20At%20Least%20Twice%20of%20Others/README.md) | `数组`,`排序` | 简单 | | | [0748](https://leetcode-cn.com/problems/shortest-completing-word) | [最短补全词](/solution/0700-0799/0748.Shortest%20Completing%20Word/README.md) | `数组`,`哈希表`,`字符串` | 简单 | | | [0749](https://leetcode-cn.com/problems/contain-virus) | [隔离病毒](/solution/0700-0799/0749.Contain%20Virus/README.md) | `深度优先搜索`,`广度优先搜索`,`数组`,`矩阵`,`模拟` | 困难 | | | [0750](https://leetcode-cn.com/problems/number-of-corner-rectangles) | [角矩形的数量](/solution/0700-0799/0750.Number%20Of%20Corner%20Rectangles/README.md) | `数组`,`数学`,`动态规划`,`矩阵` | 中等 | 🔒 | | [0751](https://leetcode-cn.com/problems/ip-to-cidr) | [IP 到 CIDR](/solution/0700-0799/0751.IP%20to%20CIDR/README.md) | `位运算`,`字符串` | 中等 | 🔒 | | [0752](https://leetcode-cn.com/problems/open-the-lock) | [打开转盘锁](/solution/0700-0799/0752.Open%20the%20Lock/README.md) | `广度优先搜索`,`数组`,`哈希表`,`字符串` | 中等 | | | [0753](https://leetcode-cn.com/problems/cracking-the-safe) | [破解保险箱](/solution/0700-0799/0753.Cracking%20the%20Safe/README.md) | `深度优先搜索`,`图`,`欧拉回路` | 困难 | | | [0754](https://leetcode-cn.com/problems/reach-a-number) | [到达终点数字](/solution/0700-0799/0754.Reach%20a%20Number/README.md) | `数学`,`二分查找` | 中等 | | | [0755](https://leetcode-cn.com/problems/pour-water) | [倒水](/solution/0700-0799/0755.Pour%20Water/README.md) | `数组`,`模拟` | 中等 | 🔒 | | [0756](https://leetcode-cn.com/problems/pyramid-transition-matrix) | [金字塔转换矩阵](/solution/0700-0799/0756.Pyramid%20Transition%20Matrix/README.md) | `位运算`,`深度优先搜索`,`广度优先搜索` | 中等 | | | [0757](https://leetcode-cn.com/problems/set-intersection-size-at-least-two) | [设置交集大小至少为 2](/solution/0700-0799/0757.Set%20Intersection%20Size%20At%20Least%20Two/README.md) | `贪心`,`数组`,`排序` | 困难 | | | [0758](https://leetcode-cn.com/problems/bold-words-in-string) | [字符串中的加粗单词](/solution/0700-0799/0758.Bold%20Words%20in%20String/README.md) | `字典树`,`数组`,`哈希表`,`字符串`,`字符串匹配` | 中等 | 🔒 | | [0759](https://leetcode-cn.com/problems/employee-free-time) | [员工空闲时间](/solution/0700-0799/0759.Employee%20Free%20Time/README.md) | `数组`,`排序`,`堆（优先队列）` | 困难 | 🔒 | | [0760](https://leetcode-cn.com/problems/find-anagram-mappings) | [找出变位映射](/solution/0700-0799/0760.Find%20Anagram%20Mappings/README.md) | `数组`,`哈希表` | 简单 | 🔒 | | [0761](https://leetcode-cn.com/problems/special-binary-string) | [特殊的二进制序列](/solution/0700-0799/0761.Special%20Binary%20String/README.md) | `递归`,`字符串` | 困难 | | | [0762](https://leetcode-cn.com/problems/prime-number-of-set-bits-in-binary-representation) | [二进制表示中质数个计算置位](/solution/0700-0799/0762.Prime%20Number%20of%20Set%20Bits%20in%20Binary%20Representation/README.md) | `位运算`,`数学` | 简单 | | | [0763](https://leetcode-cn.com/problems/partition-labels) | [划分字母区间](/solution/0700-0799/0763.Partition%20Labels/README.md) | `贪心`,`哈希表`,`双指针`,`字符串` | 中等 | | | [0764](https://leetcode-cn.com/problems/largest-plus-sign) | [最大加号标志](/solution/0700-0799/0764.Largest%20Plus%20Sign/README.md) | `数组`,`动态规划` | 中等 | | | [0765](https://leetcode-cn.com/problems/couples-holding-hands) | [情侣牵手](/solution/0700-0799/0765.Couples%20Holding%20Hands/README.md) | `贪心`,`深度优先搜索`,`广度优先搜索`,`并查集`,`图` | 困难 | | | [0766](https://leetcode-cn.com/problems/toeplitz-matrix) | [托普利茨矩阵](/solution/0700-0799/0766.Toeplitz%20Matrix/README.md) | `数组`,`矩阵` | 简单 | | | [0767](https://leetcode-cn.com/problems/reorganize-string) | [重构字符串](/solution/0700-0799/0767.Reorganize%20String/README.md) | `贪心`,`哈希表`,`字符串`,`计数`,`排序`,`堆（优先队列）` | 中等 | | | [0768](https://leetcode-cn.com/problems/max-chunks-to-make-sorted-ii) | [最多能完成排序的块 II](/solution/0700-0799/0768.Max%20Chunks%20To%20Make%20Sorted%20II/README.md) | `栈`,`贪心`,`数组`,`排序`,`单调栈` | 困难 | | | [0769](https://leetcode-cn.com/problems/max-chunks-to-make-sorted) | [最多能完成排序的块](/solution/0700-0799/0769.Max%20Chunks%20To%20Make%20Sorted/README.md) | `栈`,`贪心`,`数组`,`排序`,`单调栈` | 中等 | | | [0770](https://leetcode-cn.com/problems/basic-calculator-iv) | [基本计算器 IV](/solution/0700-0799/0770.Basic%20Calculator%20IV/README.md) | `栈`,`递归`,`哈希表`,`数学`,`字符串` | 困难 | | | [0771](https://leetcode-cn.com/problems/jewels-and-stones) | [宝石与石头](/solution/0700-0799/0771.Jewels%20and%20Stones/README.md) | `哈希表`,`字符串` | 简单 | | | [0772](https://leetcode-cn.com/problems/basic-calculator-iii) | [基本计算器 III](/solution/0700-0799/0772.Basic%20Calculator%20III/README.md) | `栈`,`递归`,`数学`,`字符串` | 困难 | 🔒 | | [0773](https://leetcode-cn.com/problems/sliding-puzzle) | [滑动谜题](/solution/0700-0799/0773.Sliding%20Puzzle/README.md) | `广度优先搜索`,`数组`,`矩阵` | 困难 | | | [0774](https://leetcode-cn.com/problems/minimize-max-distance-to-gas-station) | [最小化去加油站的最大距离](/solution/0700-0799/0774.Minimize%20Max%20Distance%20to%20Gas%20Station/README.md) | `数组`,`二分查找` | 困难 | 🔒 | | [0775](https://leetcode-cn.com/problems/global-and-local-inversions) | [全局倒置与局部倒置](/solution/0700-0799/0775.Global%20and%20Local%20Inversions/README.md) | `数组`,`数学` | 中等 | | | [0776](https://leetcode-cn.com/problems/split-bst) | [拆分二叉搜索树](/solution/0700-0799/0776.Split%20BST/README.md) | `树`,`二叉搜索树`,`递归`,`二叉树` | 中等 | 🔒 | | [0777](https://leetcode-cn.com/problems/swap-adjacent-in-lr-string) | [在 LR 字符串中交换相邻字符](/solution/0700-0799/0777.Swap%20Adjacent%20in%20LR%20String/README.md) | `双指针`,`字符串` | 中等 | | | [0778](https://leetcode-cn.com/problems/swim-in-rising-water) | [水位上升的泳池中游泳](/solution/0700-0799/0778.Swim%20in%20Rising%20Water/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`数组`,`二分查找`,`矩阵`,`堆（优先队列）` | 困难 | | | [0779](https://leetcode-cn.com/problems/k-th-symbol-in-grammar) | [第 K 个语法符号](/solution/0700-0799/0779.K-th%20Symbol%20in%20Grammar/README.md) | `位运算`,`递归`,`数学` | 中等 | | | [0780](https://leetcode-cn.com/problems/reaching-points) | [到达终点](/solution/0700-0799/0780.Reaching%20Points/README.md) | `数学` | 困难 | | | [0781](https://leetcode-cn.com/problems/rabbits-in-forest) | [森林中的兔子](/solution/0700-0799/0781.Rabbits%20in%20Forest/README.md) | `贪心`,`数组`,`哈希表`,`数学` | 中等 | | | [0782](https://leetcode-cn.com/problems/transform-to-chessboard) | [变为棋盘](/solution/0700-0799/0782.Transform%20to%20Chessboard/README.md) | `位运算`,`数组`,`数学`,`矩阵` | 困难 | | | [0783](https://leetcode-cn.com/problems/minimum-distance-between-bst-nodes) | [二叉搜索树节点最小距离](/solution/0700-0799/0783.Minimum%20Distance%20Between%20BST%20Nodes/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉搜索树`,`二叉树` | 简单 | | | [0784](https://leetcode-cn.com/problems/letter-case-permutation) | [字母大小写全排列](/solution/0700-0799/0784.Letter%20Case%20Permutation/README.md) | `位运算`,`字符串`,`回溯` | 中等 | | | [0785](https://leetcode-cn.com/problems/is-graph-bipartite) | [判断二分图](/solution/0700-0799/0785.Is%20Graph%20Bipartite/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`图` | 中等 | | | [0786](https://leetcode-cn.com/problems/k-th-smallest-prime-fraction) | [第 K 个最小的素数分数](/solution/0700-0799/0786.K-th%20Smallest%20Prime%20Fraction/README.md) | `数组`,`二分查找`,`堆（优先队列）` | 困难 | | | [0787](https://leetcode-cn.com/problems/cheapest-flights-within-k-stops) | [K 站中转内最便宜的航班](/solution/0700-0799/0787.Cheapest%20Flights%20Within%20K%20Stops/README.md) | `深度优先搜索`,`广度优先搜索`,`图`,`动态规划`,`最短路`,`堆（优先队列）` | 中等 | | | [0788](https://leetcode-cn.com/problems/rotated-digits) | [旋转数字](/solution/0700-0799/0788.Rotated%20Digits/README.md) | `数学`,`动态规划` | 中等 | | | [0789](https://leetcode-cn.com/problems/escape-the-ghosts) | [逃脱阻碍者](/solution/0700-0799/0789.Escape%20The%20Ghosts/README.md) | `数组`,`数学` | 中等 | | | [0790](https://leetcode-cn.com/problems/domino-and-tromino-tiling) | [多米诺和托米诺平铺](/solution/0700-0799/0790.Domino%20and%20Tromino%20Tiling/README.md) | `动态规划` | 中等 | | | [0791](https://leetcode-cn.com/problems/custom-sort-string) | [自定义字符串排序](/solution/0700-0799/0791.Custom%20Sort%20String/README.md) | `哈希表`,`字符串`,`排序` | 中等 | | | [0792](https://leetcode-cn.com/problems/number-of-matching-subsequences) | [匹配子序列的单词数](/solution/0700-0799/0792.Number%20of%20Matching%20Subsequences/README.md) | `字典树`,`哈希表`,`字符串`,`排序` | 中等 | | | [0793](https://leetcode-cn.com/problems/preimage-size-of-factorial-zeroes-function) | [阶乘函数后 K 个零](/solution/0700-0799/0793.Preimage%20Size%20of%20Factorial%20Zeroes%20Function/README.md) | `数学`,`二分查找` | 困难 | | | [0794](https://leetcode-cn.com/problems/valid-tic-tac-toe-state) | [有效的井字游戏](/solution/0700-0799/0794.Valid%20Tic-Tac-Toe%20State/README.md) | `数组`,`字符串` | 中等 | | | [0795](https://leetcode-cn.com/problems/number-of-subarrays-with-bounded-maximum) | [区间子数组个数](/solution/0700-0799/0795.Number%20of%20Subarrays%20with%20Bounded%20Maximum/README.md) | `数组`,`双指针` | 中等 | | | [0796](https://leetcode-cn.com/problems/rotate-string) | [旋转字符串](/solution/0700-0799/0796.Rotate%20String/README.md) | `字符串`,`字符串匹配` | 简单 | | | [0797](https://leetcode-cn.com/problems/all-paths-from-source-to-target) | [所有可能的路径](/solution/0700-0799/0797.All%20Paths%20From%20Source%20to%20Target/README.md) | `深度优先搜索`,`广度优先搜索`,`图`,`回溯` | 中等 | | | [0798](https://leetcode-cn.com/problems/smallest-rotation-with-highest-score) | [得分最高的最小轮调](/solution/0700-0799/0798.Smallest%20Rotation%20with%20Highest%20Score/README.md) | `数组`,`前缀和` | 困难 | | | [0799](https://leetcode-cn.com/problems/champagne-tower) | [香槟塔](/solution/0700-0799/0799.Champagne%20Tower/README.md) | `动态规划` | 中等 | | | [0800](https://leetcode-cn.com/problems/similar-rgb-color) | [相似 RGB 颜色](/solution/0800-0899/0800.Similar%20RGB%20Color/README.md) | `数学`,`字符串`,`枚举` | 简单 | 🔒 | | [0801](https://leetcode-cn.com/problems/minimum-swaps-to-make-sequences-increasing) | [使序列递增的最小交换次数](/solution/0800-0899/0801.Minimum%20Swaps%20To%20Make%20Sequences%20Increasing/README.md) | `数组`,`动态规划` | 困难 | | | [0802](https://leetcode-cn.com/problems/find-eventual-safe-states) | [找到最终的安全状态](/solution/0800-0899/0802.Find%20Eventual%20Safe%20States/README.md) | `深度优先搜索`,`广度优先搜索`,`图`,`拓扑排序` | 中等 | | | [0803](https://leetcode-cn.com/problems/bricks-falling-when-hit) | [打砖块](/solution/0800-0899/0803.Bricks%20Falling%20When%20Hit/README.md) | `并查集`,`数组`,`矩阵` | 困难 | | | [0804](https://leetcode-cn.com/problems/unique-morse-code-words) | [唯一摩尔斯密码词](/solution/0800-0899/0804.Unique%20Morse%20Code%20Words/README.md) | `数组`,`哈希表`,`字符串` | 简单 | | | [0805](https://leetcode-cn.com/problems/split-array-with-same-average) | [数组的均值分割](/solution/0800-0899/0805.Split%20Array%20With%20Same%20Average/README.md) | `位运算`,`数组`,`数学`,`动态规划`,`状态压缩` | 困难 | | | [0806](https://leetcode-cn.com/problems/number-of-lines-to-write-string) | [写字符串需要的行数](/solution/0800-0899/0806.Number%20of%20Lines%20To%20Write%20String/README.md) | `数组`,`字符串` | 简单 | | | [0807](https://leetcode-cn.com/problems/max-increase-to-keep-city-skyline) | [保持城市天际线](/solution/0800-0899/0807.Max%20Increase%20to%20Keep%20City%20Skyline/README.md) | `贪心`,`数组`,`矩阵` | 中等 | | | [0808](https://leetcode-cn.com/problems/soup-servings) | [分汤](/solution/0800-0899/0808.Soup%20Servings/README.md) | `数学`,`动态规划`,`概率与统计` | 中等 | | | [0809](https://leetcode-cn.com/problems/expressive-words) | [情感丰富的文字](/solution/0800-0899/0809.Expressive%20Words/README.md) | `数组`,`双指针`,`字符串` | 中等 | | | [0810](https://leetcode-cn.com/problems/chalkboard-xor-game) | [黑板异或游戏](/solution/0800-0899/0810.Chalkboard%20XOR%20Game/README.md) | `位运算`,`脑筋急转弯`,`数组`,`数学`,`博弈` | 困难 | | | [0811](https://leetcode-cn.com/problems/subdomain-visit-count) | [子域名访问计数](/solution/0800-0899/0811.Subdomain%20Visit%20Count/README.md) | `数组`,`哈希表`,`字符串`,`计数` | 中等 | | | [0812](https://leetcode-cn.com/problems/largest-triangle-area) | [最大三角形面积](/solution/0800-0899/0812.Largest%20Triangle%20Area/README.md) | `几何`,`数组`,`数学` | 简单 | | | [0813](https://leetcode-cn.com/problems/largest-sum-of-averages) | [最大平均值和的分组](/solution/0800-0899/0813.Largest%20Sum%20of%20Averages/README.md) | `数组`,`动态规划` | 中等 | | | [0814](https://leetcode-cn.com/problems/binary-tree-pruning) | [二叉树剪枝](/solution/0800-0899/0814.Binary%20Tree%20Pruning/README.md) | `树`,`深度优先搜索`,`二叉树` | 中等 | | | [0815](https://leetcode-cn.com/problems/bus-routes) | [公交路线](/solution/0800-0899/0815.Bus%20Routes/README.md) | `广度优先搜索`,`数组`,`哈希表` | 困难 | | | [0816](https://leetcode-cn.com/problems/ambiguous-coordinates) | [模糊坐标](/solution/0800-0899/0816.Ambiguous%20Coordinates/README.md) | `字符串`,`回溯` | 中等 | | | [0818](https://leetcode-cn.com/problems/race-car) | [赛车](/solution/0800-0899/0818.Race%20Car/README.md) | `动态规划` | 困难 | | | [0819](https://leetcode-cn.com/problems/most-common-word) | [最常见的单词](/solution/0800-0899/0819.Most%20Common%20Word/README.md) | `哈希表`,`字符串`,`计数` | 简单 | | | [0820](https://leetcode-cn.com/problems/short-encoding-of-words) | [单词的压缩编码](/solution/0800-0899/0820.Short%20Encoding%20of%20Words/README.md) | `字典树`,`数组`,`哈希表`,`字符串` | 中等 | | | [0821](https://leetcode-cn.com/problems/shortest-distance-to-a-character) | [字符的最短距离](/solution/0800-0899/0821.Shortest%20Distance%20to%20a%20Character/README.md) | `数组`,`双指针`,`字符串` | 简单 | | | [0822](https://leetcode-cn.com/problems/card-flipping-game) | [翻转卡片游戏](/solution/0800-0899/0822.Card%20Flipping%20Game/README.md) | `数组`,`哈希表` | 中等 | | | [0823](https://leetcode-cn.com/problems/binary-trees-with-factors) | [带因子的二叉树](/solution/0800-0899/0823.Binary%20Trees%20With%20Factors/README.md) | `数组`,`哈希表`,`动态规划` | 中等 | | | [0824](https://leetcode-cn.com/problems/goat-latin) | [山羊拉丁文](/solution/0800-0899/0824.Goat%20Latin/README.md) | `字符串` | 简单 | | | [0825](https://leetcode-cn.com/problems/friends-of-appropriate-ages) | [适龄的朋友](/solution/0800-0899/0825.Friends%20Of%20Appropriate%20Ages/README.md) | `数组`,`双指针`,`二分查找`,`排序` | 中等 | | | [0826](https://leetcode-cn.com/problems/most-profit-assigning-work) | [安排工作以达到最大收益](/solution/0800-0899/0826.Most%20Profit%20Assigning%20Work/README.md) | `贪心`,`数组`,`双指针`,`二分查找`,`排序` | 中等 | | | [0827](https://leetcode-cn.com/problems/making-a-large-island) | [最大人工岛](/solution/0800-0899/0827.Making%20A%20Large%20Island/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`数组`,`矩阵` | 困难 | | | [0828](https://leetcode-cn.com/problems/count-unique-characters-of-all-substrings-of-a-given-string) | [统计子串中的唯一字符](/solution/0800-0899/0828.Count%20Unique%20Characters%20of%20All%20Substrings%20of%20a%20Given%20String/README.md) | `字符串`,`动态规划` | 困难 | | | [0829](https://leetcode-cn.com/problems/consecutive-numbers-sum) | [连续整数求和](/solution/0800-0899/0829.Consecutive%20Numbers%20Sum/README.md) | `数学`,`枚举` | 困难 | | | [0830](https://leetcode-cn.com/problems/positions-of-large-groups) | [较大分组的位置](/solution/0800-0899/0830.Positions%20of%20Large%20Groups/README.md) | `字符串` | 简单 | | | [0831](https://leetcode-cn.com/problems/masking-personal-information) | [隐藏个人信息](/solution/0800-0899/0831.Masking%20Personal%20Information/README.md) | `字符串` | 中等 | | | [0832](https://leetcode-cn.com/problems/flipping-an-image) | [翻转图像](/solution/0800-0899/0832.Flipping%20an%20Image/README.md) | `数组`,`双指针`,`矩阵`,`模拟` | 简单 | | | [0833](https://leetcode-cn.com/problems/find-and-replace-in-string) | [字符串中的查找与替换](/solution/0800-0899/0833.Find%20And%20Replace%20in%20String/README.md) | `数组`,`字符串`,`排序` | 中等 | | | [0834](https://leetcode-cn.com/problems/sum-of-distances-in-tree) | [树中距离之和](/solution/0800-0899/0834.Sum%20of%20Distances%20in%20Tree/README.md) | `树`,`深度优先搜索`,`图`,`动态规划` | 困难 | | | [0835](https://leetcode-cn.com/problems/image-overlap) | [图像重叠](/solution/0800-0899/0835.Image%20Overlap/README.md) | `数组`,`矩阵` | 中等 | | | [0836](https://leetcode-cn.com/problems/rectangle-overlap) | [矩形重叠](/solution/0800-0899/0836.Rectangle%20Overlap/README.md) | `几何`,`数学` | 简单 | | | [0837](https://leetcode-cn.com/problems/new-21-game) | [新 21 点](/solution/0800-0899/0837.New%2021%20Game/README.md) | `数学`,`动态规划`,`滑动窗口`,`概率与统计` | 中等 | | | [0838](https://leetcode-cn.com/problems/push-dominoes) | [推多米诺](/solution/0800-0899/0838.Push%20Dominoes/README.md) | `双指针`,`字符串`,`动态规划` | 中等 | | | [0839](https://leetcode-cn.com/problems/similar-string-groups) | [相似字符串组](/solution/0800-0899/0839.Similar%20String%20Groups/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`字符串` | 困难 | | | [0840](https://leetcode-cn.com/problems/magic-squares-in-grid) | [矩阵中的幻方](/solution/0800-0899/0840.Magic%20Squares%20In%20Grid/README.md) | `数组`,`数学`,`矩阵` | 中等 | | | [0841](https://leetcode-cn.com/problems/keys-and-rooms) | [钥匙和房间](/solution/0800-0899/0841.Keys%20and%20Rooms/README.md) | `深度优先搜索`,`广度优先搜索`,`图` | 中等 | | | [0842](https://leetcode-cn.com/problems/split-array-into-fibonacci-sequence) | [将数组拆分成斐波那契序列](/solution/0800-0899/0842.Split%20Array%20into%20Fibonacci%20Sequence/README.md) | `字符串`,`回溯` | 中等 | | | [0843](https://leetcode-cn.com/problems/guess-the-word) | [猜猜这个单词](/solution/0800-0899/0843.Guess%20the%20Word/README.md) | `数组`,`数学`,`字符串`,`博弈`,`交互` | 困难 | | | [0844](https://leetcode-cn.com/problems/backspace-string-compare) | [比较含退格的字符串](/solution/0800-0899/0844.Backspace%20String%20Compare/README.md) | `栈`,`双指针`,`字符串`,`模拟` | 简单 | | | [0845](https://leetcode-cn.com/problems/longest-mountain-in-array) | [数组中的最长山脉](/solution/0800-0899/0845.Longest%20Mountain%20in%20Array/README.md) | `数组`,`双指针`,`动态规划`,`枚举` | 中等 | | | [0846](https://leetcode-cn.com/problems/hand-of-straights) | [一手顺子](/solution/0800-0899/0846.Hand%20of%20Straights/README.md) | `贪心`,`数组`,`哈希表`,`排序` | 中等 | | | [0847](https://leetcode-cn.com/problems/shortest-path-visiting-all-nodes) | [访问所有节点的最短路径](/solution/0800-0899/0847.Shortest%20Path%20Visiting%20All%20Nodes/README.md) | `位运算`,`广度优先搜索`,`图`,`动态规划`,`状态压缩` | 困难 | | | [0848](https://leetcode-cn.com/problems/shifting-letters) | [字母移位](/solution/0800-0899/0848.Shifting%20Letters/README.md) | `数组`,`字符串` | 中等 | | | [0849](https://leetcode-cn.com/problems/maximize-distance-to-closest-person) | [到最近的人的最大距离](/solution/0800-0899/0849.Maximize%20Distance%20to%20Closest%20Person/README.md) | `数组` | 中等 | | | [0850](https://leetcode-cn.com/problems/rectangle-area-ii) | [矩形面积 II](/solution/0800-0899/0850.Rectangle%20Area%20II/README.md) | `线段树`,`数组`,`有序集合`,`扫描线` | 困难 | | | [0851](https://leetcode-cn.com/problems/loud-and-rich) | [喧闹和富有](/solution/0800-0899/0851.Loud%20and%20Rich/README.md) | `深度优先搜索`,`图`,`拓扑排序`,`数组` | 中等 | | | [0852](https://leetcode-cn.com/problems/peak-index-in-a-mountain-array) | [山脉数组的峰顶索引](/solution/0800-0899/0852.Peak%20Index%20in%20a%20Mountain%20Array/README.md) | `数组`,`二分查找` | 简单 | | | [0853](https://leetcode-cn.com/problems/car-fleet) | [车队](/solution/0800-0899/0853.Car%20Fleet/README.md) | `栈`,`数组`,`排序`,`单调栈` | 中等 | | | [0854](https://leetcode-cn.com/problems/k-similar-strings) | [相似度为 K 的字符串](/solution/0800-0899/0854.K-Similar%20Strings/README.md) | `广度优先搜索`,`字符串` | 困难 | | | [0855](https://leetcode-cn.com/problems/exam-room) | [考场就座](/solution/0800-0899/0855.Exam%20Room/README.md) | `设计`,`有序集合` | 中等 | | | [0856](https://leetcode-cn.com/problems/score-of-parentheses) | [括号的分数](/solution/0800-0899/0856.Score%20of%20Parentheses/README.md) | `栈`,`字符串` | 中等 | | | [0857](https://leetcode-cn.com/problems/minimum-cost-to-hire-k-workers) | [雇佣 K 名工人的最低成本](/solution/0800-0899/0857.Minimum%20Cost%20to%20Hire%20K%20Workers/README.md) | `贪心`,`数组`,`排序`,`堆（优先队列）` | 困难 | | | [0858](https://leetcode-cn.com/problems/mirror-reflection) | [镜面反射](/solution/0800-0899/0858.Mirror%20Reflection/README.md) | `几何`,`数学` | 中等 | | | [0859](https://leetcode-cn.com/problems/buddy-strings) | [亲密字符串](/solution/0800-0899/0859.Buddy%20Strings/README.md) | `哈希表`,`字符串` | 简单 | | | [0860](https://leetcode-cn.com/problems/lemonade-change) | [柠檬水找零](/solution/0800-0899/0860.Lemonade%20Change/README.md) | `贪心`,`数组` | 简单 | | | [0861](https://leetcode-cn.com/problems/score-after-flipping-matrix) | [翻转矩阵后的得分](/solution/0800-0899/0861.Score%20After%20Flipping%20Matrix/README.md) | `贪心`,`位运算`,`数组`,`矩阵` | 中等 | | | [0862](https://leetcode-cn.com/problems/shortest-subarray-with-sum-at-least-k) | [和至少为 K 的最短子数组](/solution/0800-0899/0862.Shortest%20Subarray%20with%20Sum%20at%20Least%20K/README.md) | `队列`,`数组`,`二分查找`,`前缀和`,`滑动窗口`,`单调队列`,`堆（优先队列）` | 困难 | | | [0863](https://leetcode-cn.com/problems/all-nodes-distance-k-in-binary-tree) | [二叉树中所有距离为 K 的结点](/solution/0800-0899/0863.All%20Nodes%20Distance%20K%20in%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉树` | 中等 | | | [0864](https://leetcode-cn.com/problems/shortest-path-to-get-all-keys) | [获取所有钥匙的最短路径](/solution/0800-0899/0864.Shortest%20Path%20to%20Get%20All%20Keys/README.md) | `位运算`,`广度优先搜索` | 困难 | | | [0865](https://leetcode-cn.com/problems/smallest-subtree-with-all-the-deepest-nodes) | [具有所有最深节点的最小子树](/solution/0800-0899/0865.Smallest%20Subtree%20with%20all%20the%20Deepest%20Nodes/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`哈希表`,`二叉树` | 中等 | | | [0866](https://leetcode-cn.com/problems/prime-palindrome) | [回文素数](/solution/0800-0899/0866.Prime%20Palindrome/README.md) | `数学` | 中等 | | | [0867](https://leetcode-cn.com/problems/transpose-matrix) | [转置矩阵](/solution/0800-0899/0867.Transpose%20Matrix/README.md) | `数组`,`矩阵`,`模拟` | 简单 | | | [0868](https://leetcode-cn.com/problems/binary-gap) | [二进制间距](/solution/0800-0899/0868.Binary%20Gap/README.md) | `位运算`,`数学` | 简单 | | | [0869](https://leetcode-cn.com/problems/reordered-power-of-2) | [重新排序得到 2 的幂](/solution/0800-0899/0869.Reordered%20Power%20of%202/README.md) | `数学`,`计数`,`枚举`,`排序` | 中等 | | | [0870](https://leetcode-cn.com/problems/advantage-shuffle) | [优势洗牌](/solution/0800-0899/0870.Advantage%20Shuffle/README.md) | `贪心`,`数组`,`排序` | 中等 | | | [0871](https://leetcode-cn.com/problems/minimum-number-of-refueling-stops) | [最低加油次数](/solution/0800-0899/0871.Minimum%20Number%20of%20Refueling%20Stops/README.md) | `贪心`,`数组`,`动态规划`,`堆（优先队列）` | 困难 | | | [0872](https://leetcode-cn.com/problems/leaf-similar-trees) | [叶子相似的树](/solution/0800-0899/0872.Leaf-Similar%20Trees/README.md) | `树`,`深度优先搜索`,`二叉树` | 简单 | | | [0873](https://leetcode-cn.com/problems/length-of-longest-fibonacci-subsequence) | [最长的斐波那契子序列的长度](/solution/0800-0899/0873.Length%20of%20Longest%20Fibonacci%20Subsequence/README.md) | `数组`,`哈希表`,`动态规划` | 中等 | | | [0874](https://leetcode-cn.com/problems/walking-robot-simulation) | [模拟行走机器人](/solution/0800-0899/0874.Walking%20Robot%20Simulation/README.md) | `数组`,`模拟` | 中等 | | | [0875](https://leetcode-cn.com/problems/koko-eating-bananas) | [爱吃香蕉的珂珂](/solution/0800-0899/0875.Koko%20Eating%20Bananas/README.md) | `数组`,`二分查找` | 中等 | | | [0876](https://leetcode-cn.com/problems/middle-of-the-linked-list) | [链表的中间结点](/solution/0800-0899/0876.Middle%20of%20the%20Linked%20List/README.md) | `链表`,`双指针` | 简单 | | | [0877](https://leetcode-cn.com/problems/stone-game) | [石子游戏](/solution/0800-0899/0877.Stone%20Game/README.md) | `数组`,`数学`,`动态规划`,`博弈` | 中等 | | | [0878](https://leetcode-cn.com/problems/nth-magical-number) | [第 N 个神奇数字](/solution/0800-0899/0878.Nth%20Magical%20Number/README.md) | `数学`,`二分查找` | 困难 | | | [0879](https://leetcode-cn.com/problems/profitable-schemes) | [盈利计划](/solution/0800-0899/0879.Profitable%20Schemes/README.md) | `数组`,`动态规划` | 困难 | | | [0880](https://leetcode-cn.com/problems/decoded-string-at-index) | [索引处的解码字符串](/solution/0800-0899/0880.Decoded%20String%20at%20Index/README.md) | `栈`,`字符串` | 中等 | | | [0881](https://leetcode-cn.com/problems/boats-to-save-people) | [救生艇](/solution/0800-0899/0881.Boats%20to%20Save%20People/README.md) | `贪心`,`数组`,`双指针`,`排序` | 中等 | | | [0882](https://leetcode-cn.com/problems/reachable-nodes-in-subdivided-graph) | [细分图中的可到达结点](/solution/0800-0899/0882.Reachable%20Nodes%20In%20Subdivided%20Graph/README.md) | `图`,`最短路`,`堆（优先队列）` | 困难 | | | [0883](https://leetcode-cn.com/problems/projection-area-of-3d-shapes) | [三维形体投影面积](/solution/0800-0899/0883.Projection%20Area%20of%203D%20Shapes/README.md) | `几何`,`数组`,`数学`,`矩阵` | 简单 | | | [0884](https://leetcode-cn.com/problems/uncommon-words-from-two-sentences) | [两句话中的不常见单词](/solution/0800-0899/0884.Uncommon%20Words%20from%20Two%20Sentences/README.md) | `哈希表`,`字符串` | 简单 | | | [0885](https://leetcode-cn.com/problems/spiral-matrix-iii) | [螺旋矩阵 III](/solution/0800-0899/0885.Spiral%20Matrix%20III/README.md) | `数组`,`矩阵`,`模拟` | 中等 | | | [0886](https://leetcode-cn.com/problems/possible-bipartition) | [可能的二分法](/solution/0800-0899/0886.Possible%20Bipartition/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`图` | 中等 | | | [0887](https://leetcode-cn.com/problems/super-egg-drop) | [鸡蛋掉落](/solution/0800-0899/0887.Super%20Egg%20Drop/README.md) | `数学`,`二分查找`,`动态规划` | 困难 | | | [0888](https://leetcode-cn.com/problems/fair-candy-swap) | [公平的糖果交换](/solution/0800-0899/0888.Fair%20Candy%20Swap/README.md) | `数组`,`哈希表`,`二分查找`,`排序` | 简单 | | | [0889](https://leetcode-cn.com/problems/construct-binary-tree-from-preorder-and-postorder-traversal) | [根据前序和后序遍历构造二叉树](/solution/0800-0899/0889.Construct%20Binary%20Tree%20from%20Preorder%20and%20Postorder%20Traversal/README.md) | `树`,`数组`,`哈希表`,`分治`,`二叉树` | 中等 | | | [0890](https://leetcode-cn.com/problems/find-and-replace-pattern) | [查找和替换模式](/solution/0800-0899/0890.Find%20and%20Replace%20Pattern/README.md) | `数组`,`哈希表`,`字符串` | 中等 | | | [0891](https://leetcode-cn.com/problems/sum-of-subsequence-widths) | [子序列宽度之和](/solution/0800-0899/0891.Sum%20of%20Subsequence%20Widths/README.md) | `数组`,`数学`,`排序` | 困难 | | | [0892](https://leetcode-cn.com/problems/surface-area-of-3d-shapes) | [三维形体的表面积](/solution/0800-0899/0892.Surface%20Area%20of%203D%20Shapes/README.md) | `几何`,`数组`,`数学`,`矩阵` | 简单 | | | [0893](https://leetcode-cn.com/problems/groups-of-special-equivalent-strings) | [特殊等价字符串组](/solution/0800-0899/0893.Groups%20of%20Special-Equivalent%20Strings/README.md) | `数组`,`哈希表`,`字符串` | 中等 | | | [0894](https://leetcode-cn.com/problems/all-possible-full-binary-trees) | [所有可能的满二叉树](/solution/0800-0899/0894.All%20Possible%20Full%20Binary%20Trees/README.md) | `树`,`递归`,`记忆化搜索`,`动态规划`,`二叉树` | 中等 | | | [0895](https://leetcode-cn.com/problems/maximum-frequency-stack) | [最大频率栈](/solution/0800-0899/0895.Maximum%20Frequency%20Stack/README.md) | `栈`,`设计`,`哈希表`,`有序集合` | 困难 | | | [0896](https://leetcode-cn.com/problems/monotonic-array) | [单调数列](/solution/0800-0899/0896.Monotonic%20Array/README.md) | `数组` | 简单 | | | [0897](https://leetcode-cn.com/problems/increasing-order-search-tree) | [递增顺序搜索树](/solution/0800-0899/0897.Increasing%20Order%20Search%20Tree/README.md) | `栈`,`树`,`深度优先搜索`,`二叉搜索树`,`二叉树` | 简单 | | | [0898](https://leetcode-cn.com/problems/bitwise-ors-of-subarrays) | [子数组按位或操作](/solution/0800-0899/0898.Bitwise%20ORs%20of%20Subarrays/README.md) | `位运算`,`数组`,`动态规划` | 中等 | | | [0899](https://leetcode-cn.com/problems/orderly-queue) | [有序队列](/solution/0800-0899/0899.Orderly%20Queue/README.md) | `数学`,`字符串`,`排序` | 困难 | | | [0900](https://leetcode-cn.com/problems/rle-iterator) | [RLE 迭代器](/solution/0900-0999/0900.RLE%20Iterator/README.md) | `设计`,`数组`,`计数`,`迭代器` | 中等 | | | [0901](https://leetcode-cn.com/problems/online-stock-span) | [股票价格跨度](/solution/0900-0999/0901.Online%20Stock%20Span/README.md) | `栈`,`设计`,`数据流`,`单调栈` | 中等 | | | [0902](https://leetcode-cn.com/problems/numbers-at-most-n-given-digit-set) | [最大为 N 的数字组合](/solution/0900-0999/0902.Numbers%20At%20Most%20N%20Given%20Digit%20Set/README.md) | `数组`,`数学`,`二分查找`,`动态规划` | 困难 | | | [0903](https://leetcode-cn.com/problems/valid-permutations-for-di-sequence) | [DI 序列的有效排列](/solution/0900-0999/0903.Valid%20Permutations%20for%20DI%20Sequence/README.md) | `动态规划` | 困难 | | | [0904](https://leetcode-cn.com/problems/fruit-into-baskets) | [水果成篮](/solution/0900-0999/0904.Fruit%20Into%20Baskets/README.md) | `数组`,`哈希表`,`滑动窗口` | 中等 | | | [0905](https://leetcode-cn.com/problems/sort-array-by-parity) | [按奇偶排序数组](/solution/0900-0999/0905.Sort%20Array%20By%20Parity/README.md) | `数组`,`双指针`,`排序` | 简单 | | | [0906](https://leetcode-cn.com/problems/super-palindromes) | [超级回文数](/solution/0900-0999/0906.Super%20Palindromes/README.md) | `数学`,`枚举` | 困难 | | | [0907](https://leetcode-cn.com/problems/sum-of-subarray-minimums) | [子数组的最小值之和](/solution/0900-0999/0907.Sum%20of%20Subarray%20Minimums/README.md) | `栈`,`数组`,`动态规划`,`单调栈` | 中等 | | | [0908](https://leetcode-cn.com/problems/smallest-range-i) | [最小差值 I](/solution/0900-0999/0908.Smallest%20Range%20I/README.md) | `数组`,`数学` | 简单 | | | [0909](https://leetcode-cn.com/problems/snakes-and-ladders) | [蛇梯棋](/solution/0900-0999/0909.Snakes%20and%20Ladders/README.md) | `广度优先搜索`,`数组`,`矩阵` | 中等 | | | [0911](https://leetcode-cn.com/problems/online-election) | [在线选举](/solution/0900-0999/0911.Online%20Election/README.md) | `设计`,`数组`,`哈希表`,`二分查找` | 中等 | | | [0912](https://leetcode-cn.com/problems/sort-an-array) | [排序数组](/solution/0900-0999/0912.Sort%20an%20Array/README.md) | `数组`,`分治`,`桶排序`,`计数排序`,`基数排序`,`排序`,`堆（优先队列）`,`归并排序` | 中等 | | | [0913](https://leetcode-cn.com/problems/cat-and-mouse) | [猫和老鼠](/solution/0900-0999/0913.Cat%20and%20Mouse/README.md) | `广度优先搜索`,`图`,`记忆化搜索`,`数学`,`动态规划`,`博弈` | 困难 | | | [0914](https://leetcode-cn.com/problems/x-of-a-kind-in-a-deck-of-cards) | [卡牌分组](/solution/0900-0999/0914.X%20of%20a%20Kind%20in%20a%20Deck%20of%20Cards/README.md) | `数组`,`哈希表`,`数学`,`计数`,`数论` | 简单 | | | [0915](https://leetcode-cn.com/problems/partition-array-into-disjoint-intervals) | [分割数组](/solution/0900-0999/0915.Partition%20Array%20into%20Disjoint%20Intervals/README.md) | `数组` | 中等 | | | [0916](https://leetcode-cn.com/problems/word-subsets) | [单词子集](/solution/0900-0999/0916.Word%20Subsets/README.md) | `数组`,`哈希表`,`字符串` | 中等 | | | [0917](https://leetcode-cn.com/problems/reverse-only-letters) | [仅仅反转字母](/solution/0900-0999/0917.Reverse%20Only%20Letters/README.md) | `双指针`,`字符串` | 简单 | | | [0918](https://leetcode-cn.com/problems/maximum-sum-circular-subarray) | [环形子数组的最大和](/solution/0900-0999/0918.Maximum%20Sum%20Circular%20Subarray/README.md) | `队列`,`数组`,`分治`,`动态规划`,`单调队列` | 中等 | | | [0919](https://leetcode-cn.com/problems/complete-binary-tree-inserter) | [完全二叉树插入器](/solution/0900-0999/0919.Complete%20Binary%20Tree%20Inserter/README.md) | `树`,`广度优先搜索`,`设计`,`二叉树` | 中等 | | | [0920](https://leetcode-cn.com/problems/number-of-music-playlists) | [播放列表的数量](/solution/0900-0999/0920.Number%20of%20Music%20Playlists/README.md) | `数学`,`动态规划`,`组合数学` | 困难 | | | [0921](https://leetcode-cn.com/problems/minimum-add-to-make-parentheses-valid) | [使括号有效的最少添加](/solution/0900-0999/0921.Minimum%20Add%20to%20Make%20Parentheses%20Valid/README.md) | `栈`,`贪心`,`字符串` | 中等 | | | [0922](https://leetcode-cn.com/problems/sort-array-by-parity-ii) | [按奇偶排序数组 II](/solution/0900-0999/0922.Sort%20Array%20By%20Parity%20II/README.md) | `数组`,`双指针`,`排序` | 简单 | | | [0923](https://leetcode-cn.com/problems/3sum-with-multiplicity) | [三数之和的多种可能](/solution/0900-0999/0923.3Sum%20With%20Multiplicity/README.md) | `数组`,`哈希表`,`双指针`,`计数`,`排序` | 中等 | | | [0924](https://leetcode-cn.com/problems/minimize-malware-spread) | [尽量减少恶意软件的传播](/solution/0900-0999/0924.Minimize%20Malware%20Spread/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`数组`,`矩阵` | 困难 | | | [0925](https://leetcode-cn.com/problems/long-pressed-name) | [长按键入](/solution/0900-0999/0925.Long%20Pressed%20Name/README.md) | `双指针`,`字符串` | 简单 | | | [0926](https://leetcode-cn.com/problems/flip-string-to-monotone-increasing) | [将字符串翻转到单调递增](/solution/0900-0999/0926.Flip%20String%20to%20Monotone%20Increasing/README.md) | `字符串`,`动态规划` | 中等 | | | [0927](https://leetcode-cn.com/problems/three-equal-parts) | [三等分](/solution/0900-0999/0927.Three%20Equal%20Parts/README.md) | `数组`,`数学` | 困难 | | | [0928](https://leetcode-cn.com/problems/minimize-malware-spread-ii) | [尽量减少恶意软件的传播 II](/solution/0900-0999/0928.Minimize%20Malware%20Spread%20II/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`数组`,`矩阵` | 困难 | | | [0929](https://leetcode-cn.com/problems/unique-email-addresses) | [独特的电子邮件地址](/solution/0900-0999/0929.Unique%20Email%20Addresses/README.md) | `数组`,`哈希表`,`字符串` | 简单 | | | [0930](https://leetcode-cn.com/problems/binary-subarrays-with-sum) | [和相同的二元子数组](/solution/0900-0999/0930.Binary%20Subarrays%20With%20Sum/README.md) | `数组`,`哈希表`,`前缀和`,`滑动窗口` | 中等 | | | [0931](https://leetcode-cn.com/problems/minimum-falling-path-sum) | [下降路径最小和](/solution/0900-0999/0931.Minimum%20Falling%20Path%20Sum/README.md) | `数组`,`动态规划`,`矩阵` | 中等 | | | [0932](https://leetcode-cn.com/problems/beautiful-array) | [漂亮数组](/solution/0900-0999/0932.Beautiful%20Array/README.md) | `数组`,`数学`,`分治` | 中等 | | | [0933](https://leetcode-cn.com/problems/number-of-recent-calls) | [最近的请求次数](/solution/0900-0999/0933.Number%20of%20Recent%20Calls/README.md) | `设计`,`队列`,`数据流` | 简单 | | | [0934](https://leetcode-cn.com/problems/shortest-bridge) | [最短的桥](/solution/0900-0999/0934.Shortest%20Bridge/README.md) | `深度优先搜索`,`广度优先搜索`,`数组`,`矩阵` | 中等 | | | [0935](https://leetcode-cn.com/problems/knight-dialer) | [骑士拨号器](/solution/0900-0999/0935.Knight%20Dialer/README.md) | `动态规划` | 中等 | | | [0936](https://leetcode-cn.com/problems/stamping-the-sequence) | [戳印序列](/solution/0900-0999/0936.Stamping%20The%20Sequence/README.md) | `栈`,`贪心`,`队列`,`字符串` | 困难 | | | [0937](https://leetcode-cn.com/problems/reorder-data-in-log-files) | [重新排列日志文件](/solution/0900-0999/0937.Reorder%20Data%20in%20Log%20Files/README.md) | `数组`,`字符串`,`排序` | 简单 | | | [0938](https://leetcode-cn.com/problems/range-sum-of-bst) | [二叉搜索树的范围和](/solution/0900-0999/0938.Range%20Sum%20of%20BST/README.md) | `树`,`深度优先搜索`,`二叉搜索树`,`二叉树` | 简单 | | | [0939](https://leetcode-cn.com/problems/minimum-area-rectangle) | [最小面积矩形](/solution/0900-0999/0939.Minimum%20Area%20Rectangle/README.md) | `几何`,`数组`,`哈希表`,`数学`,`排序` | 中等 | | | [0940](https://leetcode-cn.com/problems/distinct-subsequences-ii) | [不同的子序列 II](/solution/0900-0999/0940.Distinct%20Subsequences%20II/README.md) | `字符串`,`动态规划` | 困难 | | | [0941](https://leetcode-cn.com/problems/valid-mountain-array) | [有效的山脉数组](/solution/0900-0999/0941.Valid%20Mountain%20Array/README.md) | `数组` | 简单 | | | [0942](https://leetcode-cn.com/problems/di-string-match) | [增减字符串匹配](/solution/0900-0999/0942.DI%20String%20Match/README.md) | `贪心`,`数组`,`数学`,`双指针`,`字符串` | 简单 | | | [0943](https://leetcode-cn.com/problems/find-the-shortest-superstring) | [最短超级串](/solution/0900-0999/0943.Find%20the%20Shortest%20Superstring/README.md) | `位运算`,`数组`,`字符串`,`动态规划`,`状态压缩` | 困难 | | | [0944](https://leetcode-cn.com/problems/delete-columns-to-make-sorted) | [删列造序](/solution/0900-0999/0944.Delete%20Columns%20to%20Make%20Sorted/README.md) | `数组`,`字符串` | 简单 | | | [0945](https://leetcode-cn.com/problems/minimum-increment-to-make-array-unique) | [使数组唯一的最小增量](/solution/0900-0999/0945.Minimum%20Increment%20to%20Make%20Array%20Unique/README.md) | `贪心`,`数组`,`计数`,`排序` | 中等 | | | [0946](https://leetcode-cn.com/problems/validate-stack-sequences) | [验证栈序列](/solution/0900-0999/0946.Validate%20Stack%20Sequences/README.md) | `栈`,`数组`,`模拟` | 中等 | | | [0947](https://leetcode-cn.com/problems/most-stones-removed-with-same-row-or-column) | [移除最多的同行或同列石头](/solution/0900-0999/0947.Most%20Stones%20Removed%20with%20Same%20Row%20or%20Column/README.md) | `深度优先搜索`,`并查集`,`图` | 中等 | | | [0948](https://leetcode-cn.com/problems/bag-of-tokens) | [令牌放置](/solution/0900-0999/0948.Bag%20of%20Tokens/README.md) | `贪心`,`数组`,`双指针`,`排序` | 中等 | | | [0949](https://leetcode-cn.com/problems/largest-time-for-given-digits) | [给定数字能组成的最大时间](/solution/0900-0999/0949.Largest%20Time%20for%20Given%20Digits/README.md) | `字符串`,`枚举` | 中等 | | | [0950](https://leetcode-cn.com/problems/reveal-cards-in-increasing-order) | [按递增顺序显示卡牌](/solution/0900-0999/0950.Reveal%20Cards%20In%20Increasing%20Order/README.md) | `队列`,`数组`,`排序`,`模拟` | 中等 | | | [0951](https://leetcode-cn.com/problems/flip-equivalent-binary-trees) | [翻转等价二叉树](/solution/0900-0999/0951.Flip%20Equivalent%20Binary%20Trees/README.md) | `树`,`深度优先搜索`,`二叉树` | 中等 | | | [0952](https://leetcode-cn.com/problems/largest-component-size-by-common-factor) | [按公因数计算最大组件大小](/solution/0900-0999/0952.Largest%20Component%20Size%20by%20Common%20Factor/README.md) | `并查集`,`数组`,`数学` | 困难 | | | [0953](https://leetcode-cn.com/problems/verifying-an-alien-dictionary) | [验证外星语词典](/solution/0900-0999/0953.Verifying%20an%20Alien%20Dictionary/README.md) | `数组`,`哈希表`,`字符串` | 简单 | | | [0954](https://leetcode-cn.com/problems/array-of-doubled-pairs) | [二倍数对数组](/solution/0900-0999/0954.Array%20of%20Doubled%20Pairs/README.md) | `贪心`,`数组`,`哈希表`,`排序` | 中等 | | | [0955](https://leetcode-cn.com/problems/delete-columns-to-make-sorted-ii) | [删列造序 II](/solution/0900-0999/0955.Delete%20Columns%20to%20Make%20Sorted%20II/README.md) | `贪心`,`数组`,`字符串` | 中等 | | | [0956](https://leetcode-cn.com/problems/tallest-billboard) | [最高的广告牌](/solution/0900-0999/0956.Tallest%20Billboard/README.md) | `数组`,`动态规划` | 困难 | | | [0957](https://leetcode-cn.com/problems/prison-cells-after-n-days) | [N 天后的牢房](/solution/0900-0999/0957.Prison%20Cells%20After%20N%20Days/README.md) | `位运算`,`数组`,`哈希表`,`数学` | 中等 | | | [0958](https://leetcode-cn.com/problems/check-completeness-of-a-binary-tree) | [二叉树的完全性检验](/solution/0900-0999/0958.Check%20Completeness%20of%20a%20Binary%20Tree/README.md) | `树`,`广度优先搜索`,`二叉树` | 中等 | | | [0959](https://leetcode-cn.com/problems/regions-cut-by-slashes) | [由斜杠划分区域](/solution/0900-0999/0959.Regions%20Cut%20By%20Slashes/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`图` | 中等 | | | [0960](https://leetcode-cn.com/problems/delete-columns-to-make-sorted-iii) | [删列造序 III](/solution/0900-0999/0960.Delete%20Columns%20to%20Make%20Sorted%20III/README.md) | `数组`,`字符串`,`动态规划` | 困难 | | | [0961](https://leetcode-cn.com/problems/n-repeated-element-in-size-2n-array) | [在长度 2N 的数组中找出重复 N 次的元素](/solution/0900-0999/0961.N-Repeated%20Element%20in%20Size%202N%20Array/README.md) | `数组`,`哈希表` | 简单 | | | [0962](https://leetcode-cn.com/problems/maximum-width-ramp) | [最大宽度坡](/solution/0900-0999/0962.Maximum%20Width%20Ramp/README.md) | `栈`,`数组`,`单调栈` | 中等 | | | [0963](https://leetcode-cn.com/problems/minimum-area-rectangle-ii) | [最小面积矩形 II](/solution/0900-0999/0963.Minimum%20Area%20Rectangle%20II/README.md) | `几何`,`数组`,`数学` | 中等 | | | [0964](https://leetcode-cn.com/problems/least-operators-to-express-number) | [表示数字的最少运算符](/solution/0900-0999/0964.Least%20Operators%20to%20Express%20Number/README.md) | `数学`,`动态规划` | 困难 | | | [0965](https://leetcode-cn.com/problems/univalued-binary-tree) | [单值二叉树](/solution/0900-0999/0965.Univalued%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉树` | 简单 | | | [0966](https://leetcode-cn.com/problems/vowel-spellchecker) | [元音拼写检查器](/solution/0900-0999/0966.Vowel%20Spellchecker/README.md) | `数组`,`哈希表`,`字符串` | 中等 | | | [0967](https://leetcode-cn.com/problems/numbers-with-same-consecutive-differences) | [连续差相同的数字](/solution/0900-0999/0967.Numbers%20With%20Same%20Consecutive%20Differences/README.md) | `广度优先搜索`,`回溯` | 中等 | | | [0968](https://leetcode-cn.com/problems/binary-tree-cameras) | [监控二叉树](/solution/0900-0999/0968.Binary%20Tree%20Cameras/README.md) | `树`,`深度优先搜索`,`动态规划`,`二叉树` | 困难 | | | [0969](https://leetcode-cn.com/problems/pancake-sorting) | [煎饼排序](/solution/0900-0999/0969.Pancake%20Sorting/README.md) | `贪心`,`数组`,`双指针`,`排序` | 中等 | | | [0970](https://leetcode-cn.com/problems/powerful-integers) | [强整数](/solution/0900-0999/0970.Powerful%20Integers/README.md) | `哈希表`,`数学` | 中等 | | | [0971](https://leetcode-cn.com/problems/flip-binary-tree-to-match-preorder-traversal) | [翻转二叉树以匹配先序遍历](/solution/0900-0999/0971.Flip%20Binary%20Tree%20To%20Match%20Preorder%20Traversal/README.md) | `树`,`深度优先搜索`,`二叉树` | 中等 | | | [0972](https://leetcode-cn.com/problems/equal-rational-numbers) | [相等的有理数](/solution/0900-0999/0972.Equal%20Rational%20Numbers/README.md) | `数学`,`字符串` | 困难 | | | [0973](https://leetcode-cn.com/problems/k-closest-points-to-origin) | [最接近原点的 K 个点](/solution/0900-0999/0973.K%20Closest%20Points%20to%20Origin/README.md) | `几何`,`数组`,`数学`,`分治`,`快速选择`,`排序`,`堆（优先队列）` | 中等 | | | [0974](https://leetcode-cn.com/problems/subarray-sums-divisible-by-k) | [和可被 K 整除的子数组](/solution/0900-0999/0974.Subarray%20Sums%20Divisible%20by%20K/README.md) | `数组`,`哈希表`,`前缀和` | 中等 | | | [0975](https://leetcode-cn.com/problems/odd-even-jump) | [奇偶跳](/solution/0900-0999/0975.Odd%20Even%20Jump/README.md) | `栈`,`数组`,`动态规划`,`有序集合`,`单调栈` | 困难 | | | [0976](https://leetcode-cn.com/problems/largest-perimeter-triangle) | [三角形的最大周长](/solution/0900-0999/0976.Largest%20Perimeter%20Triangle/README.md) | `贪心`,`数组`,`数学`,`排序` | 简单 | | | [0977](https://leetcode-cn.com/problems/squares-of-a-sorted-array) | [有序数组的平方](/solution/0900-0999/0977.Squares%20of%20a%20Sorted%20Array/README.md) | `数组`,`双指针`,`排序` | 简单 | | | [0978](https://leetcode-cn.com/problems/longest-turbulent-subarray) | [最长湍流子数组](/solution/0900-0999/0978.Longest%20Turbulent%20Subarray/README.md) | `数组`,`动态规划`,`滑动窗口` | 中等 | | | [0979](https://leetcode-cn.com/problems/distribute-coins-in-binary-tree) | [在二叉树中分配硬币](/solution/0900-0999/0979.Distribute%20Coins%20in%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`二叉树` | 中等 | | | [0980](https://leetcode-cn.com/problems/unique-paths-iii) | [不同路径 III](/solution/0900-0999/0980.Unique%20Paths%20III/README.md) | `位运算`,`数组`,`回溯`,`矩阵` | 困难 | | | [0981](https://leetcode-cn.com/problems/time-based-key-value-store) | [基于时间的键值存储](/solution/0900-0999/0981.Time%20Based%20Key-Value%20Store/README.md) | `设计`,`哈希表`,`字符串`,`二分查找` | 中等 | | | [0982](https://leetcode-cn.com/problems/triples-with-bitwise-and-equal-to-zero) | [按位与为零的三元组](/solution/0900-0999/0982.Triples%20with%20Bitwise%20AND%20Equal%20To%20Zero/README.md) | `位运算`,`数组`,`哈希表` | 困难 | | | [0983](https://leetcode-cn.com/problems/minimum-cost-for-tickets) | [最低票价](/solution/0900-0999/0983.Minimum%20Cost%20For%20Tickets/README.md) | `数组`,`动态规划` | 中等 | | | [0984](https://leetcode-cn.com/problems/string-without-aaa-or-bbb) | [不含 AAA 或 BBB 的字符串](/solution/0900-0999/0984.String%20Without%20AAA%20or%20BBB/README.md) | `贪心`,`字符串` | 中等 | | | [0985](https://leetcode-cn.com/problems/sum-of-even-numbers-after-queries) | [查询后的偶数和](/solution/0900-0999/0985.Sum%20of%20Even%20Numbers%20After%20Queries/README.md) | `数组`,`模拟` | 中等 | | | [0986](https://leetcode-cn.com/problems/interval-list-intersections) | [区间列表的交集](/solution/0900-0999/0986.Interval%20List%20Intersections/README.md) | `数组`,`双指针` | 中等 | | | [0987](https://leetcode-cn.com/problems/vertical-order-traversal-of-a-binary-tree) | [二叉树的垂序遍历](/solution/0900-0999/0987.Vertical%20Order%20Traversal%20of%20a%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`哈希表`,`二叉树` | 困难 | | | [0988](https://leetcode-cn.com/problems/smallest-string-starting-from-leaf) | [从叶结点开始的最小字符串](/solution/0900-0999/0988.Smallest%20String%20Starting%20From%20Leaf/README.md) | `树`,`深度优先搜索`,`字符串`,`二叉树` | 中等 | | | [0989](https://leetcode-cn.com/problems/add-to-array-form-of-integer) | [数组形式的整数加法](/solution/0900-0999/0989.Add%20to%20Array-Form%20of%20Integer/README.md) | `数组`,`数学` | 简单 | | | [0990](https://leetcode-cn.com/problems/satisfiability-of-equality-equations) | [等式方程的可满足性](/solution/0900-0999/0990.Satisfiability%20of%20Equality%20Equations/README.md) | `并查集`,`图`,`数组`,`字符串` | 中等 | | | [0991](https://leetcode-cn.com/problems/broken-calculator) | [坏了的计算器](/solution/0900-0999/0991.Broken%20Calculator/README.md) | `贪心`,`数学` | 中等 | | | [0992](https://leetcode-cn.com/problems/subarrays-with-k-different-integers) | [K 个不同整数的子数组](/solution/0900-0999/0992.Subarrays%20with%20K%20Different%20Integers/README.md) | `数组`,`哈希表`,`计数`,`滑动窗口` | 困难 | | | [0993](https://leetcode-cn.com/problems/cousins-in-binary-tree) | [二叉树的堂兄弟节点](/solution/0900-0999/0993.Cousins%20in%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉树` | 简单 | | | [0994](https://leetcode-cn.com/problems/rotting-oranges) | [腐烂的橘子](/solution/0900-0999/0994.Rotting%20Oranges/README.md) | `广度优先搜索`,`数组`,`矩阵` | 中等 | | | [0995](https://leetcode-cn.com/problems/minimum-number-of-k-consecutive-bit-flips) | [K 连续位的最小翻转次数](/solution/0900-0999/0995.Minimum%20Number%20of%20K%20Consecutive%20Bit%20Flips/README.md) | `位运算`,`数组`,`前缀和`,`滑动窗口` | 困难 | | | [0996](https://leetcode-cn.com/problems/number-of-squareful-arrays) | [正方形数组的数目](/solution/0900-0999/0996.Number%20of%20Squareful%20Arrays/README.md) | `位运算`,`数组`,`数学`,`动态规划`,`回溯`,`状态压缩` | 困难 | | | [0997](https://leetcode-cn.com/problems/find-the-town-judge) | [找到小镇的法官](/solution/0900-0999/0997.Find%20the%20Town%20Judge/README.md) | `图`,`数组`,`哈希表` | 简单 | | | [0998](https://leetcode-cn.com/problems/maximum-binary-tree-ii) | [最大二叉树 II](/solution/0900-0999/0998.Maximum%20Binary%20Tree%20II/README.md) | `树`,`二叉树` | 中等 | | | [0999](https://leetcode-cn.com/problems/available-captures-for-rook) | [可以被一步捕获的棋子数](/solution/0900-0999/0999.Available%20Captures%20for%20Rook/README.md) | `数组`,`矩阵`,`模拟` | 简单 | | | [1000](https://leetcode-cn.com/problems/minimum-cost-to-merge-stones) | [合并石头的最低成本](/solution/1000-1099/1000.Minimum%20Cost%20to%20Merge%20Stones/README.md) | `数组`,`动态规划` | 困难 | | | [1001](https://leetcode-cn.com/problems/grid-illumination) | [网格照明](/solution/1000-1099/1001.Grid%20Illumination/README.md) | `数组`,`哈希表` | 困难 | | | [1002](https://leetcode-cn.com/problems/find-common-characters) | [查找共用字符](/solution/1000-1099/1002.Find%20Common%20Characters/README.md) | `数组`,`哈希表`,`字符串` | 简单 | | | [1003](https://leetcode-cn.com/problems/check-if-word-is-valid-after-substitutions) | [检查替换后的词是否有效](/solution/1000-1099/1003.Check%20If%20Word%20Is%20Valid%20After%20Substitutions/README.md) | `栈`,`字符串` | 中等 | | | [1004](https://leetcode-cn.com/problems/max-consecutive-ones-iii) | [最大连续 1 的个数 III](/solution/1000-1099/1004.Max%20Consecutive%20Ones%20III/README.md) | `数组`,`二分查找`,`前缀和`,`滑动窗口` | 中等 | | | [1005](https://leetcode-cn.com/problems/maximize-sum-of-array-after-k-negations) | [K 次取反后最大化的数组和](/solution/1000-1099/1005.Maximize%20Sum%20Of%20Array%20After%20K%20Negations/README.md) | `贪心`,`数组`,`排序` | 简单 | | | [1006](https://leetcode-cn.com/problems/clumsy-factorial) | [笨阶乘](/solution/1000-1099/1006.Clumsy%20Factorial/README.md) | `栈`,`数学`,`模拟` | 中等 | | | [1007](https://leetcode-cn.com/problems/minimum-domino-rotations-for-equal-row) | [行相等的最少多米诺旋转](/solution/1000-1099/1007.Minimum%20Domino%20Rotations%20For%20Equal%20Row/README.md) | `贪心`,`数组` | 中等 | | | [1008](https://leetcode-cn.com/problems/construct-binary-search-tree-from-preorder-traversal) | [前序遍历构造二叉搜索树](/solution/1000-1099/1008.Construct%20Binary%20Search%20Tree%20from%20Preorder%20Traversal/README.md) | `栈`,`树`,`二叉搜索树`,`数组`,`二叉树`,`单调栈` | 中等 | | | [1009](https://leetcode-cn.com/problems/complement-of-base-10-integer) | [十进制整数的反码](/solution/1000-1099/1009.Complement%20of%20Base%2010%20Integer/README.md) | `位运算` | 简单 | | | [1010](https://leetcode-cn.com/problems/pairs-of-songs-with-total-durations-divisible-by-60) | [总持续时间可被 60 整除的歌曲](/solution/1000-1099/1010.Pairs%20of%20Songs%20With%20Total%20Durations%20Divisible%20by%2060/README.md) | `数组`,`哈希表`,`计数` | 中等 | | | [1011](https://leetcode-cn.com/problems/capacity-to-ship-packages-within-d-days) | [在 D 天内送达包裹的能力](/solution/1000-1099/1011.Capacity%20To%20Ship%20Packages%20Within%20D%20Days/README.md) | `贪心`,`数组`,`二分查找` | 中等 | | | [1012](https://leetcode-cn.com/problems/numbers-with-repeated-digits) | [至少有 1 位重复的数字](/solution/1000-1099/1012.Numbers%20With%20Repeated%20Digits/README.md) | `数学`,`动态规划` | 困难 | | | [1013](https://leetcode-cn.com/problems/partition-array-into-three-parts-with-equal-sum) | [将数组分成和相等的三个部分](/solution/1000-1099/1013.Partition%20Array%20Into%20Three%20Parts%20With%20Equal%20Sum/README.md) | `贪心`,`数组` | 简单 | | | [1014](https://leetcode-cn.com/problems/best-sightseeing-pair) | [最佳观光组合](/solution/1000-1099/1014.Best%20Sightseeing%20Pair/README.md) | `数组`,`动态规划` | 中等 | | | [1015](https://leetcode-cn.com/problems/smallest-integer-divisible-by-k) | [可被 K 整除的最小整数](/solution/1000-1099/1015.Smallest%20Integer%20Divisible%20by%20K/README.md) | `哈希表`,`数学` | 中等 | | | [1016](https://leetcode-cn.com/problems/binary-string-with-substrings-representing-1-to-n) | [子串能表示从 1 到 N 数字的二进制串](/solution/1000-1099/1016.Binary%20String%20With%20Substrings%20Representing%201%20To%20N/README.md) | `字符串` | 中等 | | | [1017](https://leetcode-cn.com/problems/convert-to-base-2) | [负二进制转换](/solution/1000-1099/1017.Convert%20to%20Base%20-2/README.md) | `数学` | 中等 | | | [1018](https://leetcode-cn.com/problems/binary-prefix-divisible-by-5) | [可被 5 整除的二进制前缀](/solution/1000-1099/1018.Binary%20Prefix%20Divisible%20By%205/README.md) | `数组` | 简单 | | | [1019](https://leetcode-cn.com/problems/next-greater-node-in-linked-list) | [链表中的下一个更大节点](/solution/1000-1099/1019.Next%20Greater%20Node%20In%20Linked%20List/README.md) | `栈`,`数组`,`链表`,`单调栈` | 中等 | | | [1020](https://leetcode-cn.com/problems/number-of-enclaves) | [飞地的数量](/solution/1000-1099/1020.Number%20of%20Enclaves/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`数组`,`矩阵` | 中等 | | | [1021](https://leetcode-cn.com/problems/remove-outermost-parentheses) | [删除最外层的括号](/solution/1000-1099/1021.Remove%20Outermost%20Parentheses/README.md) | `栈`,`字符串` | 简单 | | | [1022](https://leetcode-cn.com/problems/sum-of-root-to-leaf-binary-numbers) | [从根到叶的二进制数之和](/solution/1000-1099/1022.Sum%20of%20Root%20To%20Leaf%20Binary%20Numbers/README.md) | `树`,`深度优先搜索`,`二叉树` | 简单 | | | [1023](https://leetcode-cn.com/problems/camelcase-matching) | [驼峰式匹配](/solution/1000-1099/1023.Camelcase%20Matching/README.md) | `字典树`,`双指针`,`字符串`,`字符串匹配` | 中等 | | | [1024](https://leetcode-cn.com/problems/video-stitching) | [视频拼接](/solution/1000-1099/1024.Video%20Stitching/README.md) | `贪心`,`数组`,`动态规划` | 中等 | | | [1025](https://leetcode-cn.com/problems/divisor-game) | [除数博弈](/solution/1000-1099/1025.Divisor%20Game/README.md) | `脑筋急转弯`,`数学`,`动态规划`,`博弈` | 简单 | | | [1026](https://leetcode-cn.com/problems/maximum-difference-between-node-and-ancestor) | [节点与其祖先之间的最大差值](/solution/1000-1099/1026.Maximum%20Difference%20Between%20Node%20and%20Ancestor/README.md) | `树`,`深度优先搜索`,`二叉树` | 中等 | | | [1027](https://leetcode-cn.com/problems/longest-arithmetic-subsequence) | [最长等差数列](/solution/1000-1099/1027.Longest%20Arithmetic%20Subsequence/README.md) | `数组`,`哈希表`,`二分查找`,`动态规划` | 中等 | | | [1028](https://leetcode-cn.com/problems/recover-a-tree-from-preorder-traversal) | [从先序遍历还原二叉树](/solution/1000-1099/1028.Recover%20a%20Tree%20From%20Preorder%20Traversal/README.md) | `树`,`深度优先搜索`,`字符串`,`二叉树` | 困难 | | | [1029](https://leetcode-cn.com/problems/two-city-scheduling) | [两地调度](/solution/1000-1099/1029.Two%20City%20Scheduling/README.md) | `贪心`,`数组`,`排序` | 中等 | | | [1030](https://leetcode-cn.com/problems/matrix-cells-in-distance-order) | [距离顺序排列矩阵单元格](/solution/1000-1099/1030.Matrix%20Cells%20in%20Distance%20Order/README.md) | `几何`,`数组`,`数学`,`矩阵`,`排序` | 简单 | | | [1031](https://leetcode-cn.com/problems/maximum-sum-of-two-non-overlapping-subarrays) | [两个非重叠子数组的最大和](/solution/1000-1099/1031.Maximum%20Sum%20of%20Two%20Non-Overlapping%20Subarrays/README.md) | `数组`,`动态规划`,`滑动窗口` | 中等 | | | [1032](https://leetcode-cn.com/problems/stream-of-characters) | [字符流](/solution/1000-1099/1032.Stream%20of%20Characters/README.md) | `设计`,`字典树`,`数组`,`字符串`,`数据流` | 困难 | | | [1033](https://leetcode-cn.com/problems/moving-stones-until-consecutive) | [移动石子直到连续](/solution/1000-1099/1033.Moving%20Stones%20Until%20Consecutive/README.md) | `脑筋急转弯`,`数学` | 中等 | | | [1034](https://leetcode-cn.com/problems/coloring-a-border) | [边界着色](/solution/1000-1099/1034.Coloring%20A%20Border/README.md) | `深度优先搜索`,`广度优先搜索`,`数组`,`矩阵` | 中等 | | | [1035](https://leetcode-cn.com/problems/uncrossed-lines) | [不相交的线](/solution/1000-1099/1035.Uncrossed%20Lines/README.md) | `数组`,`动态规划` | 中等 | | | [1036](https://leetcode-cn.com/problems/escape-a-large-maze) | [逃离大迷宫](/solution/1000-1099/1036.Escape%20a%20Large%20Maze/README.md) | `深度优先搜索`,`广度优先搜索`,`数组`,`哈希表` | 困难 | | | [1037](https://leetcode-cn.com/problems/valid-boomerang) | [有效的回旋镖](/solution/1000-1099/1037.Valid%20Boomerang/README.md) | `几何`,`数学` | 简单 | | | [1038](https://leetcode-cn.com/problems/binary-search-tree-to-greater-sum-tree) | [从二叉搜索树到更大和树](/solution/1000-1099/1038.Binary%20Search%20Tree%20to%20Greater%20Sum%20Tree/README.md) | `树`,`深度优先搜索`,`二叉搜索树`,`二叉树` | 中等 | | | [1039](https://leetcode-cn.com/problems/minimum-score-triangulation-of-polygon) | [多边形三角剖分的最低得分](/solution/1000-1099/1039.Minimum%20Score%20Triangulation%20of%20Polygon/README.md) | `数组`,`动态规划` | 中等 | | | [1040](https://leetcode-cn.com/problems/moving-stones-until-consecutive-ii) | [移动石子直到连续 II](/solution/1000-1099/1040.Moving%20Stones%20Until%20Consecutive%20II/README.md) | `数组`,`数学`,`双指针`,`排序` | 中等 | | | [1041](https://leetcode-cn.com/problems/robot-bounded-in-circle) | [困于环中的机器人](/solution/1000-1099/1041.Robot%20Bounded%20In%20Circle/README.md) | `数学`,`字符串`,`模拟` | 中等 | | | [1042](https://leetcode-cn.com/problems/flower-planting-with-no-adjacent) | [不邻接植花](/solution/1000-1099/1042.Flower%20Planting%20With%20No%20Adjacent/README.md) | `深度优先搜索`,`广度优先搜索`,`图` | 中等 | | | [1043](https://leetcode-cn.com/problems/partition-array-for-maximum-sum) | [分隔数组以得到最大和](/solution/1000-1099/1043.Partition%20Array%20for%20Maximum%20Sum/README.md) | `数组`,`动态规划` | 中等 | | | [1044](https://leetcode-cn.com/problems/longest-duplicate-substring) | [最长重复子串](/solution/1000-1099/1044.Longest%20Duplicate%20Substring/README.md) | `字符串`,`二分查找`,`后缀数组`,`滑动窗口`,`哈希函数`,`滚动哈希` | 困难 | | | [1045](https://leetcode-cn.com/problems/customers-who-bought-all-products) | [买下所有产品的客户](/solution/1000-1099/1045.Customers%20Who%20Bought%20All%20Products/README.md) | `数据库` | 中等 | 🔒 | | [1046](https://leetcode-cn.com/problems/last-stone-weight) | [最后一块石头的重量](/solution/1000-1099/1046.Last%20Stone%20Weight/README.md) | `数组`,`堆（优先队列）` | 简单 | | | [1047](https://leetcode-cn.com/problems/remove-all-adjacent-duplicates-in-string) | [删除字符串中的所有相邻重复项](/solution/1000-1099/1047.Remove%20All%20Adjacent%20Duplicates%20In%20String/README.md) | `栈`,`字符串` | 简单 | | | [1048](https://leetcode-cn.com/problems/longest-string-chain) | [最长字符串链](/solution/1000-1099/1048.Longest%20String%20Chain/README.md) | `数组`,`哈希表`,`双指针`,`字符串`,`动态规划` | 中等 | | | [1049](https://leetcode-cn.com/problems/last-stone-weight-ii) | [最后一块石头的重量 II](/solution/1000-1099/1049.Last%20Stone%20Weight%20II/README.md) | `数组`,`动态规划` | 中等 | | | [1050](https://leetcode-cn.com/problems/actors-and-directors-who-cooperated-at-least-three-times) | [合作过至少三次的演员和导演](/solution/1000-1099/1050.Actors%20and%20Directors%20Who%20Cooperated%20At%20Least%20Three%20Times/README.md) | `数据库` | 简单 | | | [1051](https://leetcode-cn.com/problems/height-checker) | [高度检查器](/solution/1000-1099/1051.Height%20Checker/README.md) | `数组`,`计数排序`,`排序` | 简单 | | | [1052](https://leetcode-cn.com/problems/grumpy-bookstore-owner) | [爱生气的书店老板](/solution/1000-1099/1052.Grumpy%20Bookstore%20Owner/README.md) | `数组`,`滑动窗口` | 中等 | | | [1053](https://leetcode-cn.com/problems/previous-permutation-with-one-swap) | [交换一次的先前排列](/solution/1000-1099/1053.Previous%20Permutation%20With%20One%20Swap/README.md) | `贪心`,`数组` | 中等 | | | [1054](https://leetcode-cn.com/problems/distant-barcodes) | [距离相等的条形码](/solution/1000-1099/1054.Distant%20Barcodes/README.md) | `贪心`,`数组`,`哈希表`,`计数`,`排序`,`堆（优先队列）` | 中等 | | | [1055](https://leetcode-cn.com/problems/shortest-way-to-form-string) | [形成字符串的最短路径](/solution/1000-1099/1055.Shortest%20Way%20to%20Form%20String/README.md) | `贪心`,`字符串`,`动态规划` | 中等 | 🔒 | | [1056](https://leetcode-cn.com/problems/confusing-number) | [易混淆数](/solution/1000-1099/1056.Confusing%20Number/README.md) | `数学` | 简单 | 🔒 | | [1057](https://leetcode-cn.com/problems/campus-bikes) | [校园自行车分配](/solution/1000-1099/1057.Campus%20Bikes/README.md) | `贪心`,`数组`,`排序` | 中等 | 🔒 | | [1058](https://leetcode-cn.com/problems/minimize-rounding-error-to-meet-target) | [最小化舍入误差以满足目标](/solution/1000-1099/1058.Minimize%20Rounding%20Error%20to%20Meet%20Target/README.md) | `贪心`,`数组`,`数学`,`字符串` | 中等 | 🔒 | | [1059](https://leetcode-cn.com/problems/all-paths-from-source-lead-to-destination) | [从始点到终点的所有路径](/solution/1000-1099/1059.All%20Paths%20from%20Source%20Lead%20to%20Destination/README.md) | `深度优先搜索`,`图` | 中等 | 🔒 | | [1060](https://leetcode-cn.com/problems/missing-element-in-sorted-array) | [有序数组中的缺失元素](/solution/1000-1099/1060.Missing%20Element%20in%20Sorted%20Array/README.md) | `数组`,`二分查找` | 中等 | 🔒 | | [1061](https://leetcode-cn.com/problems/lexicographically-smallest-equivalent-string) | [按字典序排列最小的等效字符串](/solution/1000-1099/1061.Lexicographically%20Smallest%20Equivalent%20String/README.md) | `并查集`,`字符串` | 中等 | 🔒 | | [1062](https://leetcode-cn.com/problems/longest-repeating-substring) | [最长重复子串](/solution/1000-1099/1062.Longest%20Repeating%20Substring/README.md) | `字符串`,`二分查找`,`动态规划`,`后缀数组`,`哈希函数`,`滚动哈希` | 中等 | 🔒 | | [1063](https://leetcode-cn.com/problems/number-of-valid-subarrays) | [有效子数组的数目](/solution/1000-1099/1063.Number%20of%20Valid%20Subarrays/README.md) | `栈`,`数组`,`单调栈` | 困难 | 🔒 | | [1064](https://leetcode-cn.com/problems/fixed-point) | [不动点](/solution/1000-1099/1064.Fixed%20Point/README.md) | `数组`,`二分查找` | 简单 | 🔒 | | [1065](https://leetcode-cn.com/problems/index-pairs-of-a-string) | [字符串的索引对](/solution/1000-1099/1065.Index%20Pairs%20of%20a%20String/README.md) | `字典树`,`数组`,`字符串`,`排序` | 简单 | 🔒 | | [1066](https://leetcode-cn.com/problems/campus-bikes-ii) | [校园自行车分配 II](/solution/1000-1099/1066.Campus%20Bikes%20II/README.md) | `位运算`,`数组`,`动态规划`,`回溯`,`状态压缩` | 中等 | 🔒 | | [1067](https://leetcode-cn.com/problems/digit-count-in-range) | [范围内的数字计数](/solution/1000-1099/1067.Digit%20Count%20in%20Range/README.md) | `数学`,`动态规划` | 困难 | 🔒 | | [1068](https://leetcode-cn.com/problems/product-sales-analysis-i) | [产品销售分析 I](/solution/1000-1099/1068.Product%20Sales%20Analysis%20I/README.md) | `数据库` | 简单 | 🔒 | | [1069](https://leetcode-cn.com/problems/product-sales-analysis-ii) | [产品销售分析 II](/solution/1000-1099/1069.Product%20Sales%20Analysis%20II/README.md) | `数据库` | 简单 | 🔒 | | [1070](https://leetcode-cn.com/problems/product-sales-analysis-iii) | [产品销售分析 III](/solution/1000-1099/1070.Product%20Sales%20Analysis%20III/README.md) | `数据库` | 中等 | 🔒 | | [1071](https://leetcode-cn.com/problems/greatest-common-divisor-of-strings) | [字符串的最大公因子](/solution/1000-1099/1071.Greatest%20Common%20Divisor%20of%20Strings/README.md) | `数学`,`字符串` | 简单 | | | [1072](https://leetcode-cn.com/problems/flip-columns-for-maximum-number-of-equal-rows) | [按列翻转得到最大值等行数](/solution/1000-1099/1072.Flip%20Columns%20For%20Maximum%20Number%20of%20Equal%20Rows/README.md) | `数组`,`哈希表`,`矩阵` | 中等 | | | [1073](https://leetcode-cn.com/problems/adding-two-negabinary-numbers) | [负二进制数相加](/solution/1000-1099/1073.Adding%20Two%20Negabinary%20Numbers/README.md) | `数组`,`数学` | 中等 | | | [1074](https://leetcode-cn.com/problems/number-of-submatrices-that-sum-to-target) | [元素和为目标值的子矩阵数量](/solution/1000-1099/1074.Number%20of%20Submatrices%20That%20Sum%20to%20Target/README.md) | `数组`,`哈希表`,`矩阵`,`前缀和` | 困难 | | | [1075](https://leetcode-cn.com/problems/project-employees-i) | [项目员工 I](/solution/1000-1099/1075.Project%20Employees%20I/README.md) | `数据库` | 简单 | 🔒 | | [1076](https://leetcode-cn.com/problems/project-employees-ii) | [项目员工 II](/solution/1000-1099/1076.Project%20Employees%20II/README.md) | `数据库` | 简单 | 🔒 | | [1077](https://leetcode-cn.com/problems/project-employees-iii) | [项目员工 III](/solution/1000-1099/1077.Project%20Employees%20III/README.md) | `数据库` | 中等 | 🔒 | | [1078](https://leetcode-cn.com/problems/occurrences-after-bigram) | [Bigram 分词](/solution/1000-1099/1078.Occurrences%20After%20Bigram/README.md) | `字符串` | 简单 | | | [1079](https://leetcode-cn.com/problems/letter-tile-possibilities) | [活字印刷](/solution/1000-1099/1079.Letter%20Tile%20Possibilities/README.md) | `字符串`,`回溯` | 中等 | | | [1080](https://leetcode-cn.com/problems/insufficient-nodes-in-root-to-leaf-paths) | [根到叶路径上的不足节点](/solution/1000-1099/1080.Insufficient%20Nodes%20in%20Root%20to%20Leaf%20Paths/README.md) | `树`,`深度优先搜索`,`二叉树` | 中等 | | | [1081](https://leetcode-cn.com/problems/smallest-subsequence-of-distinct-characters) | [不同字符的最小子序列](/solution/1000-1099/1081.Smallest%20Subsequence%20of%20Distinct%20Characters/README.md) | `栈`,`贪心`,`字符串`,`单调栈` | 中等 | | | [1082](https://leetcode-cn.com/problems/sales-analysis-i) | [销售分析 I ](/solution/1000-1099/1082.Sales%20Analysis%20I/README.md) | `数据库` | 简单 | 🔒 | | [1083](https://leetcode-cn.com/problems/sales-analysis-ii) | [销售分析 II](/solution/1000-1099/1083.Sales%20Analysis%20II/README.md) | `数据库` | 简单 | 🔒 | | [1084](https://leetcode-cn.com/problems/sales-analysis-iii) | [销售分析 III](/solution/1000-1099/1084.Sales%20Analysis%20III/README.md) | `数据库` | 简单 | | | [1085](https://leetcode-cn.com/problems/sum-of-digits-in-the-minimum-number) | [最小元素各数位之和](/solution/1000-1099/1085.Sum%20of%20Digits%20in%20the%20Minimum%20Number/README.md) | `数组`,`数学` | 简单 | 🔒 | | [1086](https://leetcode-cn.com/problems/high-five) | [前五科的均分](/solution/1000-1099/1086.High%20Five/README.md) | `数组`,`哈希表`,`排序` | 简单 | 🔒 | | [1087](https://leetcode-cn.com/problems/brace-expansion) | [花括号展开](/solution/1000-1099/1087.Brace%20Expansion/README.md) | `广度优先搜索`,`字符串`,`回溯` | 中等 | 🔒 | | [1088](https://leetcode-cn.com/problems/confusing-number-ii) | [易混淆数 II](/solution/1000-1099/1088.Confusing%20Number%20II/README.md) | `数学`,`回溯` | 困难 | 🔒 | | [1089](https://leetcode-cn.com/problems/duplicate-zeros) | [复写零](/solution/1000-1099/1089.Duplicate%20Zeros/README.md) | `数组`,`双指针` | 简单 | | | [1090](https://leetcode-cn.com/problems/largest-values-from-labels) | [受标签影响的最大值](/solution/1000-1099/1090.Largest%20Values%20From%20Labels/README.md) | `贪心`,`数组`,`哈希表`,`计数`,`排序` | 中等 | | | [1091](https://leetcode-cn.com/problems/shortest-path-in-binary-matrix) | [二进制矩阵中的最短路径](/solution/1000-1099/1091.Shortest%20Path%20in%20Binary%20Matrix/README.md) | `广度优先搜索`,`数组`,`矩阵` | 中等 | | | [1092](https://leetcode-cn.com/problems/shortest-common-supersequence) | [最短公共超序列](/solution/1000-1099/1092.Shortest%20Common%20Supersequence/README.md) | `字符串`,`动态规划` | 困难 | | | [1093](https://leetcode-cn.com/problems/statistics-from-a-large-sample) | [大样本统计](/solution/1000-1099/1093.Statistics%20from%20a%20Large%20Sample/README.md) | `数学`,`双指针`,`概率与统计` | 中等 | | | [1094](https://leetcode-cn.com/problems/car-pooling) | [拼车](/solution/1000-1099/1094.Car%20Pooling/README.md) | `数组`,`前缀和`,`排序`,`模拟`,`堆（优先队列）` | 中等 | | | [1095](https://leetcode-cn.com/problems/find-in-mountain-array) | [山脉数组中查找目标值](/solution/1000-1099/1095.Find%20in%20Mountain%20Array/README.md) | `数组`,`二分查找`,`交互` | 困难 | | | [1096](https://leetcode-cn.com/problems/brace-expansion-ii) | [花括号展开 II](/solution/1000-1099/1096.Brace%20Expansion%20II/README.md) | `栈`,`广度优先搜索`,`字符串`,`回溯` | 困难 | | | [1097](https://leetcode-cn.com/problems/game-play-analysis-v) | [游戏玩法分析 V](/solution/1000-1099/1097.Game%20Play%20Analysis%20V/README.md) | `数据库` | 困难 | 🔒 | | [1098](https://leetcode-cn.com/problems/unpopular-books) | [小众书籍](/solution/1000-1099/1098.Unpopular%20Books/README.md) | `数据库` | 中等 | 🔒 | | [1099](https://leetcode-cn.com/problems/two-sum-less-than-k) | [小于 K 的两数之和](/solution/1000-1099/1099.Two%20Sum%20Less%20Than%20K/README.md) | `数组`,`双指针`,`二分查找`,`排序` | 简单 | 🔒 | | [1100](https://leetcode-cn.com/problems/find-k-length-substrings-with-no-repeated-characters) | [长度为 K 的无重复字符子串](/solution/1100-1199/1100.Find%20K-Length%20Substrings%20With%20No%20Repeated%20Characters/README.md) | `哈希表`,`字符串`,`滑动窗口` | 中等 | 🔒 | | [1101](https://leetcode-cn.com/problems/the-earliest-moment-when-everyone-become-friends) | [彼此熟识的最早时间](/solution/1100-1199/1101.The%20Earliest%20Moment%20When%20Everyone%20Become%20Friends/README.md) | `并查集`,`数组` | 中等 | 🔒 | | [1102](https://leetcode-cn.com/problems/path-with-maximum-minimum-value) | [得分最高的路径](/solution/1100-1199/1102.Path%20With%20Maximum%20Minimum%20Value/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`数组`,`矩阵`,`堆（优先队列）` | 中等 | 🔒 | | [1103](https://leetcode-cn.com/problems/distribute-candies-to-people) | [分糖果 II](/solution/1100-1199/1103.Distribute%20Candies%20to%20People/README.md) | `数学`,`模拟` | 简单 | | | [1104](https://leetcode-cn.com/problems/path-in-zigzag-labelled-binary-tree) | [二叉树寻路](/solution/1100-1199/1104.Path%20In%20Zigzag%20Labelled%20Binary%20Tree/README.md) | `树`,`数学`,`二叉树` | 中等 | | | [1105](https://leetcode-cn.com/problems/filling-bookcase-shelves) | [填充书架](/solution/1100-1199/1105.Filling%20Bookcase%20Shelves/README.md) | `数组`,`动态规划` | 中等 | | | [1106](https://leetcode-cn.com/problems/parsing-a-boolean-expression) | [解析布尔表达式](/solution/1100-1199/1106.Parsing%20A%20Boolean%20Expression/README.md) | `栈`,`递归`,`字符串` | 困难 | | | [1107](https://leetcode-cn.com/problems/new-users-daily-count) | [每日新用户统计](/solution/1100-1199/1107.New%20Users%20Daily%20Count/README.md) | `数据库` | 中等 | 🔒 | | [1108](https://leetcode-cn.com/problems/defanging-an-ip-address) | [IP 地址无效化](/solution/1100-1199/1108.Defanging%20an%20IP%20Address/README.md) | `字符串` | 简单 | | | [1109](https://leetcode-cn.com/problems/corporate-flight-bookings) | [航班预订统计](/solution/1100-1199/1109.Corporate%20Flight%20Bookings/README.md) | `数组`,`前缀和` | 中等 | | | [1110](https://leetcode-cn.com/problems/delete-nodes-and-return-forest) | [删点成林](/solution/1100-1199/1110.Delete%20Nodes%20And%20Return%20Forest/README.md) | `树`,`深度优先搜索`,`二叉树` | 中等 | | | [1111](https://leetcode-cn.com/problems/maximum-nesting-depth-of-two-valid-parentheses-strings) | [有效括号的嵌套深度](/solution/1100-1199/1111.Maximum%20Nesting%20Depth%20of%20Two%20Valid%20Parentheses%20Strings/README.md) | `栈`,`字符串` | 中等 | | | [1112](https://leetcode-cn.com/problems/highest-grade-for-each-student) | [每位学生的最高成绩](/solution/1100-1199/1112.Highest%20Grade%20For%20Each%20Student/README.md) | `数据库` | 中等 | 🔒 | | [1113](https://leetcode-cn.com/problems/reported-posts) | [报告的记录](/solution/1100-1199/1113.Reported%20Posts/README.md) | `数据库` | 简单 | 🔒 | | [1114](https://leetcode-cn.com/problems/print-in-order) | [按序打印](/solution/1100-1199/1114.Print%20in%20Order/README.md) | `多线程` | 简单 | | | [1115](https://leetcode-cn.com/problems/print-foobar-alternately) | [交替打印 FooBar](/solution/1100-1199/1115.Print%20FooBar%20Alternately/README.md) | `多线程` | 中等 | | | [1116](https://leetcode-cn.com/problems/print-zero-even-odd) | [打印零与奇偶数](/solution/1100-1199/1116.Print%20Zero%20Even%20Odd/README.md) | `多线程` | 中等 | | | [1117](https://leetcode-cn.com/problems/building-h2o) | [H2O 生成](/solution/1100-1199/1117.Building%20H2O/README.md) | `多线程` | 中等 | | | [1118](https://leetcode-cn.com/problems/number-of-days-in-a-month) | [一月有多少天](/solution/1100-1199/1118.Number%20of%20Days%20in%20a%20Month/README.md) | `数学` | 简单 | 🔒 | | [1119](https://leetcode-cn.com/problems/remove-vowels-from-a-string) | [删去字符串中的元音](/solution/1100-1199/1119.Remove%20Vowels%20from%20a%20String/README.md) | `字符串` | 简单 | 🔒 | | [1120](https://leetcode-cn.com/problems/maximum-average-subtree) | [子树的最大平均值](/solution/1100-1199/1120.Maximum%20Average%20Subtree/README.md) | `树`,`深度优先搜索`,`二叉树` | 中等 | 🔒 | | [1121](https://leetcode-cn.com/problems/divide-array-into-increasing-sequences) | [将数组分成几个递增序列](/solution/1100-1199/1121.Divide%20Array%20Into%20Increasing%20Sequences/README.md) | `贪心`,`数组` | 困难 | 🔒 | | [1122](https://leetcode-cn.com/problems/relative-sort-array) | [数组的相对排序](/solution/1100-1199/1122.Relative%20Sort%20Array/README.md) | `数组`,`哈希表`,`计数排序`,`排序` | 简单 | | | [1123](https://leetcode-cn.com/problems/lowest-common-ancestor-of-deepest-leaves) | [最深叶节点的最近公共祖先](/solution/1100-1199/1123.Lowest%20Common%20Ancestor%20of%20Deepest%20Leaves/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`哈希表`,`二叉树` | 中等 | | | [1124](https://leetcode-cn.com/problems/longest-well-performing-interval) | [表现良好的最长时间段](/solution/1100-1199/1124.Longest%20Well-Performing%20Interval/README.md) | `栈`,`数组`,`哈希表`,`前缀和`,`单调栈` | 中等 | | | [1125](https://leetcode-cn.com/problems/smallest-sufficient-team) | [最小的必要团队](/solution/1100-1199/1125.Smallest%20Sufficient%20Team/README.md) | `位运算`,`数组`,`动态规划`,`状态压缩` | 困难 | | | [1126](https://leetcode-cn.com/problems/active-businesses) | [查询活跃业务](/solution/1100-1199/1126.Active%20Businesses/README.md) | `数据库` | 中等 | 🔒 | | [1127](https://leetcode-cn.com/problems/user-purchase-platform) | [用户购买平台](/solution/1100-1199/1127.User%20Purchase%20Platform/README.md) | `数据库` | 困难 | 🔒 | | [1128](https://leetcode-cn.com/problems/number-of-equivalent-domino-pairs) | [等价多米诺骨牌对的数量](/solution/1100-1199/1128.Number%20of%20Equivalent%20Domino%20Pairs/README.md) | `数组`,`哈希表`,`计数` | 简单 | | | [1129](https://leetcode-cn.com/problems/shortest-path-with-alternating-colors) | [颜色交替的最短路径](/solution/1100-1199/1129.Shortest%20Path%20with%20Alternating%20Colors/README.md) | `广度优先搜索`,`图` | 中等 | | | [1130](https://leetcode-cn.com/problems/minimum-cost-tree-from-leaf-values) | [叶值的最小代价生成树](/solution/1100-1199/1130.Minimum%20Cost%20Tree%20From%20Leaf%20Values/README.md) | `栈`,`贪心`,`动态规划`,`单调栈` | 中等 | | | [1131](https://leetcode-cn.com/problems/maximum-of-absolute-value-expression) | [绝对值表达式的最大值](/solution/1100-1199/1131.Maximum%20of%20Absolute%20Value%20Expression/README.md) | `数组`,`数学` | 中等 | | | [1132](https://leetcode-cn.com/problems/reported-posts-ii) | [报告的记录 II](/solution/1100-1199/1132.Reported%20Posts%20II/README.md) | `数据库` | 中等 | 🔒 | | [1133](https://leetcode-cn.com/problems/largest-unique-number) | [最大唯一数](/solution/1100-1199/1133.Largest%20Unique%20Number/README.md) | `数组`,`哈希表`,`排序` | 简单 | 🔒 | | [1134](https://leetcode-cn.com/problems/armstrong-number) | [阿姆斯特朗数](/solution/1100-1199/1134.Armstrong%20Number/README.md) | `数学` | 简单 | 🔒 | | [1135](https://leetcode-cn.com/problems/connecting-cities-with-minimum-cost) | [最低成本联通所有城市](/solution/1100-1199/1135.Connecting%20Cities%20With%20Minimum%20Cost/README.md) | `并查集`,`图`,`最小生成树`,`堆（优先队列）` | 中等 | 🔒 | | [1136](https://leetcode-cn.com/problems/parallel-courses) | [平行课程](/solution/1100-1199/1136.Parallel%20Courses/README.md) | `图`,`拓扑排序` | 中等 | 🔒 | | [1137](https://leetcode-cn.com/problems/n-th-tribonacci-number) | [第 N 个泰波那契数](/solution/1100-1199/1137.N-th%20Tribonacci%20Number/README.md) | `记忆化搜索`,`数学`,`动态规划` | 简单 | | | [1138](https://leetcode-cn.com/problems/alphabet-board-path) | [字母板上的路径](/solution/1100-1199/1138.Alphabet%20Board%20Path/README.md) | `哈希表`,`字符串` | 中等 | | | [1139](https://leetcode-cn.com/problems/largest-1-bordered-square) | [最大的以 1 为边界的正方形](/solution/1100-1199/1139.Largest%201-Bordered%20Square/README.md) | `数组`,`动态规划`,`矩阵` | 中等 | | | [1140](https://leetcode-cn.com/problems/stone-game-ii) | [石子游戏 II](/solution/1100-1199/1140.Stone%20Game%20II/README.md) | `数组`,`数学`,`动态规划`,`博弈` | 中等 | | | [1141](https://leetcode-cn.com/problems/user-activity-for-the-past-30-days-i) | [查询近 30 天活跃用户数](/solution/1100-1199/1141.User%20Activity%20for%20the%20Past%2030%20Days%20I/README.md) | `数据库` | 简单 | | | [1142](https://leetcode-cn.com/problems/user-activity-for-the-past-30-days-ii) | [过去 30 天的用户活动 II](/solution/1100-1199/1142.User%20Activity%20for%20the%20Past%2030%20Days%20II/README.md) | `数据库` | 简单 | 🔒 | | [1143](https://leetcode-cn.com/problems/longest-common-subsequence) | [最长公共子序列](/solution/1100-1199/1143.Longest%20Common%20Subsequence/README.md) | `字符串`,`动态规划` | 中等 | | | [1144](https://leetcode-cn.com/problems/decrease-elements-to-make-array-zigzag) | [递减元素使数组呈锯齿状](/solution/1100-1199/1144.Decrease%20Elements%20To%20Make%20Array%20Zigzag/README.md) | `贪心`,`数组` | 中等 | | | [1145](https://leetcode-cn.com/problems/binary-tree-coloring-game) | [二叉树着色游戏](/solution/1100-1199/1145.Binary%20Tree%20Coloring%20Game/README.md) | `树`,`深度优先搜索`,`二叉树` | 中等 | | | [1146](https://leetcode-cn.com/problems/snapshot-array) | [快照数组](/solution/1100-1199/1146.Snapshot%20Array/README.md) | `设计`,`数组`,`哈希表`,`二分查找` | 中等 | | | [1147](https://leetcode-cn.com/problems/longest-chunked-palindrome-decomposition) | [段式回文](/solution/1100-1199/1147.Longest%20Chunked%20Palindrome%20Decomposition/README.md) | `贪心`,`双指针`,`字符串`,`动态规划`,`哈希函数`,`滚动哈希` | 困难 | | | [1148](https://leetcode-cn.com/problems/article-views-i) | [文章浏览 I](/solution/1100-1199/1148.Article%20Views%20I/README.md) | `数据库` | 简单 | | | [1149](https://leetcode-cn.com/problems/article-views-ii) | [文章浏览 II](/solution/1100-1199/1149.Article%20Views%20II/README.md) | `数据库` | 中等 | 🔒 | | [1150](https://leetcode-cn.com/problems/check-if-a-number-is-majority-element-in-a-sorted-array) | [检查一个数是否在数组中占绝大多数](/solution/1100-1199/1150.Check%20If%20a%20Number%20Is%20Majority%20Element%20in%20a%20Sorted%20Array/README.md) | `数组`,`二分查找` | 简单 | 🔒 | | [1151](https://leetcode-cn.com/problems/minimum-swaps-to-group-all-1s-together) | [最少交换次数来组合所有的 1](/solution/1100-1199/1151.Minimum%20Swaps%20to%20Group%20All%201%27s%20Together/README.md) | `数组`,`滑动窗口` | 中等 | 🔒 | | [1152](https://leetcode-cn.com/problems/analyze-user-website-visit-pattern) | [用户网站访问行为分析](/solution/1100-1199/1152.Analyze%20User%20Website%20Visit%20Pattern/README.md) | `数组`,`哈希表`,`排序` | 中等 | 🔒 | | [1153](https://leetcode-cn.com/problems/string-transforms-into-another-string) | [字符串转化](/solution/1100-1199/1153.String%20Transforms%20Into%20Another%20String/README.md) | `哈希表`,`字符串` | 困难 | 🔒 | | [1154](https://leetcode-cn.com/problems/day-of-the-year) | [一年中的第几天](/solution/1100-1199/1154.Day%20of%20the%20Year/README.md) | `数学`,`字符串` | 简单 | | | [1155](https://leetcode-cn.com/problems/number-of-dice-rolls-with-target-sum) | [掷骰子的 N 种方法](/solution/1100-1199/1155.Number%20of%20Dice%20Rolls%20With%20Target%20Sum/README.md) | `动态规划` | 中等 | | | [1156](https://leetcode-cn.com/problems/swap-for-longest-repeated-character-substring) | [单字符重复子串的最大长度](/solution/1100-1199/1156.Swap%20For%20Longest%20Repeated%20Character%20Substring/README.md) | `字符串`,`滑动窗口` | 中等 | | | [1157](https://leetcode-cn.com/problems/online-majority-element-in-subarray) | [子数组中占绝大多数的元素](/solution/1100-1199/1157.Online%20Majority%20Element%20In%20Subarray/README.md) | `设计`,`树状数组`,`线段树`,`数组`,`二分查找` | 困难 | | | [1158](https://leetcode-cn.com/problems/market-analysis-i) | [市场分析 I](/solution/1100-1199/1158.Market%20Analysis%20I/README.md) | `数据库` | 中等 | | | [1159](https://leetcode-cn.com/problems/market-analysis-ii) | [市场分析 II](/solution/1100-1199/1159.Market%20Analysis%20II/README.md) | `数据库` | 困难 | 🔒 | | [1160](https://leetcode-cn.com/problems/find-words-that-can-be-formed-by-characters) | [拼写单词](/solution/1100-1199/1160.Find%20Words%20That%20Can%20Be%20Formed%20by%20Characters/README.md) | `数组`,`哈希表`,`字符串` | 简单 | | | [1161](https://leetcode-cn.com/problems/maximum-level-sum-of-a-binary-tree) | [最大层内元素和](/solution/1100-1199/1161.Maximum%20Level%20Sum%20of%20a%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉树` | 中等 | | | [1162](https://leetcode-cn.com/problems/as-far-from-land-as-possible) | [地图分析](/solution/1100-1199/1162.As%20Far%20from%20Land%20as%20Possible/README.md) | `广度优先搜索`,`数组`,`动态规划`,`矩阵` | 中等 | | | [1163](https://leetcode-cn.com/problems/last-substring-in-lexicographical-order) | [按字典序排在最后的子串](/solution/1100-1199/1163.Last%20Substring%20in%20Lexicographical%20Order/README.md) | `双指针`,`字符串` | 困难 | | | [1164](https://leetcode-cn.com/problems/product-price-at-a-given-date) | [指定日期的产品价格](/solution/1100-1199/1164.Product%20Price%20at%20a%20Given%20Date/README.md) | `数据库` | 中等 | 🔒 | | [1165](https://leetcode-cn.com/problems/single-row-keyboard) | [单行键盘](/solution/1100-1199/1165.Single-Row%20Keyboard/README.md) | `哈希表`,`字符串` | 简单 | 🔒 | | [1166](https://leetcode-cn.com/problems/design-file-system) | [设计文件系统](/solution/1100-1199/1166.Design%20File%20System/README.md) | `设计`,`字典树`,`哈希表`,`字符串` | 中等 | 🔒 | | [1167](https://leetcode-cn.com/problems/minimum-cost-to-connect-sticks) | [连接棒材的最低费用](/solution/1100-1199/1167.Minimum%20Cost%20to%20Connect%20Sticks/README.md) | `贪心`,`数组`,`堆（优先队列）` | 中等 | 🔒 | | [1168](https://leetcode-cn.com/problems/optimize-water-distribution-in-a-village) | [水资源分配优化](/solution/1100-1199/1168.Optimize%20Water%20Distribution%20in%20a%20Village/README.md) | `并查集`,`图`,`最小生成树` | 困难 | 🔒 | | [1169](https://leetcode-cn.com/problems/invalid-transactions) | [查询无效交易](/solution/1100-1199/1169.Invalid%20Transactions/README.md) | `数组`,`哈希表`,`字符串`,`排序` | 中等 | | | [1170](https://leetcode-cn.com/problems/compare-strings-by-frequency-of-the-smallest-character) | [比较字符串最小字母出现频次](/solution/1100-1199/1170.Compare%20Strings%20by%20Frequency%20of%20the%20Smallest%20Character/README.md) | `数组`,`哈希表`,`字符串`,`二分查找`,`排序` | 中等 | | | [1171](https://leetcode-cn.com/problems/remove-zero-sum-consecutive-nodes-from-linked-list) | [从链表中删去总和值为零的连续节点](/solution/1100-1199/1171.Remove%20Zero%20Sum%20Consecutive%20Nodes%20from%20Linked%20List/README.md) | `哈希表`,`链表` | 中等 | | | [1172](https://leetcode-cn.com/problems/dinner-plate-stacks) | [餐盘栈](/solution/1100-1199/1172.Dinner%20Plate%20Stacks/README.md) | `栈`,`设计`,`哈希表`,`堆（优先队列）` | 困难 | | | [1173](https://leetcode-cn.com/problems/immediate-food-delivery-i) | [即时食物配送 I](/solution/1100-1199/1173.Immediate%20Food%20Delivery%20I/README.md) | `数据库` | 简单 | 🔒 | | [1174](https://leetcode-cn.com/problems/immediate-food-delivery-ii) | [即时食物配送 II](/solution/1100-1199/1174.Immediate%20Food%20Delivery%20II/README.md) | `数据库` | 中等 | 🔒 | | [1175](https://leetcode-cn.com/problems/prime-arrangements) | [质数排列](/solution/1100-1199/1175.Prime%20Arrangements/README.md) | `数学` | 简单 | | | [1176](https://leetcode-cn.com/problems/diet-plan-performance) | [健身计划评估](/solution/1100-1199/1176.Diet%20Plan%20Performance/README.md) | `数组`,`滑动窗口` | 简单 | 🔒 | | [1177](https://leetcode-cn.com/problems/can-make-palindrome-from-substring) | [构建回文串检测](/solution/1100-1199/1177.Can%20Make%20Palindrome%20from%20Substring/README.md) | `位运算`,`哈希表`,`字符串`,`前缀和` | 中等 | | | [1178](https://leetcode-cn.com/problems/number-of-valid-words-for-each-puzzle) | [猜字谜](/solution/1100-1199/1178.Number%20of%20Valid%20Words%20for%20Each%20Puzzle/README.md) | `位运算`,`字典树`,`数组`,`哈希表`,`字符串` | 困难 | | | [1179](https://leetcode-cn.com/problems/reformat-department-table) | [重新格式化部门表](/solution/1100-1199/1179.Reformat%20Department%20Table/README.md) | `数据库` | 简单 | | | [1180](https://leetcode-cn.com/problems/count-substrings-with-only-one-distinct-letter) | [统计只含单一字母的子串](/solution/1100-1199/1180.Count%20Substrings%20with%20Only%20One%20Distinct%20Letter/README.md) | `数学`,`字符串` | 简单 | 🔒 | | [1181](https://leetcode-cn.com/problems/before-and-after-puzzle) | [前后拼接](/solution/1100-1199/1181.Before%20and%20After%20Puzzle/README.md) | `数组`,`哈希表`,`字符串`,`排序` | 中等 | 🔒 | | [1182](https://leetcode-cn.com/problems/shortest-distance-to-target-color) | [与目标颜色间的最短距离](/solution/1100-1199/1182.Shortest%20Distance%20to%20Target%20Color/README.md) | `数组`,`二分查找`,`动态规划` | 中等 | 🔒 | | [1183](https://leetcode-cn.com/problems/maximum-number-of-ones) | [矩阵中 1 的最大数量](/solution/1100-1199/1183.Maximum%20Number%20of%20Ones/README.md) | `贪心`,`堆（优先队列）` | 困难 | 🔒 | | [1184](https://leetcode-cn.com/problems/distance-between-bus-stops) | [公交站间的距离](/solution/1100-1199/1184.Distance%20Between%20Bus%20Stops/README.md) | `数组` | 简单 | | | [1185](https://leetcode-cn.com/problems/day-of-the-week) | [一周中的第几天](/solution/1100-1199/1185.Day%20of%20the%20Week/README.md) | `数学` | 简单 | | | [1186](https://leetcode-cn.com/problems/maximum-subarray-sum-with-one-deletion) | [删除一次得到子数组最大和](/solution/1100-1199/1186.Maximum%20Subarray%20Sum%20with%20One%20Deletion/README.md) | `数组`,`动态规划` | 中等 | | | [1187](https://leetcode-cn.com/problems/make-array-strictly-increasing) | [使数组严格递增](/solution/1100-1199/1187.Make%20Array%20Strictly%20Increasing/README.md) | `数组`,`二分查找`,`动态规划` | 困难 | | | [1188](https://leetcode-cn.com/problems/design-bounded-blocking-queue) | [设计有限阻塞队列](/solution/1100-1199/1188.Design%20Bounded%20Blocking%20Queue/README.md) | `多线程` | 中等 | 🔒 | | [1189](https://leetcode-cn.com/problems/maximum-number-of-balloons) | [“气球” 的最大数量](/solution/1100-1199/1189.Maximum%20Number%20of%20Balloons/README.md) | `哈希表`,`字符串`,`计数` | 简单 | | | [1190](https://leetcode-cn.com/problems/reverse-substrings-between-each-pair-of-parentheses) | [反转每对括号间的子串](/solution/1100-1199/1190.Reverse%20Substrings%20Between%20Each%20Pair%20of%20Parentheses/README.md) | `栈`,`字符串` | 中等 | | | [1191](https://leetcode-cn.com/problems/k-concatenation-maximum-sum) | [K 次串联后最大子数组之和](/solution/1100-1199/1191.K-Concatenation%20Maximum%20Sum/README.md) | `数组`,`动态规划` | 中等 | | | [1192](https://leetcode-cn.com/problems/critical-connections-in-a-network) | [查找集群内的「关键连接」](/solution/1100-1199/1192.Critical%20Connections%20in%20a%20Network/README.md) | `深度优先搜索`,`图`,`双连通分量` | 困难 | | | [1193](https://leetcode-cn.com/problems/monthly-transactions-i) | [每月交易 I](/solution/1100-1199/1193.Monthly%20Transactions%20I/README.md) | `数据库` | 中等 | 🔒 | | [1194](https://leetcode-cn.com/problems/tournament-winners) | [锦标赛优胜者](/solution/1100-1199/1194.Tournament%20Winners/README.md) | `数据库` | 困难 | 🔒 | | [1195](https://leetcode-cn.com/problems/fizz-buzz-multithreaded) | [交替打印字符串](/solution/1100-1199/1195.Fizz%20Buzz%20Multithreaded/README.md) | `多线程` | 中等 | | | [1196](https://leetcode-cn.com/problems/how-many-apples-can-you-put-into-the-basket) | [最多可以买到的苹果数量](/solution/1100-1199/1196.How%20Many%20Apples%20Can%20You%20Put%20into%20the%20Basket/README.md) | `贪心`,`数组`,`排序` | 简单 | 🔒 | | [1197](https://leetcode-cn.com/problems/minimum-knight-moves) | [进击的骑士](/solution/1100-1199/1197.Minimum%20Knight%20Moves/README.md) | `广度优先搜索` | 中等 | 🔒 | | [1198](https://leetcode-cn.com/problems/find-smallest-common-element-in-all-rows) | [找出所有行中最小公共元素](/solution/1100-1199/1198.Find%20Smallest%20Common%20Element%20in%20All%20Rows/README.md) | `数组`,`哈希表`,`二分查找`,`计数`,`矩阵` | 中等 | 🔒 | | [1199](https://leetcode-cn.com/problems/minimum-time-to-build-blocks) | [建造街区的最短时间](/solution/1100-1199/1199.Minimum%20Time%20to%20Build%20Blocks/README.md) | `贪心`,`数学`,`堆（优先队列）` | 困难 | 🔒 | | [1200](https://leetcode-cn.com/problems/minimum-absolute-difference) | [最小绝对差](/solution/1200-1299/1200.Minimum%20Absolute%20Difference/README.md) | `数组`,`排序` | 简单 | | | [1201](https://leetcode-cn.com/problems/ugly-number-iii) | [丑数 III](/solution/1200-1299/1201.Ugly%20Number%20III/README.md) | `数学`,`二分查找`,`数论` | 中等 | | | [1202](https://leetcode-cn.com/problems/smallest-string-with-swaps) | [交换字符串中的元素](/solution/1200-1299/1202.Smallest%20String%20With%20Swaps/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`哈希表`,`字符串` | 中等 | | | [1203](https://leetcode-cn.com/problems/sort-items-by-groups-respecting-dependencies) | [项目管理](/solution/1200-1299/1203.Sort%20Items%20by%20Groups%20Respecting%20Dependencies/README.md) | `深度优先搜索`,`广度优先搜索`,`图`,`拓扑排序` | 困难 | | | [1204](https://leetcode-cn.com/problems/last-person-to-fit-in-the-bus) | [最后一个能进入电梯的人](/solution/1200-1299/1204.Last%20Person%20to%20Fit%20in%20the%20Bus/README.md) | `数据库` | 中等 | 🔒 | | [1205](https://leetcode-cn.com/problems/monthly-transactions-ii) | [每月交易 II](/solution/1200-1299/1205.Monthly%20Transactions%20II/README.md) | `数据库` | 中等 | 🔒 | | [1206](https://leetcode-cn.com/problems/design-skiplist) | [设计跳表](/solution/1200-1299/1206.Design%20Skiplist/README.md) | `设计`,`链表` | 困难 | | | [1207](https://leetcode-cn.com/problems/unique-number-of-occurrences) | [独一无二的出现次数](/solution/1200-1299/1207.Unique%20Number%20of%20Occurrences/README.md) | `数组`,`哈希表` | 简单 | | | [1208](https://leetcode-cn.com/problems/get-equal-substrings-within-budget) | [尽可能使字符串相等](/solution/1200-1299/1208.Get%20Equal%20Substrings%20Within%20Budget/README.md) | `字符串`,`二分查找`,`前缀和`,`滑动窗口` | 中等 | | | [1209](https://leetcode-cn.com/problems/remove-all-adjacent-duplicates-in-string-ii) | [删除字符串中的所有相邻重复项 II](/solution/1200-1299/1209.Remove%20All%20Adjacent%20Duplicates%20in%20String%20II/README.md) | `栈`,`字符串` | 中等 | | | [1210](https://leetcode-cn.com/problems/minimum-moves-to-reach-target-with-rotations) | [穿过迷宫的最少移动次数](/solution/1200-1299/1210.Minimum%20Moves%20to%20Reach%20Target%20with%20Rotations/README.md) | `广度优先搜索`,`数组`,`矩阵` | 困难 | | | [1211](https://leetcode-cn.com/problems/queries-quality-and-percentage) | [查询结果的质量和占比](/solution/1200-1299/1211.Queries%20Quality%20and%20Percentage/README.md) | `数据库` | 简单 | 🔒 | | [1212](https://leetcode-cn.com/problems/team-scores-in-football-tournament) | [查询球队积分](/solution/1200-1299/1212.Team%20Scores%20in%20Football%20Tournament/README.md) | `数据库` | 中等 | 🔒 | | [1213](https://leetcode-cn.com/problems/intersection-of-three-sorted-arrays) | [三个有序数组的交集](/solution/1200-1299/1213.Intersection%20of%20Three%20Sorted%20Arrays/README.md) | `数组`,`哈希表`,`二分查找`,`计数` | 简单 | 🔒 | | [1214](https://leetcode-cn.com/problems/two-sum-bsts) | [查找两棵二叉搜索树之和](/solution/1200-1299/1214.Two%20Sum%20BSTs/README.md) | `栈`,`树`,`深度优先搜索`,`二叉搜索树`,`双指针`,`二分查找`,`二叉树` | 中等 | 🔒 | | [1215](https://leetcode-cn.com/problems/stepping-numbers) | [步进数](/solution/1200-1299/1215.Stepping%20Numbers/README.md) | `广度优先搜索`,`回溯` | 中等 | 🔒 | | [1216](https://leetcode-cn.com/problems/valid-palindrome-iii) | [验证回文字符串 III](/solution/1200-1299/1216.Valid%20Palindrome%20III/README.md) | `字符串`,`动态规划` | 困难 | 🔒 | | [1217](https://leetcode-cn.com/problems/minimum-cost-to-move-chips-to-the-same-position) | [玩筹码](/solution/1200-1299/1217.Minimum%20Cost%20to%20Move%20Chips%20to%20The%20Same%20Position/README.md) | `贪心`,`数组`,`数学` | 简单 | | | [1218](https://leetcode-cn.com/problems/longest-arithmetic-subsequence-of-given-difference) | [最长定差子序列](/solution/1200-1299/1218.Longest%20Arithmetic%20Subsequence%20of%20Given%20Difference/README.md) | `数组`,`哈希表`,`动态规划` | 中等 | | | [1219](https://leetcode-cn.com/problems/path-with-maximum-gold) | [黄金矿工](/solution/1200-1299/1219.Path%20with%20Maximum%20Gold/README.md) | `数组`,`回溯`,`矩阵` | 中等 | | | [1220](https://leetcode-cn.com/problems/count-vowels-permutation) | [统计元音字母序列的数目](/solution/1200-1299/1220.Count%20Vowels%20Permutation/README.md) | `动态规划` | 困难 | | | [1221](https://leetcode-cn.com/problems/split-a-string-in-balanced-strings) | [分割平衡字符串](/solution/1200-1299/1221.Split%20a%20String%20in%20Balanced%20Strings/README.md) | `贪心`,`字符串`,`计数` | 简单 | | | [1222](https://leetcode-cn.com/problems/queens-that-can-attack-the-king) | [可以攻击国王的皇后](/solution/1200-1299/1222.Queens%20That%20Can%20Attack%20the%20King/README.md) | `数组`,`矩阵`,`模拟` | 中等 | | | [1223](https://leetcode-cn.com/problems/dice-roll-simulation) | [掷骰子模拟](/solution/1200-1299/1223.Dice%20Roll%20Simulation/README.md) | `数组`,`动态规划` | 困难 | | | [1224](https://leetcode-cn.com/problems/maximum-equal-frequency) | [最大相等频率](/solution/1200-1299/1224.Maximum%20Equal%20Frequency/README.md) | `数组`,`哈希表` | 困难 | | | [1225](https://leetcode-cn.com/problems/report-contiguous-dates) | [报告系统状态的连续日期](/solution/1200-1299/1225.Report%20Contiguous%20Dates/README.md) | `数据库` | 困难 | 🔒 | | [1226](https://leetcode-cn.com/problems/the-dining-philosophers) | [哲学家进餐](/solution/1200-1299/1226.The%20Dining%20Philosophers/README.md) | `多线程` | 中等 | | | [1227](https://leetcode-cn.com/problems/airplane-seat-assignment-probability) | [飞机座位分配概率](/solution/1200-1299/1227.Airplane%20Seat%20Assignment%20Probability/README.md) | `脑筋急转弯`,`数学`,`动态规划`,`概率与统计` | 中等 | | | [1228](https://leetcode-cn.com/problems/missing-number-in-arithmetic-progression) | [等差数列中缺失的数字](/solution/1200-1299/1228.Missing%20Number%20In%20Arithmetic%20Progression/README.md) | `数组`,`数学` | 简单 | 🔒 | | [1229](https://leetcode-cn.com/problems/meeting-scheduler) | [安排会议日程](/solution/1200-1299/1229.Meeting%20Scheduler/README.md) | `数组`,`双指针`,`排序` | 中等 | 🔒 | | [1230](https://leetcode-cn.com/problems/toss-strange-coins) | [抛掷硬币](/solution/1200-1299/1230.Toss%20Strange%20Coins/README.md) | `数学`,`动态规划`,`概率与统计` | 中等 | 🔒 | | [1231](https://leetcode-cn.com/problems/divide-chocolate) | [分享巧克力](/solution/1200-1299/1231.Divide%20Chocolate/README.md) | `数组`,`二分查找` | 困难 | 🔒 | | [1232](https://leetcode-cn.com/problems/check-if-it-is-a-straight-line) | [缀点成线](/solution/1200-1299/1232.Check%20If%20It%20Is%20a%20Straight%20Line/README.md) | `几何`,`数组`,`数学` | 简单 | | | [1233](https://leetcode-cn.com/problems/remove-sub-folders-from-the-filesystem) | [删除子文件夹](/solution/1200-1299/1233.Remove%20Sub-Folders%20from%20the%20Filesystem/README.md) | `字典树`,`数组`,`字符串` | 中等 | | | [1234](https://leetcode-cn.com/problems/replace-the-substring-for-balanced-string) | [替换子串得到平衡字符串](/solution/1200-1299/1234.Replace%20the%20Substring%20for%20Balanced%20String/README.md) | `字符串`,`滑动窗口` | 中等 | | | [1235](https://leetcode-cn.com/problems/maximum-profit-in-job-scheduling) | [规划兼职工作](/solution/1200-1299/1235.Maximum%20Profit%20in%20Job%20Scheduling/README.md) | `数组`,`二分查找`,`动态规划`,`排序` | 困难 | | | [1236](https://leetcode-cn.com/problems/web-crawler) | [网络爬虫](/solution/1200-1299/1236.Web%20Crawler/README.md) | `深度优先搜索`,`广度优先搜索`,`字符串`,`交互` | 中等 | 🔒 | | [1237](https://leetcode-cn.com/problems/find-positive-integer-solution-for-a-given-equation) | [找出给定方程的正整数解](/solution/1200-1299/1237.Find%20Positive%20Integer%20Solution%20for%20a%20Given%20Equation/README.md) | `数学`,`双指针`,`二分查找`,`交互` | 中等 | | | [1238](https://leetcode-cn.com/problems/circular-permutation-in-binary-representation) | [循环码排列](/solution/1200-1299/1238.Circular%20Permutation%20in%20Binary%20Representation/README.md) | `位运算`,`数学`,`回溯` | 中等 | | | [1239](https://leetcode-cn.com/problems/maximum-length-of-a-concatenated-string-with-unique-characters) | [串联字符串的最大长度](/solution/1200-1299/1239.Maximum%20Length%20of%20a%20Concatenated%20String%20with%20Unique%20Characters/README.md) | `位运算`,`数组`,`字符串`,`回溯` | 中等 | | | [1240](https://leetcode-cn.com/problems/tiling-a-rectangle-with-the-fewest-squares) | [铺瓷砖](/solution/1200-1299/1240.Tiling%20a%20Rectangle%20with%20the%20Fewest%20Squares/README.md) | `动态规划`,`回溯` | 困难 | | | [1241](https://leetcode-cn.com/problems/number-of-comments-per-post) | [每个帖子的评论数](/solution/1200-1299/1241.Number%20of%20Comments%20per%20Post/README.md) | `数据库` | 简单 | 🔒 | | [1242](https://leetcode-cn.com/problems/web-crawler-multithreaded) | [多线程网页爬虫](/solution/1200-1299/1242.Web%20Crawler%20Multithreaded/README.md) | `深度优先搜索`,`广度优先搜索`,`多线程` | 中等 | 🔒 | | [1243](https://leetcode-cn.com/problems/array-transformation) | [数组变换](/solution/1200-1299/1243.Array%20Transformation/README.md) | `数组`,`模拟` | 简单 | 🔒 | | [1244](https://leetcode-cn.com/problems/design-a-leaderboard) | [力扣排行榜](/solution/1200-1299/1244.Design%20A%20Leaderboard/README.md) | `设计`,`哈希表`,`排序` | 中等 | 🔒 | | [1245](https://leetcode-cn.com/problems/tree-diameter) | [树的直径](/solution/1200-1299/1245.Tree%20Diameter/README.md) | `树`,`深度优先搜索`,`广度优先搜索` | 中等 | 🔒 | | [1246](https://leetcode-cn.com/problems/palindrome-removal) | [删除回文子数组](/solution/1200-1299/1246.Palindrome%20Removal/README.md) | `数组`,`动态规划` | 困难 | 🔒 | | [1247](https://leetcode-cn.com/problems/minimum-swaps-to-make-strings-equal) | [交换字符使得字符串相同](/solution/1200-1299/1247.Minimum%20Swaps%20to%20Make%20Strings%20Equal/README.md) | `贪心`,`数学`,`字符串` | 中等 | | | [1248](https://leetcode-cn.com/problems/count-number-of-nice-subarrays) | [统计「优美子数组」](/solution/1200-1299/1248.Count%20Number%20of%20Nice%20Subarrays/README.md) | `数组`,`哈希表`,`数学`,`滑动窗口` | 中等 | | | [1249](https://leetcode-cn.com/problems/minimum-remove-to-make-valid-parentheses) | [移除无效的括号](/solution/1200-1299/1249.Minimum%20Remove%20to%20Make%20Valid%20Parentheses/README.md) | `栈`,`字符串` | 中等 | | | [1250](https://leetcode-cn.com/problems/check-if-it-is-a-good-array) | [检查「好数组」](/solution/1200-1299/1250.Check%20If%20It%20Is%20a%20Good%20Array/README.md) | `数组`,`数学`,`数论` | 困难 | | | [1251](https://leetcode-cn.com/problems/average-selling-price) | [平均售价](/solution/1200-1299/1251.Average%20Selling%20Price/README.md) | `数据库` | 简单 | 🔒 | | [1252](https://leetcode-cn.com/problems/cells-with-odd-values-in-a-matrix) | [奇数值单元格的数目](/solution/1200-1299/1252.Cells%20with%20Odd%20Values%20in%20a%20Matrix/README.md) | `数组`,`数学`,`模拟` | 简单 | | | [1253](https://leetcode-cn.com/problems/reconstruct-a-2-row-binary-matrix) | [重构 2 行二进制矩阵](/solution/1200-1299/1253.Reconstruct%20a%202-Row%20Binary%20Matrix/README.md) | `贪心`,`数组`,`矩阵` | 中等 | | | [1254](https://leetcode-cn.com/problems/number-of-closed-islands) | [统计封闭岛屿的数目](/solution/1200-1299/1254.Number%20of%20Closed%20Islands/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`数组`,`矩阵` | 中等 | | | [1255](https://leetcode-cn.com/problems/maximum-score-words-formed-by-letters) | [得分最高的单词集合](/solution/1200-1299/1255.Maximum%20Score%20Words%20Formed%20by%20Letters/README.md) | `位运算`,`数组`,`字符串`,`动态规划`,`回溯`,`状态压缩` | 困难 | | | [1256](https://leetcode-cn.com/problems/encode-number) | [加密数字](/solution/1200-1299/1256.Encode%20Number/README.md) | `位运算`,`数学`,`字符串` | 中等 | 🔒 | | [1257](https://leetcode-cn.com/problems/smallest-common-region) | [最小公共区域](/solution/1200-1299/1257.Smallest%20Common%20Region/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`数组`,`哈希表`,`字符串` | 中等 | 🔒 | | [1258](https://leetcode-cn.com/problems/synonymous-sentences) | [近义词句子](/solution/1200-1299/1258.Synonymous%20Sentences/README.md) | `并查集`,`数组`,`哈希表`,`字符串`,`回溯` | 中等 | 🔒 | | [1259](https://leetcode-cn.com/problems/handshakes-that-dont-cross) | [不相交的握手](/solution/1200-1299/1259.Handshakes%20That%20Don%27t%20Cross/README.md) | `数学`,`动态规划` | 困难 | 🔒 | | [1260](https://leetcode-cn.com/problems/shift-2d-grid) | [二维网格迁移](/solution/1200-1299/1260.Shift%202D%20Grid/README.md) | `数组`,`矩阵`,`模拟` | 简单 | | | [1261](https://leetcode-cn.com/problems/find-elements-in-a-contaminated-binary-tree) | [在受污染的二叉树中查找元素](/solution/1200-1299/1261.Find%20Elements%20in%20a%20Contaminated%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`设计`,`哈希表`,`二叉树` | 中等 | | | [1262](https://leetcode-cn.com/problems/greatest-sum-divisible-by-three) | [可被三整除的最大和](/solution/1200-1299/1262.Greatest%20Sum%20Divisible%20by%20Three/README.md) | `贪心`,`数组`,`动态规划` | 中等 | | | [1263](https://leetcode-cn.com/problems/minimum-moves-to-move-a-box-to-their-target-location) | [推箱子](/solution/1200-1299/1263.Minimum%20Moves%20to%20Move%20a%20Box%20to%20Their%20Target%20Location/README.md) | `广度优先搜索`,`数组`,`矩阵`,`堆（优先队列）` | 困难 | | | [1264](https://leetcode-cn.com/problems/page-recommendations) | [页面推荐](/solution/1200-1299/1264.Page%20Recommendations/README.md) | `数据库` | 中等 | 🔒 | | [1265](https://leetcode-cn.com/problems/print-immutable-linked-list-in-reverse) | [逆序打印不可变链表](/solution/1200-1299/1265.Print%20Immutable%20Linked%20List%20in%20Reverse/README.md) | `栈`,`递归`,`链表`,`双指针` | 中等 | 🔒 | | [1266](https://leetcode-cn.com/problems/minimum-time-visiting-all-points) | [访问所有点的最小时间](/solution/1200-1299/1266.Minimum%20Time%20Visiting%20All%20Points/README.md) | `几何`,`数组`,`数学` | 简单 | | | [1267](https://leetcode-cn.com/problems/count-servers-that-communicate) | [统计参与通信的服务器](/solution/1200-1299/1267.Count%20Servers%20that%20Communicate/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`数组`,`计数`,`矩阵` | 中等 | | | [1268](https://leetcode-cn.com/problems/search-suggestions-system) | [搜索推荐系统](/solution/1200-1299/1268.Search%20Suggestions%20System/README.md) | `字典树`,`数组`,`字符串` | 中等 | | | [1269](https://leetcode-cn.com/problems/number-of-ways-to-stay-in-the-same-place-after-some-steps) | [停在原地的方案数](/solution/1200-1299/1269.Number%20of%20Ways%20to%20Stay%20in%20the%20Same%20Place%20After%20Some%20Steps/README.md) | `动态规划` | 困难 | | | [1270](https://leetcode-cn.com/problems/all-people-report-to-the-given-manager) | [向公司 CEO 汇报工作的所有人](/solution/1200-1299/1270.All%20People%20Report%20to%20the%20Given%20Manager/README.md) | `数据库` | 中等 | 🔒 | | [1271](https://leetcode-cn.com/problems/hexspeak) | [十六进制魔术数字](/solution/1200-1299/1271.Hexspeak/README.md) | `数学`,`字符串` | 简单 | 🔒 | | [1272](https://leetcode-cn.com/problems/remove-interval) | [删除区间](/solution/1200-1299/1272.Remove%20Interval/README.md) | `数组` | 中等 | 🔒 | | [1273](https://leetcode-cn.com/problems/delete-tree-nodes) | [删除树节点](/solution/1200-1299/1273.Delete%20Tree%20Nodes/README.md) | `树`,`深度优先搜索`,`广度优先搜索` | 中等 | 🔒 | | [1274](https://leetcode-cn.com/problems/number-of-ships-in-a-rectangle) | [矩形内船只的数目](/solution/1200-1299/1274.Number%20of%20Ships%20in%20a%20Rectangle/README.md) | `数组`,`分治`,`交互` | 困难 | 🔒 | | [1275](https://leetcode-cn.com/problems/find-winner-on-a-tic-tac-toe-game) | [找出井字棋的获胜者](/solution/1200-1299/1275.Find%20Winner%20on%20a%20Tic%20Tac%20Toe%20Game/README.md) | `数组`,`哈希表`,`矩阵`,`模拟` | 简单 | | | [1276](https://leetcode-cn.com/problems/number-of-burgers-with-no-waste-of-ingredients) | [不浪费原料的汉堡制作方案](/solution/1200-1299/1276.Number%20of%20Burgers%20with%20No%20Waste%20of%20Ingredients/README.md) | `数学` | 中等 | | | [1277](https://leetcode-cn.com/problems/count-square-submatrices-with-all-ones) | [统计全为 1 的正方形子矩阵](/solution/1200-1299/1277.Count%20Square%20Submatrices%20with%20All%20Ones/README.md) | `数组`,`动态规划`,`矩阵` | 中等 | | | [1278](https://leetcode-cn.com/problems/palindrome-partitioning-iii) | [分割回文串 III](/solution/1200-1299/1278.Palindrome%20Partitioning%20III/README.md) | `字符串`,`动态规划` | 困难 | | | [1279](https://leetcode-cn.com/problems/traffic-light-controlled-intersection) | [红绿灯路口](/solution/1200-1299/1279.Traffic%20Light%20Controlled%20Intersection/README.md) | `多线程` | 简单 | 🔒 | | [1280](https://leetcode-cn.com/problems/students-and-examinations) | [学生们参加各科测试的次数](/solution/1200-1299/1280.Students%20and%20Examinations/README.md) | `数据库` | 简单 | 🔒 | | [1281](https://leetcode-cn.com/problems/subtract-the-product-and-sum-of-digits-of-an-integer) | [整数的各位积和之差](/solution/1200-1299/1281.Subtract%20the%20Product%20and%20Sum%20of%20Digits%20of%20an%20Integer/README.md) | `数学` | 简单 | | | [1282](https://leetcode-cn.com/problems/group-the-people-given-the-group-size-they-belong-to) | [用户分组](/solution/1200-1299/1282.Group%20the%20People%20Given%20the%20Group%20Size%20They%20Belong%20To/README.md) | `数组`,`哈希表` | 中等 | | | [1283](https://leetcode-cn.com/problems/find-the-smallest-divisor-given-a-threshold) | [使结果不超过阈值的最小除数](/solution/1200-1299/1283.Find%20the%20Smallest%20Divisor%20Given%20a%20Threshold/README.md) | `数组`,`二分查找` | 中等 | | | [1284](https://leetcode-cn.com/problems/minimum-number-of-flips-to-convert-binary-matrix-to-zero-matrix) | [转化为全零矩阵的最少反转次数](/solution/1200-1299/1284.Minimum%20Number%20of%20Flips%20to%20Convert%20Binary%20Matrix%20to%20Zero%20Matrix/README.md) | `位运算`,`广度优先搜索`,`数组`,`矩阵` | 困难 | | | [1285](https://leetcode-cn.com/problems/find-the-start-and-end-number-of-continuous-ranges) | [找到连续区间的开始和结束数字](/solution/1200-1299/1285.Find%20the%20Start%20and%20End%20Number%20of%20Continuous%20Ranges/README.md) | `数据库` | 中等 | 🔒 | | [1286](https://leetcode-cn.com/problems/iterator-for-combination) | [字母组合迭代器](/solution/1200-1299/1286.Iterator%20for%20Combination/README.md) | `设计`,`字符串`,`回溯`,`迭代器` | 中等 | | | [1287](https://leetcode-cn.com/problems/element-appearing-more-than-25-in-sorted-array) | [有序数组中出现次数超过 25%的元素](/solution/1200-1299/1287.Element%20Appearing%20More%20Than%2025%25%20In%20Sorted%20Array/README.md) | `数组` | 简单 | | | [1289](https://leetcode-cn.com/problems/minimum-falling-path-sum-ii) | [下降路径最小和 II](/solution/1200-1299/1289.Minimum%20Falling%20Path%20Sum%20II/README.md) | `数组`,`动态规划`,`矩阵` | 困难 | | | [1290](https://leetcode-cn.com/problems/convert-binary-number-in-a-linked-list-to-integer) | [二进制链表转整数](/solution/1200-1299/1290.Convert%20Binary%20Number%20in%20a%20Linked%20List%20to%20Integer/README.md) | `链表`,`数学` | 简单 | | | [1291](https://leetcode-cn.com/problems/sequential-digits) | [顺次数](/solution/1200-1299/1291.Sequential%20Digits/README.md) | `枚举` | 中等 | | | [1292](https://leetcode-cn.com/problems/maximum-side-length-of-a-square-with-sum-less-than-or-equal-to-threshold) | [元素和小于等于阈值的正方形的最大边长](/solution/1200-1299/1292.Maximum%20Side%20Length%20of%20a%20Square%20with%20Sum%20Less%20than%20or%20Equal%20to%20Threshold/README.md) | `数组`,`二分查找`,`矩阵`,`前缀和` | 中等 | | | [1293](https://leetcode-cn.com/problems/shortest-path-in-a-grid-with-obstacles-elimination) | [网格中的最短路径](/solution/1200-1299/1293.Shortest%20Path%20in%20a%20Grid%20with%20Obstacles%20Elimination/README.md) | `广度优先搜索`,`数组`,`矩阵` | 困难 | | | [1294](https://leetcode-cn.com/problems/weather-type-in-each-country) | [不同国家的天气类型](/solution/1200-1299/1294.Weather%20Type%20in%20Each%20Country/README.md) | `数据库` | 简单 | 🔒 | | [1295](https://leetcode-cn.com/problems/find-numbers-with-even-number-of-digits) | [统计位数为偶数的数字](/solution/1200-1299/1295.Find%20Numbers%20with%20Even%20Number%20of%20Digits/README.md) | `数组` | 简单 | | | [1296](https://leetcode-cn.com/problems/divide-array-in-sets-of-k-consecutive-numbers) | [划分数组为连续数字的集合](/solution/1200-1299/1296.Divide%20Array%20in%20Sets%20of%20K%20Consecutive%20Numbers/README.md) | `贪心`,`数组`,`哈希表`,`排序` | 中等 | | | [1297](https://leetcode-cn.com/problems/maximum-number-of-occurrences-of-a-substring) | [子串的最大出现次数](/solution/1200-1299/1297.Maximum%20Number%20of%20Occurrences%20of%20a%20Substring/README.md) | `哈希表`,`字符串`,`滑动窗口` | 中等 | | | [1298](https://leetcode-cn.com/problems/maximum-candies-you-can-get-from-boxes) | [你能从盒子里获得的最大糖果数](/solution/1200-1299/1298.Maximum%20Candies%20You%20Can%20Get%20from%20Boxes/README.md) | `广度优先搜索`,`数组` | 困难 | | | [1300](https://leetcode-cn.com/problems/sum-of-mutated-array-closest-to-target) | [转变数组后最接近目标值的数组和](/solution/1300-1399/1300.Sum%20of%20Mutated%20Array%20Closest%20to%20Target/README.md) | `数组`,`二分查找`,`排序` | 中等 | | | [1301](https://leetcode-cn.com/problems/number-of-paths-with-max-score) | [最大得分的路径数目](/solution/1300-1399/1301.Number%20of%20Paths%20with%20Max%20Score/README.md) | `数组`,`动态规划`,`矩阵` | 困难 | | | [1302](https://leetcode-cn.com/problems/deepest-leaves-sum) | [层数最深叶子节点的和](/solution/1300-1399/1302.Deepest%20Leaves%20Sum/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉树` | 中等 | | | [1303](https://leetcode-cn.com/problems/find-the-team-size) | [求团队人数](/solution/1300-1399/1303.Find%20the%20Team%20Size/README.md) | `数据库` | 简单 | 🔒 | | [1304](https://leetcode-cn.com/problems/find-n-unique-integers-sum-up-to-zero) | [和为零的 N 个唯一整数](/solution/1300-1399/1304.Find%20N%20Unique%20Integers%20Sum%20up%20to%20Zero/README.md) | `数组`,`数学` | 简单 | | | [1305](https://leetcode-cn.com/problems/all-elements-in-two-binary-search-trees) | [两棵二叉搜索树中的所有元素](/solution/1300-1399/1305.All%20Elements%20in%20Two%20Binary%20Search%20Trees/README.md) | `树`,`深度优先搜索`,`二叉搜索树`,`二叉树`,`排序` | 中等 | | | [1306](https://leetcode-cn.com/problems/jump-game-iii) | [跳跃游戏 III](/solution/1300-1399/1306.Jump%20Game%20III/README.md) | `深度优先搜索`,`广度优先搜索`,`数组` | 中等 | | | [1307](https://leetcode-cn.com/problems/verbal-arithmetic-puzzle) | [口算难题](/solution/1300-1399/1307.Verbal%20Arithmetic%20Puzzle/README.md) | `数组`,`数学`,`字符串`,`回溯` | 困难 | | | [1308](https://leetcode-cn.com/problems/running-total-for-different-genders) | [不同性别每日分数总计](/solution/1300-1399/1308.Running%20Total%20for%20Different%20Genders/README.md) | `数据库` | 中等 | 🔒 | | [1309](https://leetcode-cn.com/problems/decrypt-string-from-alphabet-to-integer-mapping) | [解码字母到整数映射](/solution/1300-1399/1309.Decrypt%20String%20from%20Alphabet%20to%20Integer%20Mapping/README.md) | `字符串` | 简单 | | | [1310](https://leetcode-cn.com/problems/xor-queries-of-a-subarray) | [子数组异或查询](/solution/1300-1399/1310.XOR%20Queries%20of%20a%20Subarray/README.md) | `位运算`,`数组`,`前缀和` | 中等 | | | [1311](https://leetcode-cn.com/problems/get-watched-videos-by-your-friends) | [获取你好友已观看的视频](/solution/1300-1399/1311.Get%20Watched%20Videos%20by%20Your%20Friends/README.md) | `广度优先搜索`,`数组`,`哈希表`,`排序` | 中等 | | | [1312](https://leetcode-cn.com/problems/minimum-insertion-steps-to-make-a-string-palindrome) | [让字符串成为回文串的最少插入次数](/solution/1300-1399/1312.Minimum%20Insertion%20Steps%20to%20Make%20a%20String%20Palindrome/README.md) | `字符串`,`动态规划` | 困难 | | | [1313](https://leetcode-cn.com/problems/decompress-run-length-encoded-list) | [解压缩编码列表](/solution/1300-1399/1313.Decompress%20Run-Length%20Encoded%20List/README.md) | `数组` | 简单 | | | [1314](https://leetcode-cn.com/problems/matrix-block-sum) | [矩阵区域和](/solution/1300-1399/1314.Matrix%20Block%20Sum/README.md) | `数组`,`矩阵`,`前缀和` | 中等 | | | [1315](https://leetcode-cn.com/problems/sum-of-nodes-with-even-valued-grandparent) | [祖父节点值为偶数的节点和](/solution/1300-1399/1315.Sum%20of%20Nodes%20with%20Even-Valued%20Grandparent/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉树` | 中等 | | | [1316](https://leetcode-cn.com/problems/distinct-echo-substrings) | [不同的循环子字符串](/solution/1300-1399/1316.Distinct%20Echo%20Substrings/README.md) | `字典树`,`字符串`,`动态规划`,`滑动窗口`,`哈希函数`,`滚动哈希` | 困难 | | | [1317](https://leetcode-cn.com/problems/convert-integer-to-the-sum-of-two-no-zero-integers) | [将整数转换为两个无零整数的和](/solution/1300-1399/1317.Convert%20Integer%20to%20the%20Sum%20of%20Two%20No-Zero%20Integers/README.md) | `数学` | 简单 | | | [1318](https://leetcode-cn.com/problems/minimum-flips-to-make-a-or-b-equal-to-c) | [或运算的最小翻转次数](/solution/1300-1399/1318.Minimum%20Flips%20to%20Make%20a%20OR%20b%20Equal%20to%20c/README.md) | `位运算` | 中等 | | | [1319](https://leetcode-cn.com/problems/number-of-operations-to-make-network-connected) | [连通网络的操作次数](/solution/1300-1399/1319.Number%20of%20Operations%20to%20Make%20Network%20Connected/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`图` | 中等 | | | [1320](https://leetcode-cn.com/problems/minimum-distance-to-type-a-word-using-two-fingers) | [二指输入的的最小距离](/solution/1300-1399/1320.Minimum%20Distance%20to%20Type%20a%20Word%20Using%20Two%20Fingers/README.md) | `字符串`,`动态规划` | 困难 | | | [1321](https://leetcode-cn.com/problems/restaurant-growth) | [餐馆营业额变化增长](/solution/1300-1399/1321.Restaurant%20Growth/README.md) | `数据库` | 中等 | 🔒 | | [1322](https://leetcode-cn.com/problems/ads-performance) | [广告效果](/solution/1300-1399/1322.Ads%20Performance/README.md) | `数据库` | 简单 | 🔒 | | [1323](https://leetcode-cn.com/problems/maximum-69-number) | [6 和 9 组成的最大数字](/solution/1300-1399/1323.Maximum%2069%20Number/README.md) | `贪心`,`数学` | 简单 | | | [1324](https://leetcode-cn.com/problems/print-words-vertically) | [竖直打印单词](/solution/1300-1399/1324.Print%20Words%20Vertically/README.md) | `数组`,`字符串`,`模拟` | 中等 | | | [1325](https://leetcode-cn.com/problems/delete-leaves-with-a-given-value) | [删除给定值的叶子节点](/solution/1300-1399/1325.Delete%20Leaves%20With%20a%20Given%20Value/README.md) | `树`,`深度优先搜索`,`二叉树` | 中等 | | | [1326](https://leetcode-cn.com/problems/minimum-number-of-taps-to-open-to-water-a-garden) | [灌溉花园的最少水龙头数目](/solution/1300-1399/1326.Minimum%20Number%20of%20Taps%20to%20Open%20to%20Water%20a%20Garden/README.md) | `贪心`,`数组`,`动态规划` | 困难 | | | [1327](https://leetcode-cn.com/problems/list-the-products-ordered-in-a-period) | [列出指定时间段内所有的下单产品](/solution/1300-1399/1327.List%20the%20Products%20Ordered%20in%20a%20Period/README.md) | `数据库` | 简单 | 🔒 | | [1328](https://leetcode-cn.com/problems/break-a-palindrome) | [破坏回文串](/solution/1300-1399/1328.Break%20a%20Palindrome/README.md) | `贪心`,`字符串` | 中等 | | | [1329](https://leetcode-cn.com/problems/sort-the-matrix-diagonally) | [将矩阵按对角线排序](/solution/1300-1399/1329.Sort%20the%20Matrix%20Diagonally/README.md) | `数组`,`矩阵`,`排序` | 中等 | | | [1330](https://leetcode-cn.com/problems/reverse-subarray-to-maximize-array-value) | [翻转子数组得到最大的数组值](/solution/1300-1399/1330.Reverse%20Subarray%20To%20Maximize%20Array%20Value/README.md) | `贪心`,`数组`,`数学` | 困难 | | | [1331](https://leetcode-cn.com/problems/rank-transform-of-an-array) | [数组序号转换](/solution/1300-1399/1331.Rank%20Transform%20of%20an%20Array/README.md) | `数组`,`哈希表`,`排序` | 简单 | | | [1332](https://leetcode-cn.com/problems/remove-palindromic-subsequences) | [删除回文子序列](/solution/1300-1399/1332.Remove%20Palindromic%20Subsequences/README.md) | `双指针`,`字符串` | 简单 | | | [1333](https://leetcode-cn.com/problems/filter-restaurants-by-vegan-friendly-price-and-distance) | [餐厅过滤器](/solution/1300-1399/1333.Filter%20Restaurants%20by%20Vegan-Friendly%2C%20Price%20and%20Distance/README.md) | `数组`,`排序` | 中等 | | | [1334](https://leetcode-cn.com/problems/find-the-city-with-the-smallest-number-of-neighbors-at-a-threshold-distance) | [阈值距离内邻居最少的城市](/solution/1300-1399/1334.Find%20the%20City%20With%20the%20Smallest%20Number%20of%20Neighbors%20at%20a%20Threshold%20Distance/README.md) | `图`,`动态规划`,`最短路` | 中等 | | | [1335](https://leetcode-cn.com/problems/minimum-difficulty-of-a-job-schedule) | [工作计划的最低难度](/solution/1300-1399/1335.Minimum%20Difficulty%20of%20a%20Job%20Schedule/README.md) | `数组`,`动态规划` | 困难 | | | [1336](https://leetcode-cn.com/problems/number-of-transactions-per-visit) | [每次访问的交易次数](/solution/1300-1399/1336.Number%20of%20Transactions%20per%20Visit/README.md) | `数据库` | 困难 | 🔒 | | [1337](https://leetcode-cn.com/problems/the-k-weakest-rows-in-a-matrix) | [矩阵中战斗力最弱的 K 行](/solution/1300-1399/1337.The%20K%20Weakest%20Rows%20in%20a%20Matrix/README.md) | `数组`,`二分查找`,`矩阵`,`排序`,`堆（优先队列）` | 简单 | | | [1338](https://leetcode-cn.com/problems/reduce-array-size-to-the-half) | [数组大小减半](/solution/1300-1399/1338.Reduce%20Array%20Size%20to%20The%20Half/README.md) | `贪心`,`数组`,`哈希表`,`排序`,`堆（优先队列）` | 中等 | | | [1339](https://leetcode-cn.com/problems/maximum-product-of-splitted-binary-tree) | [分裂二叉树的最大乘积](/solution/1300-1399/1339.Maximum%20Product%20of%20Splitted%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`二叉树` | 中等 | | | [1340](https://leetcode-cn.com/problems/jump-game-v) | [跳跃游戏 V](/solution/1300-1399/1340.Jump%20Game%20V/README.md) | `数组`,`动态规划`,`排序` | 困难 | | | [1341](https://leetcode-cn.com/problems/movie-rating) | [电影评分](/solution/1300-1399/1341.Movie%20Rating/README.md) | `数据库` | 中等 | 🔒 | | [1342](https://leetcode-cn.com/problems/number-of-steps-to-reduce-a-number-to-zero) | [将数字变成 0 的操作次数](/solution/1300-1399/1342.Number%20of%20Steps%20to%20Reduce%20a%20Number%20to%20Zero/README.md) | `位运算`,`数学` | 简单 | | | [1343](https://leetcode-cn.com/problems/number-of-sub-arrays-of-size-k-and-average-greater-than-or-equal-to-threshold) | [大小为 K 且平均值大于等于阈值的子数组数目](/solution/1300-1399/1343.Number%20of%20Sub-arrays%20of%20Size%20K%20and%20Average%20Greater%20than%20or%20Equal%20to%20Threshold/README.md) | `数组`,`滑动窗口` | 中等 | | | [1344](https://leetcode-cn.com/problems/angle-between-hands-of-a-clock) | [时钟指针的夹角](/solution/1300-1399/1344.Angle%20Between%20Hands%20of%20a%20Clock/README.md) | `数学` | 中等 | | | [1345](https://leetcode-cn.com/problems/jump-game-iv) | [跳跃游戏 IV](/solution/1300-1399/1345.Jump%20Game%20IV/README.md) | `广度优先搜索`,`数组`,`哈希表` | 困难 | | | [1346](https://leetcode-cn.com/problems/check-if-n-and-its-double-exist) | [检查整数及其两倍数是否存在](/solution/1300-1399/1346.Check%20If%20N%20and%20Its%20Double%20Exist/README.md) | `数组`,`哈希表`,`双指针`,`二分查找`,`排序` | 简单 | | | [1347](https://leetcode-cn.com/problems/minimum-number-of-steps-to-make-two-strings-anagram) | [制造字母异位词的最小步骤数](/solution/1300-1399/1347.Minimum%20Number%20of%20Steps%20to%20Make%20Two%20Strings%20Anagram/README.md) | `哈希表`,`字符串`,`计数` | 中等 | | | [1348](https://leetcode-cn.com/problems/tweet-counts-per-frequency) | [推文计数](/solution/1300-1399/1348.Tweet%20Counts%20Per%20Frequency/README.md) | `设计`,`哈希表`,`二分查找`,`有序集合`,`排序` | 中等 | | | [1349](https://leetcode-cn.com/problems/maximum-students-taking-exam) | [参加考试的最大学生数](/solution/1300-1399/1349.Maximum%20Students%20Taking%20Exam/README.md) | `位运算`,`数组`,`动态规划`,`状态压缩`,`矩阵` | 困难 | | | [1350](https://leetcode-cn.com/problems/students-with-invalid-departments) | [院系无效的学生](/solution/1300-1399/1350.Students%20With%20Invalid%20Departments/README.md) | `数据库` | 简单 | 🔒 | | [1351](https://leetcode-cn.com/problems/count-negative-numbers-in-a-sorted-matrix) | [统计有序矩阵中的负数](/solution/1300-1399/1351.Count%20Negative%20Numbers%20in%20a%20Sorted%20Matrix/README.md) | `数组`,`二分查找`,`矩阵` | 简单 | | | [1352](https://leetcode-cn.com/problems/product-of-the-last-k-numbers) | [最后 K 个数的乘积](/solution/1300-1399/1352.Product%20of%20the%20Last%20K%20Numbers/README.md) | `设计`,`队列`,`数组`,`数学`,`数据流` | 中等 | | | [1353](https://leetcode-cn.com/problems/maximum-number-of-events-that-can-be-attended) | [最多可以参加的会议数目](/solution/1300-1399/1353.Maximum%20Number%20of%20Events%20That%20Can%20Be%20Attended/README.md) | `贪心`,`数组`,`堆（优先队列）` | 中等 | | | [1354](https://leetcode-cn.com/problems/construct-target-array-with-multiple-sums) | [多次求和构造目标数组](/solution/1300-1399/1354.Construct%20Target%20Array%20With%20Multiple%20Sums/README.md) | `数组`,`堆（优先队列）` | 困难 | | | [1355](https://leetcode-cn.com/problems/activity-participants) | [活动参与者](/solution/1300-1399/1355.Activity%20Participants/README.md) | `数据库` | 中等 | 🔒 | | [1356](https://leetcode-cn.com/problems/sort-integers-by-the-number-of-1-bits) | [根据数字二进制下 1 的数目排序](/solution/1300-1399/1356.Sort%20Integers%20by%20The%20Number%20of%201%20Bits/README.md) | `位运算`,`数组`,`计数`,`排序` | 简单 | | | [1357](https://leetcode-cn.com/problems/apply-discount-every-n-orders) | [每隔 n 个顾客打折](/solution/1300-1399/1357.Apply%20Discount%20Every%20n%20Orders/README.md) | `设计`,`数组`,`哈希表` | 中等 | | | [1358](https://leetcode-cn.com/problems/number-of-substrings-containing-all-three-characters) | [包含所有三种字符的子字符串数目](/solution/1300-1399/1358.Number%20of%20Substrings%20Containing%20All%20Three%20Characters/README.md) | `哈希表`,`字符串`,`滑动窗口` | 中等 | | | [1359](https://leetcode-cn.com/problems/count-all-valid-pickup-and-delivery-options) | [有效的快递序列数目](/solution/1300-1399/1359.Count%20All%20Valid%20Pickup%20and%20Delivery%20Options/README.md) | `数学`,`动态规划`,`组合数学` | 困难 | | | [1360](https://leetcode-cn.com/problems/number-of-days-between-two-dates) | [日期之间隔几天](/solution/1300-1399/1360.Number%20of%20Days%20Between%20Two%20Dates/README.md) | `数学`,`字符串` | 简单 | | | [1361](https://leetcode-cn.com/problems/validate-binary-tree-nodes) | [验证二叉树](/solution/1300-1399/1361.Validate%20Binary%20Tree%20Nodes/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`并查集`,`图`,`二叉树` | 中等 | | | [1362](https://leetcode-cn.com/problems/closest-divisors) | [最接近的因数](/solution/1300-1399/1362.Closest%20Divisors/README.md) | `数学` | 中等 | | | [1363](https://leetcode-cn.com/problems/largest-multiple-of-three) | [形成三的最大倍数](/solution/1300-1399/1363.Largest%20Multiple%20of%20Three/README.md) | `贪心`,`数组`,`动态规划` | 困难 | | | [1364](https://leetcode-cn.com/problems/number-of-trusted-contacts-of-a-customer) | [顾客的可信联系人数量](/solution/1300-1399/1364.Number%20of%20Trusted%20Contacts%20of%20a%20Customer/README.md) | `数据库` | 中等 | 🔒 | | [1365](https://leetcode-cn.com/problems/how-many-numbers-are-smaller-than-the-current-number) | [有多少小于当前数字的数字](/solution/1300-1399/1365.How%20Many%20Numbers%20Are%20Smaller%20Than%20the%20Current%20Number/README.md) | `数组`,`哈希表`,`计数`,`排序` | 简单 | | | [1366](https://leetcode-cn.com/problems/rank-teams-by-votes) | [通过投票对团队排名](/solution/1300-1399/1366.Rank%20Teams%20by%20Votes/README.md) | `数组`,`哈希表`,`字符串`,`计数`,`排序` | 中等 | | | [1367](https://leetcode-cn.com/problems/linked-list-in-binary-tree) | [二叉树中的列表](/solution/1300-1399/1367.Linked%20List%20in%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`链表`,`二叉树` | 中等 | | | [1368](https://leetcode-cn.com/problems/minimum-cost-to-make-at-least-one-valid-path-in-a-grid) | [使网格图至少有一条有效路径的最小代价](/solution/1300-1399/1368.Minimum%20Cost%20to%20Make%20at%20Least%20One%20Valid%20Path%20in%20a%20Grid/README.md) | `广度优先搜索`,`图`,`数组`,`矩阵`,`最短路`,`堆（优先队列）` | 困难 | | | [1369](https://leetcode-cn.com/problems/get-the-second-most-recent-activity) | [获取最近第二次的活动](/solution/1300-1399/1369.Get%20the%20Second%20Most%20Recent%20Activity/README.md) | `数据库` | 困难 | 🔒 | | [1370](https://leetcode-cn.com/problems/increasing-decreasing-string) | [上升下降字符串](/solution/1300-1399/1370.Increasing%20Decreasing%20String/README.md) | `哈希表`,`字符串`,`计数` | 简单 | | | [1371](https://leetcode-cn.com/problems/find-the-longest-substring-containing-vowels-in-even-counts) | [每个元音包含偶数次的最长子字符串](/solution/1300-1399/1371.Find%20the%20Longest%20Substring%20Containing%20Vowels%20in%20Even%20Counts/README.md) | `位运算`,`哈希表`,`字符串`,`前缀和` | 中等 | | | [1372](https://leetcode-cn.com/problems/longest-zigzag-path-in-a-binary-tree) | [二叉树中的最长交错路径](/solution/1300-1399/1372.Longest%20ZigZag%20Path%20in%20a%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`动态规划`,`二叉树` | 中等 | | | [1373](https://leetcode-cn.com/problems/maximum-sum-bst-in-binary-tree) | [二叉搜索子树的最大键值和](/solution/1300-1399/1373.Maximum%20Sum%20BST%20in%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`二叉搜索树`,`动态规划`,`二叉树` | 困难 | | | [1374](https://leetcode-cn.com/problems/generate-a-string-with-characters-that-have-odd-counts) | [生成每种字符都是奇数个的字符串](/solution/1300-1399/1374.Generate%20a%20String%20With%20Characters%20That%20Have%20Odd%20Counts/README.md) | `字符串` | 简单 | | | [1375](https://leetcode-cn.com/problems/number-of-times-binary-string-is-prefix-aligned) | [二进制字符串前缀一致的次数](/solution/1300-1399/1375.Number%20of%20Times%20Binary%20String%20Is%20Prefix-Aligned/README.md) | `数组` | 中等 | | | [1376](https://leetcode-cn.com/problems/time-needed-to-inform-all-employees) | [通知所有员工所需的时间](/solution/1300-1399/1376.Time%20Needed%20to%20Inform%20All%20Employees/README.md) | `树`,`深度优先搜索`,`广度优先搜索` | 中等 | | | [1377](https://leetcode-cn.com/problems/frog-position-after-t-seconds) | [T 秒后青蛙的位置](/solution/1300-1399/1377.Frog%20Position%20After%20T%20Seconds/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`图` | 困难 | | | [1378](https://leetcode-cn.com/problems/replace-employee-id-with-the-unique-identifier) | [使用唯一标识码替换员工 ID](/solution/1300-1399/1378.Replace%20Employee%20ID%20With%20The%20Unique%20Identifier/README.md) | `数据库` | 简单 | 🔒 | | [1379](https://leetcode-cn.com/problems/find-a-corresponding-node-of-a-binary-tree-in-a-clone-of-that-tree) | [找出克隆二叉树中的相同节点](/solution/1300-1399/1379.Find%20a%20Corresponding%20Node%20of%20a%20Binary%20Tree%20in%20a%20Clone%20of%20That%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉树` | 中等 | | | [1380](https://leetcode-cn.com/problems/lucky-numbers-in-a-matrix) | [矩阵中的幸运数](/solution/1300-1399/1380.Lucky%20Numbers%20in%20a%20Matrix/README.md) | `数组`,`矩阵` | 简单 | | | [1381](https://leetcode-cn.com/problems/design-a-stack-with-increment-operation) | [设计一个支持增量操作的栈](/solution/1300-1399/1381.Design%20a%20Stack%20With%20Increment%20Operation/README.md) | `栈`,`设计`,`数组` | 中等 | | | [1382](https://leetcode-cn.com/problems/balance-a-binary-search-tree) | [将二叉搜索树变平衡](/solution/1300-1399/1382.Balance%20a%20Binary%20Search%20Tree/README.md) | `贪心`,`树`,`深度优先搜索`,`二叉搜索树`,`分治`,`二叉树` | 中等 | | | [1383](https://leetcode-cn.com/problems/maximum-performance-of-a-team) | [最大的团队表现值](/solution/1300-1399/1383.Maximum%20Performance%20of%20a%20Team/README.md) | `贪心`,`数组`,`排序`,`堆（优先队列）` | 困难 | | | [1384](https://leetcode-cn.com/problems/total-sales-amount-by-year) | [按年度列出销售总额](/solution/1300-1399/1384.Total%20Sales%20Amount%20by%20Year/README.md) | `数据库` | 困难 | 🔒 | | [1385](https://leetcode-cn.com/problems/find-the-distance-value-between-two-arrays) | [两个数组间的距离值](/solution/1300-1399/1385.Find%20the%20Distance%20Value%20Between%20Two%20Arrays/README.md) | `数组`,`双指针`,`二分查找`,`排序` | 简单 | | | [1386](https://leetcode-cn.com/problems/cinema-seat-allocation) | [安排电影院座位](/solution/1300-1399/1386.Cinema%20Seat%20Allocation/README.md) | `贪心`,`位运算`,`数组`,`哈希表` | 中等 | | | [1387](https://leetcode-cn.com/problems/sort-integers-by-the-power-value) | [将整数按权重排序](/solution/1300-1399/1387.Sort%20Integers%20by%20The%20Power%20Value/README.md) | `记忆化搜索`,`动态规划`,`排序` | 中等 | | | [1388](https://leetcode-cn.com/problems/pizza-with-3n-slices) | [3n 块披萨](/solution/1300-1399/1388.Pizza%20With%203n%20Slices/README.md) | `贪心`,`数组`,`动态规划`,`堆（优先队列）` | 困难 | | | [1389](https://leetcode-cn.com/problems/create-target-array-in-the-given-order) | [按既定顺序创建目标数组](/solution/1300-1399/1389.Create%20Target%20Array%20in%20the%20Given%20Order/README.md) | `数组`,`模拟` | 简单 | | | [1390](https://leetcode-cn.com/problems/four-divisors) | [四因数](/solution/1300-1399/1390.Four%20Divisors/README.md) | `数组`,`数学` | 中等 | | | [1391](https://leetcode-cn.com/problems/check-if-there-is-a-valid-path-in-a-grid) | [检查网格中是否存在有效路径](/solution/1300-1399/1391.Check%20if%20There%20is%20a%20Valid%20Path%20in%20a%20Grid/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`数组`,`矩阵` | 中等 | | | [1392](https://leetcode-cn.com/problems/longest-happy-prefix) | [最长快乐前缀](/solution/1300-1399/1392.Longest%20Happy%20Prefix/README.md) | `字符串`,`字符串匹配`,`哈希函数`,`滚动哈希` | 困难 | | | [1393](https://leetcode-cn.com/problems/capital-gainloss) | [股票的资本损益](/solution/1300-1399/1393.Capital%20GainLoss/README.md) | `数据库` | 中等 | | | [1394](https://leetcode-cn.com/problems/find-lucky-integer-in-an-array) | [找出数组中的幸运数](/solution/1300-1399/1394.Find%20Lucky%20Integer%20in%20an%20Array/README.md) | `数组`,`哈希表`,`计数` | 简单 | | | [1395](https://leetcode-cn.com/problems/count-number-of-teams) | [统计作战单位数](/solution/1300-1399/1395.Count%20Number%20of%20Teams/README.md) | `树状数组`,`数组`,`动态规划` | 中等 | | | [1396](https://leetcode-cn.com/problems/design-underground-system) | [设计地铁系统](/solution/1300-1399/1396.Design%20Underground%20System/README.md) | `设计`,`哈希表`,`字符串` | 中等 | | | [1397](https://leetcode-cn.com/problems/find-all-good-strings) | [找到所有好字符串](/solution/1300-1399/1397.Find%20All%20Good%20Strings/README.md) | `字符串`,`动态规划`,`字符串匹配` | 困难 | | | [1398](https://leetcode-cn.com/problems/customers-who-bought-products-a-and-b-but-not-c) | [购买了产品 A 和产品 B 却没有购买产品 C 的顾客](/solution/1300-1399/1398.Customers%20Who%20Bought%20Products%20A%20and%20B%20but%20Not%20C/README.md) | `数据库` | 中等 | 🔒 | | [1399](https://leetcode-cn.com/problems/count-largest-group) | [统计最大组的数目](/solution/1300-1399/1399.Count%20Largest%20Group/README.md) | `哈希表`,`数学` | 简单 | | | [1400](https://leetcode-cn.com/problems/construct-k-palindrome-strings) | [构造 K 个回文字符串](/solution/1400-1499/1400.Construct%20K%20Palindrome%20Strings/README.md) | `贪心`,`哈希表`,`字符串`,`计数` | 中等 | | | [1401](https://leetcode-cn.com/problems/circle-and-rectangle-overlapping) | [圆和矩形是否有重叠](/solution/1400-1499/1401.Circle%20and%20Rectangle%20Overlapping/README.md) | `几何`,`数学` | 中等 | | | [1402](https://leetcode-cn.com/problems/reducing-dishes) | [做菜顺序](/solution/1400-1499/1402.Reducing%20Dishes/README.md) | `贪心`,`数组`,`动态规划`,`排序` | 困难 | | | [1403](https://leetcode-cn.com/problems/minimum-subsequence-in-non-increasing-order) | [非递增顺序的最小子序列](/solution/1400-1499/1403.Minimum%20Subsequence%20in%20Non-Increasing%20Order/README.md) | `贪心`,`数组`,`排序` | 简单 | | | [1404](https://leetcode-cn.com/problems/number-of-steps-to-reduce-a-number-in-binary-representation-to-one) | [将二进制表示减到 1 的步骤数](/solution/1400-1499/1404.Number%20of%20Steps%20to%20Reduce%20a%20Number%20in%20Binary%20Representation%20to%20One/README.md) | `位运算`,`字符串` | 中等 | | | [1405](https://leetcode-cn.com/problems/longest-happy-string) | [最长快乐字符串](/solution/1400-1499/1405.Longest%20Happy%20String/README.md) | `贪心`,`字符串`,`堆（优先队列）` | 中等 | | | [1406](https://leetcode-cn.com/problems/stone-game-iii) | [石子游戏 III](/solution/1400-1499/1406.Stone%20Game%20III/README.md) | `数组`,`数学`,`动态规划`,`博弈` | 困难 | | | [1407](https://leetcode-cn.com/problems/top-travellers) | [排名靠前的旅行者](/solution/1400-1499/1407.Top%20Travellers/README.md) | `数据库` | 简单 | | | [1408](https://leetcode-cn.com/problems/string-matching-in-an-array) | [数组中的字符串匹配](/solution/1400-1499/1408.String%20Matching%20in%20an%20Array/README.md) | `字符串`,`字符串匹配` | 简单 | | | [1409](https://leetcode-cn.com/problems/queries-on-a-permutation-with-key) | [查询带键的排列](/solution/1400-1499/1409.Queries%20on%20a%20Permutation%20With%20Key/README.md) | `树状数组`,`数组`,`模拟` | 中等 | | | [1410](https://leetcode-cn.com/problems/html-entity-parser) | [HTML 实体解析器](/solution/1400-1499/1410.HTML%20Entity%20Parser/README.md) | `哈希表`,`字符串` | 中等 | | | [1411](https://leetcode-cn.com/problems/number-of-ways-to-paint-n-3-grid) | [给 N x 3 网格图涂色的方案数](/solution/1400-1499/1411.Number%20of%20Ways%20to%20Paint%20N%20%C3%97%203%20Grid/README.md) | `动态规划` | 困难 | | | [1412](https://leetcode-cn.com/problems/find-the-quiet-students-in-all-exams) | [查找成绩处于中游的学生](/solution/1400-1499/1412.Find%20the%20Quiet%20Students%20in%20All%20Exams/README.md) | `数据库` | 困难 | 🔒 | | [1413](https://leetcode-cn.com/problems/minimum-value-to-get-positive-step-by-step-sum) | [逐步求和得到正数的最小值](/solution/1400-1499/1413.Minimum%20Value%20to%20Get%20Positive%20Step%20by%20Step%20Sum/README.md) | `数组`,`前缀和` | 简单 | | | [1414](https://leetcode-cn.com/problems/find-the-minimum-number-of-fibonacci-numbers-whose-sum-is-k) | [和为 K 的最少斐波那契数字数目](/solution/1400-1499/1414.Find%20the%20Minimum%20Number%20of%20Fibonacci%20Numbers%20Whose%20Sum%20Is%20K/README.md) | `贪心` | 中等 | | | [1415](https://leetcode-cn.com/problems/the-k-th-lexicographical-string-of-all-happy-strings-of-length-n) | [长度为 n 的开心字符串中字典序第 k 小的字符串](/solution/1400-1499/1415.The%20k-th%20Lexicographical%20String%20of%20All%20Happy%20Strings%20of%20Length%20n/README.md) | `字符串`,`回溯` | 中等 | | | [1416](https://leetcode-cn.com/problems/restore-the-array) | [恢复数组](/solution/1400-1499/1416.Restore%20The%20Array/README.md) | `字符串`,`动态规划` | 困难 | | | [1417](https://leetcode-cn.com/problems/reformat-the-string) | [重新格式化字符串](/solution/1400-1499/1417.Reformat%20The%20String/README.md) | `字符串` | 简单 | | | [1418](https://leetcode-cn.com/problems/display-table-of-food-orders-in-a-restaurant) | [点菜展示表](/solution/1400-1499/1418.Display%20Table%20of%20Food%20Orders%20in%20a%20Restaurant/README.md) | `数组`,`哈希表`,`字符串`,`有序集合`,`排序` | 中等 | | | [1419](https://leetcode-cn.com/problems/minimum-number-of-frogs-croaking) | [数青蛙](/solution/1400-1499/1419.Minimum%20Number%20of%20Frogs%20Croaking/README.md) | `字符串`,`计数` | 中等 | | | [1420](https://leetcode-cn.com/problems/build-array-where-you-can-find-the-maximum-exactly-k-comparisons) | [生成数组](/solution/1400-1499/1420.Build%20Array%20Where%20You%20Can%20Find%20The%20Maximum%20Exactly%20K%20Comparisons/README.md) | `动态规划` | 困难 | | | [1421](https://leetcode-cn.com/problems/npv-queries) | [净现值查询](/solution/1400-1499/1421.NPV%20Queries/README.md) | `数据库` | 简单 | 🔒 | | [1422](https://leetcode-cn.com/problems/maximum-score-after-splitting-a-string) | [分割字符串的最大得分](/solution/1400-1499/1422.Maximum%20Score%20After%20Splitting%20a%20String/README.md) | `字符串` | 简单 | | | [1423](https://leetcode-cn.com/problems/maximum-points-you-can-obtain-from-cards) | [可获得的最大点数](/solution/1400-1499/1423.Maximum%20Points%20You%20Can%20Obtain%20from%20Cards/README.md) | `数组`,`前缀和`,`滑动窗口` | 中等 | | | [1424](https://leetcode-cn.com/problems/diagonal-traverse-ii) | [对角线遍历 II](/solution/1400-1499/1424.Diagonal%20Traverse%20II/README.md) | `数组`,`排序`,`堆（优先队列）` | 中等 | | | [1425](https://leetcode-cn.com/problems/constrained-subsequence-sum) | [带限制的子序列和](/solution/1400-1499/1425.Constrained%20Subsequence%20Sum/README.md) | `队列`,`数组`,`动态规划`,`滑动窗口`,`单调队列`,`堆（优先队列）` | 困难 | | | [1426](https://leetcode-cn.com/problems/counting-elements) | [数元素](/solution/1400-1499/1426.Counting%20Elements/README.md) | `数组`,`哈希表` | 简单 | 🔒 | | [1427](https://leetcode-cn.com/problems/perform-string-shifts) | [字符串的左右移](/solution/1400-1499/1427.Perform%20String%20Shifts/README.md) | `数组`,`数学`,`字符串` | 简单 | 🔒 | | [1428](https://leetcode-cn.com/problems/leftmost-column-with-at-least-a-one) | [至少有一个 1 的最左端列](/solution/1400-1499/1428.Leftmost%20Column%20with%20at%20Least%20a%20One/README.md) | `数组`,`二分查找`,`交互`,`矩阵` | 中等 | 🔒 | | [1429](https://leetcode-cn.com/problems/first-unique-number) | [第一个唯一数字](/solution/1400-1499/1429.First%20Unique%20Number/README.md) | `设计`,`队列`,`数组`,`哈希表`,`数据流` | 中等 | 🔒 | | [1430](https://leetcode-cn.com/problems/check-if-a-string-is-a-valid-sequence-from-root-to-leaves-path-in-a-binary-tree) | [判断给定的序列是否是二叉树从根到叶的路径](/solution/1400-1499/1430.Check%20If%20a%20String%20Is%20a%20Valid%20Sequence%20from%20Root%20to%20Leaves%20Path%20in%20a%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉树` | 中等 | 🔒 | | [1431](https://leetcode-cn.com/problems/kids-with-the-greatest-number-of-candies) | [拥有最多糖果的孩子](/solution/1400-1499/1431.Kids%20With%20the%20Greatest%20Number%20of%20Candies/README.md) | `数组` | 简单 | | | [1432](https://leetcode-cn.com/problems/max-difference-you-can-get-from-changing-an-integer) | [改变一个整数能得到的最大差值](/solution/1400-1499/1432.Max%20Difference%20You%20Can%20Get%20From%20Changing%20an%20Integer/README.md) | `贪心`,`数学` | 中等 | | | [1433](https://leetcode-cn.com/problems/check-if-a-string-can-break-another-string) | [检查一个字符串是否可以打破另一个字符串](/solution/1400-1499/1433.Check%20If%20a%20String%20Can%20Break%20Another%20String/README.md) | `贪心`,`字符串`,`排序` | 中等 | | | [1434](https://leetcode-cn.com/problems/number-of-ways-to-wear-different-hats-to-each-other) | [每个人戴不同帽子的方案数](/solution/1400-1499/1434.Number%20of%20Ways%20to%20Wear%20Different%20Hats%20to%20Each%20Other/README.md) | `位运算`,`数组`,`动态规划`,`状态压缩` | 困难 | | | [1435](https://leetcode-cn.com/problems/create-a-session-bar-chart) | [制作会话柱状图](/solution/1400-1499/1435.Create%20a%20Session%20Bar%20Chart/README.md) | `数据库` | 简单 | 🔒 | | [1436](https://leetcode-cn.com/problems/destination-city) | [旅行终点站](/solution/1400-1499/1436.Destination%20City/README.md) | `哈希表`,`字符串` | 简单 | | | [1437](https://leetcode-cn.com/problems/check-if-all-1s-are-at-least-length-k-places-away) | [是否所有 1 都至少相隔 k 个元素](/solution/1400-1499/1437.Check%20If%20All%201%27s%20Are%20at%20Least%20Length%20K%20Places%20Away/README.md) | `数组` | 简单 | | | [1438](https://leetcode-cn.com/problems/longest-continuous-subarray-with-absolute-diff-less-than-or-equal-to-limit) | [绝对差不超过限制的最长连续子数组](/solution/1400-1499/1438.Longest%20Continuous%20Subarray%20With%20Absolute%20Diff%20Less%20Than%20or%20Equal%20to%20Limit/README.md) | `队列`,`数组`,`有序集合`,`滑动窗口`,`单调队列`,`堆（优先队列）` | 中等 | | | [1439](https://leetcode-cn.com/problems/find-the-kth-smallest-sum-of-a-matrix-with-sorted-rows) | [有序矩阵中的第 k 个最小数组和](/solution/1400-1499/1439.Find%20the%20Kth%20Smallest%20Sum%20of%20a%20Matrix%20With%20Sorted%20Rows/README.md) | `数组`,`二分查找`,`矩阵`,`堆（优先队列）` | 困难 | | | [1440](https://leetcode-cn.com/problems/evaluate-boolean-expression) | [计算布尔表达式的值](/solution/1400-1499/1440.Evaluate%20Boolean%20Expression/README.md) | `数据库` | 中等 | 🔒 | | [1441](https://leetcode-cn.com/problems/build-an-array-with-stack-operations) | [用栈操作构建数组](/solution/1400-1499/1441.Build%20an%20Array%20With%20Stack%20Operations/README.md) | `栈`,`数组`,`模拟` | 简单 | | | [1442](https://leetcode-cn.com/problems/count-triplets-that-can-form-two-arrays-of-equal-xor) | [形成两个异或相等数组的三元组数目](/solution/1400-1499/1442.Count%20Triplets%20That%20Can%20Form%20Two%20Arrays%20of%20Equal%20XOR/README.md) | `位运算`,`数组`,`哈希表`,`数学`,`前缀和` | 中等 | | | [1443](https://leetcode-cn.com/problems/minimum-time-to-collect-all-apples-in-a-tree) | [收集树上所有苹果的最少时间](/solution/1400-1499/1443.Minimum%20Time%20to%20Collect%20All%20Apples%20in%20a%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`哈希表` | 中等 | | | [1444](https://leetcode-cn.com/problems/number-of-ways-of-cutting-a-pizza) | [切披萨的方案数](/solution/1400-1499/1444.Number%20of%20Ways%20of%20Cutting%20a%20Pizza/README.md) | `记忆化搜索`,`数组`,`动态规划`,`矩阵` | 困难 | | | [1445](https://leetcode-cn.com/problems/apples-oranges) | [苹果和桔子](/solution/1400-1499/1445.Apples%20%26%20Oranges/README.md) | `数据库` | 中等 | 🔒 | | [1446](https://leetcode-cn.com/problems/consecutive-characters) | [连续字符](/solution/1400-1499/1446.Consecutive%20Characters/README.md) | `字符串` | 简单 | | | [1447](https://leetcode-cn.com/problems/simplified-fractions) | [最简分数](/solution/1400-1499/1447.Simplified%20Fractions/README.md) | `数学`,`字符串`,`数论` | 中等 | | | [1448](https://leetcode-cn.com/problems/count-good-nodes-in-binary-tree) | [统计二叉树中好节点的数目](/solution/1400-1499/1448.Count%20Good%20Nodes%20in%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉树` | 中等 | | | [1449](https://leetcode-cn.com/problems/form-largest-integer-with-digits-that-add-up-to-target) | [数位成本和为目标值的最大数字](/solution/1400-1499/1449.Form%20Largest%20Integer%20With%20Digits%20That%20Add%20up%20to%20Target/README.md) | `数组`,`动态规划` | 困难 | | | [1450](https://leetcode-cn.com/problems/number-of-students-doing-homework-at-a-given-time) | [在既定时间做作业的学生人数](/solution/1400-1499/1450.Number%20of%20Students%20Doing%20Homework%20at%20a%20Given%20Time/README.md) | `数组` | 简单 | | | [1451](https://leetcode-cn.com/problems/rearrange-words-in-a-sentence) | [重新排列句子中的单词](/solution/1400-1499/1451.Rearrange%20Words%20in%20a%20Sentence/README.md) | `字符串`,`排序` | 中等 | | | [1452](https://leetcode-cn.com/problems/people-whose-list-of-favorite-companies-is-not-a-subset-of-another-list) | [收藏清单](/solution/1400-1499/1452.People%20Whose%20List%20of%20Favorite%20Companies%20Is%20Not%20a%20Subset%20of%20Another%20List/README.md) | `数组`,`哈希表`,`字符串` | 中等 | | | [1453](https://leetcode-cn.com/problems/maximum-number-of-darts-inside-of-a-circular-dartboard) | [圆形靶内的最大飞镖数量](/solution/1400-1499/1453.Maximum%20Number%20of%20Darts%20Inside%20of%20a%20Circular%20Dartboard/README.md) | `几何`,`数组`,`数学` | 困难 | | | [1454](https://leetcode-cn.com/problems/active-users) | [活跃用户](/solution/1400-1499/1454.Active%20Users/README.md) | `数据库` | 中等 | 🔒 | | [1455](https://leetcode-cn.com/problems/check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence) | [检查单词是否为句中其他单词的前缀](/solution/1400-1499/1455.Check%20If%20a%20Word%20Occurs%20As%20a%20Prefix%20of%20Any%20Word%20in%20a%20Sentence/README.md) | `字符串`,`字符串匹配` | 简单 | | | [1456](https://leetcode-cn.com/problems/maximum-number-of-vowels-in-a-substring-of-given-length) | [定长子串中元音的最大数目](/solution/1400-1499/1456.Maximum%20Number%20of%20Vowels%20in%20a%20Substring%20of%20Given%20Length/README.md) | `字符串`,`滑动窗口` | 中等 | | | [1457](https://leetcode-cn.com/problems/pseudo-palindromic-paths-in-a-binary-tree) | [二叉树中的伪回文路径](/solution/1400-1499/1457.Pseudo-Palindromic%20Paths%20in%20a%20Binary%20Tree/README.md) | `位运算`,`树`,`深度优先搜索`,`广度优先搜索`,`二叉树` | 中等 | | | [1458](https://leetcode-cn.com/problems/max-dot-product-of-two-subsequences) | [两个子序列的最大点积](/solution/1400-1499/1458.Max%20Dot%20Product%20of%20Two%20Subsequences/README.md) | `数组`,`动态规划` | 困难 | | | [1459](https://leetcode-cn.com/problems/rectangles-area) | [矩形面积](/solution/1400-1499/1459.Rectangles%20Area/README.md) | `数据库` | 中等 | 🔒 | | [1460](https://leetcode-cn.com/problems/make-two-arrays-equal-by-reversing-sub-arrays) | [通过翻转子数组使两个数组相等](/solution/1400-1499/1460.Make%20Two%20Arrays%20Equal%20by%20Reversing%20Sub-arrays/README.md) | `数组`,`哈希表`,`排序` | 简单 | | | [1461](https://leetcode-cn.com/problems/check-if-a-string-contains-all-binary-codes-of-size-k) | [检查一个字符串是否包含所有长度为 K 的二进制子串](/solution/1400-1499/1461.Check%20If%20a%20String%20Contains%20All%20Binary%20Codes%20of%20Size%20K/README.md) | `位运算`,`哈希表`,`字符串`,`哈希函数`,`滚动哈希` | 中等 | | | [1462](https://leetcode-cn.com/problems/course-schedule-iv) | [课程表 IV](/solution/1400-1499/1462.Course%20Schedule%20IV/README.md) | `深度优先搜索`,`广度优先搜索`,`图`,`拓扑排序` | 中等 | | | [1463](https://leetcode-cn.com/problems/cherry-pickup-ii) | [摘樱桃 II](/solution/1400-1499/1463.Cherry%20Pickup%20II/README.md) | `数组`,`动态规划`,`矩阵` | 困难 | | | [1464](https://leetcode-cn.com/problems/maximum-product-of-two-elements-in-an-array) | [数组中两元素的最大乘积](/solution/1400-1499/1464.Maximum%20Product%20of%20Two%20Elements%20in%20an%20Array/README.md) | `数组`,`排序`,`堆（优先队列）` | 简单 | | | [1465](https://leetcode-cn.com/problems/maximum-area-of-a-piece-of-cake-after-horizontal-and-vertical-cuts) | [切割后面积最大的蛋糕](/solution/1400-1499/1465.Maximum%20Area%20of%20a%20Piece%20of%20Cake%20After%20Horizontal%20and%20Vertical%20Cuts/README.md) | `贪心`,`数组`,`排序` | 中等 | | | [1466](https://leetcode-cn.com/problems/reorder-routes-to-make-all-paths-lead-to-the-city-zero) | [重新规划路线](/solution/1400-1499/1466.Reorder%20Routes%20to%20Make%20All%20Paths%20Lead%20to%20the%20City%20Zero/README.md) | `深度优先搜索`,`广度优先搜索`,`图` | 中等 | | | [1467](https://leetcode-cn.com/problems/probability-of-a-two-boxes-having-the-same-number-of-distinct-balls) | [两个盒子中球的颜色数相同的概率](/solution/1400-1499/1467.Probability%20of%20a%20Two%20Boxes%20Having%20The%20Same%20Number%20of%20Distinct%20Balls/README.md) | `数学`,`动态规划`,`回溯`,`组合数学`,`概率与统计` | 困难 | | | [1468](https://leetcode-cn.com/problems/calculate-salaries) | [计算税后工资](/solution/1400-1499/1468.Calculate%20Salaries/README.md) | `数据库` | 中等 | 🔒 | | [1469](https://leetcode-cn.com/problems/find-all-the-lonely-nodes) | [寻找所有的独生节点](/solution/1400-1499/1469.Find%20All%20The%20Lonely%20Nodes/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`二叉树` | 简单 | 🔒 | | [1470](https://leetcode-cn.com/problems/shuffle-the-array) | [重新排列数组](/solution/1400-1499/1470.Shuffle%20the%20Array/README.md) | `数组` | 简单 | | | [1471](https://leetcode-cn.com/problems/the-k-strongest-values-in-an-array) | [数组中的 k 个最强值](/solution/1400-1499/1471.The%20k%20Strongest%20Values%20in%20an%20Array/README.md) | `数组`,`双指针`,`排序` | 中等 | | | [1472](https://leetcode-cn.com/problems/design-browser-history) | [设计浏览器历史记录](/solution/1400-1499/1472.Design%20Browser%20History/README.md) | `栈`,`设计`,`数组`,`链表`,`数据流`,`双向链表` | 中等 | | | [1473](https://leetcode-cn.com/problems/paint-house-iii) | [粉刷房子 III](/solution/1400-1499/1473.Paint%20House%20III/README.md) | `数组`,`动态规划` | 困难 | | | [1474](https://leetcode-cn.com/problems/delete-n-nodes-after-m-nodes-of-a-linked-list) | [删除链表 M 个节点之后的 N 个节点](/solution/1400-1499/1474.Delete%20N%20Nodes%20After%20M%20Nodes%20of%20a%20Linked%20List/README.md) | `链表` | 简单 | 🔒 | | [1475](https://leetcode-cn.com/problems/final-prices-with-a-special-discount-in-a-shop) | [商品折扣后的最终价格](/solution/1400-1499/1475.Final%20Prices%20With%20a%20Special%20Discount%20in%20a%20Shop/README.md) | `栈`,`数组`,`单调栈` | 简单 | | | [1476](https://leetcode-cn.com/problems/subrectangle-queries) | [子矩形查询](/solution/1400-1499/1476.Subrectangle%20Queries/README.md) | `设计`,`数组`,`矩阵` | 中等 | | | [1477](https://leetcode-cn.com/problems/find-two-non-overlapping-sub-arrays-each-with-target-sum) | [找两个和为目标值且不重叠的子数组](/solution/1400-1499/1477.Find%20Two%20Non-overlapping%20Sub-arrays%20Each%20With%20Target%20Sum/README.md) | `数组`,`哈希表`,`二分查找`,`动态规划`,`滑动窗口` | 中等 | | | [1478](https://leetcode-cn.com/problems/allocate-mailboxes) | [安排邮筒](/solution/1400-1499/1478.Allocate%20Mailboxes/README.md) | `数组`,`数学`,`动态规划`,`排序` | 困难 | | | [1479](https://leetcode-cn.com/problems/sales-by-day-of-the-week) | [周内每天的销售情况](/solution/1400-1499/1479.Sales%20by%20Day%20of%20the%20Week/README.md) | `数据库` | 困难 | 🔒 | | [1480](https://leetcode-cn.com/problems/running-sum-of-1d-array) | [一维数组的动态和](/solution/1400-1499/1480.Running%20Sum%20of%201d%20Array/README.md) | `数组`,`前缀和` | 简单 | | | [1481](https://leetcode-cn.com/problems/least-number-of-unique-integers-after-k-removals) | [不同整数的最少数目](/solution/1400-1499/1481.Least%20Number%20of%20Unique%20Integers%20after%20K%20Removals/README.md) | `贪心`,`数组`,`哈希表`,`计数`,`排序` | 中等 | | | [1482](https://leetcode-cn.com/problems/minimum-number-of-days-to-make-m-bouquets) | [制作 m 束花所需的最少天数](/solution/1400-1499/1482.Minimum%20Number%20of%20Days%20to%20Make%20m%20Bouquets/README.md) | `数组`,`二分查找` | 中等 | | | [1483](https://leetcode-cn.com/problems/kth-ancestor-of-a-tree-node) | [树节点的第 K 个祖先](/solution/1400-1499/1483.Kth%20Ancestor%20of%20a%20Tree%20Node/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`设计`,`二分查找`,`动态规划` | 困难 | | | [1484](https://leetcode-cn.com/problems/group-sold-products-by-the-date) | [按日期分组销售产品](/solution/1400-1499/1484.Group%20Sold%20Products%20By%20The%20Date/README.md) | `数据库` | 简单 | | | [1485](https://leetcode-cn.com/problems/clone-binary-tree-with-random-pointer) | [克隆含随机指针的二叉树](/solution/1400-1499/1485.Clone%20Binary%20Tree%20With%20Random%20Pointer/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`哈希表`,`二叉树` | 中等 | 🔒 | | [1486](https://leetcode-cn.com/problems/xor-operation-in-an-array) | [数组异或操作](/solution/1400-1499/1486.XOR%20Operation%20in%20an%20Array/README.md) | `位运算`,`数学` | 简单 | | | [1487](https://leetcode-cn.com/problems/making-file-names-unique) | [保证文件名唯一](/solution/1400-1499/1487.Making%20File%20Names%20Unique/README.md) | `数组`,`哈希表`,`字符串` | 中等 | | | [1488](https://leetcode-cn.com/problems/avoid-flood-in-the-city) | [避免洪水泛滥](/solution/1400-1499/1488.Avoid%20Flood%20in%20The%20City/README.md) | `贪心`,`数组`,`哈希表`,`二分查找`,`堆（优先队列）` | 中等 | | | [1489](https://leetcode-cn.com/problems/find-critical-and-pseudo-critical-edges-in-minimum-spanning-tree) | [找到最小生成树里的关键边和伪关键边](/solution/1400-1499/1489.Find%20Critical%20and%20Pseudo-Critical%20Edges%20in%20Minimum%20Spanning%20Tree/README.md) | `并查集`,`图`,`最小生成树`,`排序`,`强连通分量` | 困难 | | | [1490](https://leetcode-cn.com/problems/clone-n-ary-tree) | [克隆 N 叉树](/solution/1400-1499/1490.Clone%20N-ary%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`哈希表` | 中等 | 🔒 | | [1491](https://leetcode-cn.com/problems/average-salary-excluding-the-minimum-and-maximum-salary) | [去掉最低工资和最高工资后的工资平均值](/solution/1400-1499/1491.Average%20Salary%20Excluding%20the%20Minimum%20and%20Maximum%20Salary/README.md) | `数组`,`排序` | 简单 | | | [1492](https://leetcode-cn.com/problems/the-kth-factor-of-n) | [n 的第 k 个因子](/solution/1400-1499/1492.The%20kth%20Factor%20of%20n/README.md) | `数学` | 中等 | | | [1493](https://leetcode-cn.com/problems/longest-subarray-of-1s-after-deleting-one-element) | [删掉一个元素以后全为 1 的最长子数组](/solution/1400-1499/1493.Longest%20Subarray%20of%201%27s%20After%20Deleting%20One%20Element/README.md) | `数学`,`动态规划`,`滑动窗口` | 中等 | | | [1494](https://leetcode-cn.com/problems/parallel-courses-ii) | [并行课程 II](/solution/1400-1499/1494.Parallel%20Courses%20II/README.md) | `位运算`,`图`,`动态规划`,`状态压缩` | 困难 | | | [1495](https://leetcode-cn.com/problems/friendly-movies-streamed-last-month) | [上月播放的儿童适宜电影](/solution/1400-1499/1495.Friendly%20Movies%20Streamed%20Last%20Month/README.md) | `数据库` | 简单 | 🔒 | | [1496](https://leetcode-cn.com/problems/path-crossing) | [判断路径是否相交](/solution/1400-1499/1496.Path%20Crossing/README.md) | `哈希表`,`字符串` | 简单 | | | [1497](https://leetcode-cn.com/problems/check-if-array-pairs-are-divisible-by-k) | [检查数组对是否可以被 k 整除](/solution/1400-1499/1497.Check%20If%20Array%20Pairs%20Are%20Divisible%20by%20k/README.md) | `数组`,`哈希表`,`计数` | 中等 | | | [1498](https://leetcode-cn.com/problems/number-of-subsequences-that-satisfy-the-given-sum-condition) | [满足条件的子序列数目](/solution/1400-1499/1498.Number%20of%20Subsequences%20That%20Satisfy%20the%20Given%20Sum%20Condition/README.md) | `数组`,`双指针`,`二分查找`,`排序` | 中等 | | | [1499](https://leetcode-cn.com/problems/max-value-of-equation) | [满足不等式的最大值](/solution/1400-1499/1499.Max%20Value%20of%20Equation/README.md) | `队列`,`数组`,`滑动窗口`,`单调队列`,`堆（优先队列）` | 困难 | | | [1500](https://leetcode-cn.com/problems/design-a-file-sharing-system) | [设计文件分享系统](/solution/1500-1599/1500.Design%20a%20File%20Sharing%20System/README.md) | `设计`,`哈希表`,`数据流`,`堆（优先队列）` | 中等 | 🔒 | | [1501](https://leetcode-cn.com/problems/countries-you-can-safely-invest-in) | [可以放心投资的国家](/solution/1500-1599/1501.Countries%20You%20Can%20Safely%20Invest%20In/README.md) | `数据库` | 中等 | 🔒 | | [1502](https://leetcode-cn.com/problems/can-make-arithmetic-progression-from-sequence) | [判断能否形成等差数列](/solution/1500-1599/1502.Can%20Make%20Arithmetic%20Progression%20From%20Sequence/README.md) | `数组`,`排序` | 简单 | | | [1503](https://leetcode-cn.com/problems/last-moment-before-all-ants-fall-out-of-a-plank) | [所有蚂蚁掉下来前的最后一刻](/solution/1500-1599/1503.Last%20Moment%20Before%20All%20Ants%20Fall%20Out%20of%20a%20Plank/README.md) | `脑筋急转弯`,`数组`,`模拟` | 中等 | | | [1504](https://leetcode-cn.com/problems/count-submatrices-with-all-ones) | [统计全 1 子矩形](/solution/1500-1599/1504.Count%20Submatrices%20With%20All%20Ones/README.md) | `栈`,`数组`,`动态规划`,`矩阵`,`单调栈` | 中等 | | | [1505](https://leetcode-cn.com/problems/minimum-possible-integer-after-at-most-k-adjacent-swaps-on-digits) | [最多 K 次交换相邻数位后得到的最小整数](/solution/1500-1599/1505.Minimum%20Possible%20Integer%20After%20at%20Most%20K%20Adjacent%20Swaps%20On%20Digits/README.md) | `贪心`,`树状数组`,`线段树`,`字符串` | 困难 | | | [1506](https://leetcode-cn.com/problems/find-root-of-n-ary-tree) | [找到 N 叉树的根节点](/solution/1500-1599/1506.Find%20Root%20of%20N-Ary%20Tree/README.md) | `位运算`,`树`,`深度优先搜索`,`哈希表` | 中等 | 🔒 | | [1507](https://leetcode-cn.com/problems/reformat-date) | [转变日期格式](/solution/1500-1599/1507.Reformat%20Date/README.md) | `字符串` | 简单 | | | [1508](https://leetcode-cn.com/problems/range-sum-of-sorted-subarray-sums) | [子数组和排序后的区间和](/solution/1500-1599/1508.Range%20Sum%20of%20Sorted%20Subarray%20Sums/README.md) | `数组`,`双指针`,`二分查找`,`排序` | 中等 | | | [1509](https://leetcode-cn.com/problems/minimum-difference-between-largest-and-smallest-value-in-three-moves) | [三次操作后最大值与最小值的最小差](/solution/1500-1599/1509.Minimum%20Difference%20Between%20Largest%20and%20Smallest%20Value%20in%20Three%20Moves/README.md) | `贪心`,`数组`,`排序` | 中等 | | | [1510](https://leetcode-cn.com/problems/stone-game-iv) | [石子游戏 IV](/solution/1500-1599/1510.Stone%20Game%20IV/README.md) | `数学`,`动态规划`,`博弈` | 困难 | | | [1511](https://leetcode-cn.com/problems/customer-order-frequency) | [消费者下单频率](/solution/1500-1599/1511.Customer%20Order%20Frequency/README.md) | `数据库` | 简单 | 🔒 | | [1512](https://leetcode-cn.com/problems/number-of-good-pairs) | [好数对的数目](/solution/1500-1599/1512.Number%20of%20Good%20Pairs/README.md) | `数组`,`哈希表`,`数学`,`计数` | 简单 | | | [1513](https://leetcode-cn.com/problems/number-of-substrings-with-only-1s) | [仅含 1 的子串数](/solution/1500-1599/1513.Number%20of%20Substrings%20With%20Only%201s/README.md) | `数学`,`字符串` | 中等 | | | [1514](https://leetcode-cn.com/problems/path-with-maximum-probability) | [概率最大的路径](/solution/1500-1599/1514.Path%20with%20Maximum%20Probability/README.md) | `图`,`最短路`,`堆（优先队列）` | 中等 | | | [1515](https://leetcode-cn.com/problems/best-position-for-a-service-centre) | [服务中心的最佳位置](/solution/1500-1599/1515.Best%20Position%20for%20a%20Service%20Centre/README.md) | `几何`,`数学`,`随机化` | 困难 | | | [1516](https://leetcode-cn.com/problems/move-sub-tree-of-n-ary-tree) | [移动 N 叉树的子树](/solution/1500-1599/1516.Move%20Sub-Tree%20of%20N-Ary%20Tree/README.md) | `树`,`深度优先搜索` | 困难 | 🔒 | | [1517](https://leetcode-cn.com/problems/find-users-with-valid-e-mails) | [查找拥有有效邮箱的用户](/solution/1500-1599/1517.Find%20Users%20With%20Valid%20E-Mails/README.md) | `数据库` | 简单 | 🔒 | | [1518](https://leetcode-cn.com/problems/water-bottles) | [换酒问题](/solution/1500-1599/1518.Water%20Bottles/README.md) | `数学`,`模拟` | 简单 | | | [1519](https://leetcode-cn.com/problems/number-of-nodes-in-the-sub-tree-with-the-same-label) | [子树中标签相同的节点数](/solution/1500-1599/1519.Number%20of%20Nodes%20in%20the%20Sub-Tree%20With%20the%20Same%20Label/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`哈希表`,`计数` | 中等 | | | [1520](https://leetcode-cn.com/problems/maximum-number-of-non-overlapping-substrings) | [最多的不重叠子字符串](/solution/1500-1599/1520.Maximum%20Number%20of%20Non-Overlapping%20Substrings/README.md) | `贪心`,`字符串` | 困难 | | | [1521](https://leetcode-cn.com/problems/find-a-value-of-a-mysterious-function-closest-to-target) | [找到最接近目标值的函数值](/solution/1500-1599/1521.Find%20a%20Value%20of%20a%20Mysterious%20Function%20Closest%20to%20Target/README.md) | `位运算`,`线段树`,`数组`,`二分查找` | 困难 | | | [1522](https://leetcode-cn.com/problems/diameter-of-n-ary-tree) | [N 叉树的直径](/solution/1500-1599/1522.Diameter%20of%20N-Ary%20Tree/README.md) | `树`,`深度优先搜索` | 中等 | 🔒 | | [1523](https://leetcode-cn.com/problems/count-odd-numbers-in-an-interval-range) | [在区间范围内统计奇数数目](/solution/1500-1599/1523.Count%20Odd%20Numbers%20in%20an%20Interval%20Range/README.md) | `数学` | 简单 | | | [1524](https://leetcode-cn.com/problems/number-of-sub-arrays-with-odd-sum) | [和为奇数的子数组数目](/solution/1500-1599/1524.Number%20of%20Sub-arrays%20With%20Odd%20Sum/README.md) | `数组`,`数学`,`动态规划`,`前缀和` | 中等 | | | [1525](https://leetcode-cn.com/problems/number-of-good-ways-to-split-a-string) | [字符串的好分割数目](/solution/1500-1599/1525.Number%20of%20Good%20Ways%20to%20Split%20a%20String/README.md) | `位运算`,`字符串`,`动态规划` | 中等 | | | [1526](https://leetcode-cn.com/problems/minimum-number-of-increments-on-subarrays-to-form-a-target-array) | [形成目标数组的子数组最少增加次数](/solution/1500-1599/1526.Minimum%20Number%20of%20Increments%20on%20Subarrays%20to%20Form%20a%20Target%20Array/README.md) | `栈`,`贪心`,`数组`,`动态规划`,`单调栈` | 困难 | | | [1527](https://leetcode-cn.com/problems/patients-with-a-condition) | [患某种疾病的患者](/solution/1500-1599/1527.Patients%20With%20a%20Condition/README.md) | `数据库` | 简单 | | | [1528](https://leetcode-cn.com/problems/shuffle-string) | [重新排列字符串](/solution/1500-1599/1528.Shuffle%20String/README.md) | `数组`,`字符串` | 简单 | | | [1529](https://leetcode-cn.com/problems/minimum-suffix-flips) | [最少的后缀翻转次数](/solution/1500-1599/1529.Minimum%20Suffix%20Flips/README.md) | `贪心`,`字符串` | 中等 | | | [1530](https://leetcode-cn.com/problems/number-of-good-leaf-nodes-pairs) | [好叶子节点对的数量](/solution/1500-1599/1530.Number%20of%20Good%20Leaf%20Nodes%20Pairs/README.md) | `树`,`深度优先搜索`,`二叉树` | 中等 | | | [1531](https://leetcode-cn.com/problems/string-compression-ii) | [压缩字符串 II](/solution/1500-1599/1531.String%20Compression%20II/README.md) | `字符串`,`动态规划` | 困难 | | | [1532](https://leetcode-cn.com/problems/the-most-recent-three-orders) | [最近的三笔订单](/solution/1500-1599/1532.The%20Most%20Recent%20Three%20Orders/README.md) | `数据库` | 中等 | 🔒 | | [1533](https://leetcode-cn.com/problems/find-the-index-of-the-large-integer) | [找到最大整数的索引](/solution/1500-1599/1533.Find%20the%20Index%20of%20the%20Large%20Integer/README.md) | `数组`,`二分查找`,`交互` | 中等 | 🔒 | | [1534](https://leetcode-cn.com/problems/count-good-triplets) | [统计好三元组](/solution/1500-1599/1534.Count%20Good%20Triplets/README.md) | `数组`,`枚举` | 简单 | | | [1535](https://leetcode-cn.com/problems/find-the-winner-of-an-array-game) | [找出数组游戏的赢家](/solution/1500-1599/1535.Find%20the%20Winner%20of%20an%20Array%20Game/README.md) | `数组`,`模拟` | 中等 | | | [1536](https://leetcode-cn.com/problems/minimum-swaps-to-arrange-a-binary-grid) | [排布二进制网格的最少交换次数](/solution/1500-1599/1536.Minimum%20Swaps%20to%20Arrange%20a%20Binary%20Grid/README.md) | `贪心`,`数组`,`矩阵` | 中等 | | | [1537](https://leetcode-cn.com/problems/get-the-maximum-score) | [最大得分](/solution/1500-1599/1537.Get%20the%20Maximum%20Score/README.md) | `贪心`,`数组`,`双指针`,`动态规划` | 困难 | | | [1538](https://leetcode-cn.com/problems/guess-the-majority-in-a-hidden-array) | [找出隐藏数组中出现次数最多的元素](/solution/1500-1599/1538.Guess%20the%20Majority%20in%20a%20Hidden%20Array/README.md) | `数组`,`数学`,`交互` | 中等 | 🔒 | | [1539](https://leetcode-cn.com/problems/kth-missing-positive-number) | [第 k 个缺失的正整数](/solution/1500-1599/1539.Kth%20Missing%20Positive%20Number/README.md) | `数组`,`二分查找` | 简单 | | | [1540](https://leetcode-cn.com/problems/can-convert-string-in-k-moves) | [K 次操作转变字符串](/solution/1500-1599/1540.Can%20Convert%20String%20in%20K%20Moves/README.md) | `哈希表`,`字符串` | 中等 | | | [1541](https://leetcode-cn.com/problems/minimum-insertions-to-balance-a-parentheses-string) | [平衡括号字符串的最少插入次数](/solution/1500-1599/1541.Minimum%20Insertions%20to%20Balance%20a%20Parentheses%20String/README.md) | `栈`,`贪心`,`字符串` | 中等 | | | [1542](https://leetcode-cn.com/problems/find-longest-awesome-substring) | [找出最长的超赞子字符串](/solution/1500-1599/1542.Find%20Longest%20Awesome%20Substring/README.md) | `位运算`,`哈希表`,`字符串` | 困难 | | | [1543](https://leetcode-cn.com/problems/fix-product-name-format) | [产品名称格式修复](/solution/1500-1599/1543.Fix%20Product%20Name%20Format/README.md) | `数据库` | 简单 | 🔒 | | [1544](https://leetcode-cn.com/problems/make-the-string-great) | [整理字符串](/solution/1500-1599/1544.Make%20The%20String%20Great/README.md) | `栈`,`字符串` | 简单 | | | [1545](https://leetcode-cn.com/problems/find-kth-bit-in-nth-binary-string) | [找出第 N 个二进制字符串中的第 K 位](/solution/1500-1599/1545.Find%20Kth%20Bit%20in%20Nth%20Binary%20String/README.md) | `递归`,`字符串` | 中等 | | | [1546](https://leetcode-cn.com/problems/maximum-number-of-non-overlapping-subarrays-with-sum-equals-target) | [和为目标值且不重叠的非空子数组的最大数目](/solution/1500-1599/1546.Maximum%20Number%20of%20Non-Overlapping%20Subarrays%20With%20Sum%20Equals%20Target/README.md) | `贪心`,`数组`,`哈希表`,`前缀和` | 中等 | | | [1547](https://leetcode-cn.com/problems/minimum-cost-to-cut-a-stick) | [切棍子的最小成本](/solution/1500-1599/1547.Minimum%20Cost%20to%20Cut%20a%20Stick/README.md) | `数组`,`动态规划` | 困难 | | | [1548](https://leetcode-cn.com/problems/the-most-similar-path-in-a-graph) | [图中最相似的路径](/solution/1500-1599/1548.The%20Most%20Similar%20Path%20in%20a%20Graph/README.md) | `图`,`动态规划` | 困难 | 🔒 | | [1549](https://leetcode-cn.com/problems/the-most-recent-orders-for-each-product) | [每件商品的最新订单](/solution/1500-1599/1549.The%20Most%20Recent%20Orders%20for%20Each%20Product/README.md) | `数据库` | 中等 | 🔒 | | [1550](https://leetcode-cn.com/problems/three-consecutive-odds) | [存在连续三个奇数的数组](/solution/1500-1599/1550.Three%20Consecutive%20Odds/README.md) | `数组` | 简单 | | | [1551](https://leetcode-cn.com/problems/minimum-operations-to-make-array-equal) | [使数组中所有元素相等的最小操作数](/solution/1500-1599/1551.Minimum%20Operations%20to%20Make%20Array%20Equal/README.md) | `数学` | 中等 | | | [1552](https://leetcode-cn.com/problems/magnetic-force-between-two-balls) | [两球之间的磁力](/solution/1500-1599/1552.Magnetic%20Force%20Between%20Two%20Balls/README.md) | `数组`,`二分查找`,`排序` | 中等 | | | [1553](https://leetcode-cn.com/problems/minimum-number-of-days-to-eat-n-oranges) | [吃掉 N 个橘子的最少天数](/solution/1500-1599/1553.Minimum%20Number%20of%20Days%20to%20Eat%20N%20Oranges/README.md) | `记忆化搜索`,`动态规划` | 困难 | | | [1554](https://leetcode-cn.com/problems/strings-differ-by-one-character) | [只有一个不同字符的字符串](/solution/1500-1599/1554.Strings%20Differ%20by%20One%20Character/README.md) | `哈希表`,`字符串`,`哈希函数`,`滚动哈希` | 中等 | 🔒 | | [1555](https://leetcode-cn.com/problems/bank-account-summary) | [银行账户概要](/solution/1500-1599/1555.Bank%20Account%20Summary/README.md) | `数据库` | 中等 | 🔒 | | [1556](https://leetcode-cn.com/problems/thousand-separator) | [千位分隔数](/solution/1500-1599/1556.Thousand%20Separator/README.md) | `字符串` | 简单 | | | [1557](https://leetcode-cn.com/problems/minimum-number-of-vertices-to-reach-all-nodes) | [可以到达所有点的最少点数目](/solution/1500-1599/1557.Minimum%20Number%20of%20Vertices%20to%20Reach%20All%20Nodes/README.md) | `图` | 中等 | | | [1558](https://leetcode-cn.com/problems/minimum-numbers-of-function-calls-to-make-target-array) | [得到目标数组的最少函数调用次数](/solution/1500-1599/1558.Minimum%20Numbers%20of%20Function%20Calls%20to%20Make%20Target%20Array/README.md) | `贪心`,`数组` | 中等 | | | [1559](https://leetcode-cn.com/problems/detect-cycles-in-2d-grid) | [二维网格图中探测环](/solution/1500-1599/1559.Detect%20Cycles%20in%202D%20Grid/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`数组`,`矩阵` | 中等 | | | [1560](https://leetcode-cn.com/problems/most-visited-sector-in-a-circular-track) | [圆形赛道上经过次数最多的扇区](/solution/1500-1599/1560.Most%20Visited%20Sector%20in%20%20a%20Circular%20Track/README.md) | `数组`,`模拟` | 简单 | | | [1561](https://leetcode-cn.com/problems/maximum-number-of-coins-you-can-get) | [你可以获得的最大硬币数目](/solution/1500-1599/1561.Maximum%20Number%20of%20Coins%20You%20Can%20Get/README.md) | `贪心`,`数组`,`数学`,`博弈`,`排序` | 中等 | | | [1562](https://leetcode-cn.com/problems/find-latest-group-of-size-m) | [查找大小为 M 的最新分组](/solution/1500-1599/1562.Find%20Latest%20Group%20of%20Size%20M/README.md) | `数组`,`二分查找`,`模拟` | 中等 | | | [1563](https://leetcode-cn.com/problems/stone-game-v) | [石子游戏 V](/solution/1500-1599/1563.Stone%20Game%20V/README.md) | `数组`,`数学`,`动态规划`,`博弈` | 困难 | | | [1564](https://leetcode-cn.com/problems/put-boxes-into-the-warehouse-i) | [把箱子放进仓库里 I](/solution/1500-1599/1564.Put%20Boxes%20Into%20the%20Warehouse%20I/README.md) | `贪心`,`数组`,`排序` | 中等 | 🔒 | | [1565](https://leetcode-cn.com/problems/unique-orders-and-customers-per-month) | [按月统计订单数与顾客数](/solution/1500-1599/1565.Unique%20Orders%20and%20Customers%20Per%20Month/README.md) | `数据库` | 简单 | 🔒 | | [1566](https://leetcode-cn.com/problems/detect-pattern-of-length-m-repeated-k-or-more-times) | [重复至少 K 次且长度为 M 的模式](/solution/1500-1599/1566.Detect%20Pattern%20of%20Length%20M%20Repeated%20K%20or%20More%20Times/README.md) | `数组`,`枚举` | 简单 | | | [1567](https://leetcode-cn.com/problems/maximum-length-of-subarray-with-positive-product) | [乘积为正数的最长子数组长度](/solution/1500-1599/1567.Maximum%20Length%20of%20Subarray%20With%20Positive%20Product/README.md) | `贪心`,`数组`,`动态规划` | 中等 | | | [1568](https://leetcode-cn.com/problems/minimum-number-of-days-to-disconnect-island) | [使陆地分离的最少天数](/solution/1500-1599/1568.Minimum%20Number%20of%20Days%20to%20Disconnect%20Island/README.md) | `深度优先搜索`,`广度优先搜索`,`数组`,`矩阵`,`强连通分量` | 困难 | | | [1569](https://leetcode-cn.com/problems/number-of-ways-to-reorder-array-to-get-same-bst) | [将子数组重新排序得到同一个二叉查找树的方案数](/solution/1500-1599/1569.Number%20of%20Ways%20to%20Reorder%20Array%20to%20Get%20Same%20BST/README.md) | `树`,`并查集`,`二叉搜索树`,`记忆化搜索`,`数组`,`数学`,`分治`,`动态规划`,`二叉树`,`组合数学` | 困难 | | | [1570](https://leetcode-cn.com/problems/dot-product-of-two-sparse-vectors) | [两个稀疏向量的点积](/solution/1500-1599/1570.Dot%20Product%20of%20Two%20Sparse%20Vectors/README.md) | `设计`,`数组`,`哈希表`,`双指针` | 中等 | 🔒 | | [1571](https://leetcode-cn.com/problems/warehouse-manager) | [仓库经理](/solution/1500-1599/1571.Warehouse%20Manager/README.md) | `数据库` | 简单 | 🔒 | | [1572](https://leetcode-cn.com/problems/matrix-diagonal-sum) | [矩阵对角线元素的和](/solution/1500-1599/1572.Matrix%20Diagonal%20Sum/README.md) | `数组`,`矩阵` | 简单 | | | [1573](https://leetcode-cn.com/problems/number-of-ways-to-split-a-string) | [分割字符串的方案数](/solution/1500-1599/1573.Number%20of%20Ways%20to%20Split%20a%20String/README.md) | `数学`,`字符串` | 中等 | | | [1574](https://leetcode-cn.com/problems/shortest-subarray-to-be-removed-to-make-array-sorted) | [删除最短的子数组使剩余数组有序](/solution/1500-1599/1574.Shortest%20Subarray%20to%20be%20Removed%20to%20Make%20Array%20Sorted/README.md) | `栈`,`数组`,`双指针`,`二分查找`,`单调栈` | 中等 | | | [1575](https://leetcode-cn.com/problems/count-all-possible-routes) | [统计所有可行路径](/solution/1500-1599/1575.Count%20All%20Possible%20Routes/README.md) | `记忆化搜索`,`数组`,`动态规划` | 困难 | | | [1576](https://leetcode-cn.com/problems/replace-all-s-to-avoid-consecutive-repeating-characters) | [替换所有的问号](/solution/1500-1599/1576.Replace%20All%20%27s%20to%20Avoid%20Consecutive%20Repeating%20Characters/README.md) | `字符串` | 简单 | | | [1577](https://leetcode-cn.com/problems/number-of-ways-where-square-of-number-is-equal-to-product-of-two-numbers) | [数的平方等于两数乘积的方法数](/solution/1500-1599/1577.Number%20of%20Ways%20Where%20Square%20of%20Number%20Is%20Equal%20to%20Product%20of%20Two%20Numbers/README.md) | `数组`,`哈希表`,`数学`,`双指针` | 中等 | | | [1578](https://leetcode-cn.com/problems/minimum-time-to-make-rope-colorful) | [使绳子变成彩色的最短时间](/solution/1500-1599/1578.Minimum%20Time%20to%20Make%20Rope%20Colorful/README.md) | `贪心`,`数组`,`字符串`,`动态规划` | 中等 | | | [1579](https://leetcode-cn.com/problems/remove-max-number-of-edges-to-keep-graph-fully-traversable) | [保证图可完全遍历](/solution/1500-1599/1579.Remove%20Max%20Number%20of%20Edges%20to%20Keep%20Graph%20Fully%20Traversable/README.md) | `并查集`,`图` | 困难 | | | [1580](https://leetcode-cn.com/problems/put-boxes-into-the-warehouse-ii) | [把箱子放进仓库里 II](/solution/1500-1599/1580.Put%20Boxes%20Into%20the%20Warehouse%20II/README.md) | `贪心`,`数组`,`排序` | 中等 | 🔒 | | [1581](https://leetcode-cn.com/problems/customer-who-visited-but-did-not-make-any-transactions) | [进店却未进行过交易的顾客](/solution/1500-1599/1581.Customer%20Who%20Visited%20but%20Did%20Not%20Make%20Any%20Transactions/README.md) | `数据库` | 简单 | | | [1582](https://leetcode-cn.com/problems/special-positions-in-a-binary-matrix) | [二进制矩阵中的特殊位置](/solution/1500-1599/1582.Special%20Positions%20in%20a%20Binary%20Matrix/README.md) | `数组`,`矩阵` | 简单 | | | [1583](https://leetcode-cn.com/problems/count-unhappy-friends) | [统计不开心的朋友](/solution/1500-1599/1583.Count%20Unhappy%20Friends/README.md) | `数组`,`模拟` | 中等 | | | [1584](https://leetcode-cn.com/problems/min-cost-to-connect-all-points) | [连接所有点的最小费用](/solution/1500-1599/1584.Min%20Cost%20to%20Connect%20All%20Points/README.md) | `并查集`,`数组`,`最小生成树` | 中等 | | | [1585](https://leetcode-cn.com/problems/check-if-string-is-transformable-with-substring-sort-operations) | [检查字符串是否可以通过排序子字符串得到另一个字符串](/solution/1500-1599/1585.Check%20If%20String%20Is%20Transformable%20With%20Substring%20Sort%20Operations/README.md) | `贪心`,`字符串`,`排序` | 困难 | | | [1586](https://leetcode-cn.com/problems/binary-search-tree-iterator-ii) | [二叉搜索树迭代器 II](/solution/1500-1599/1586.Binary%20Search%20Tree%20Iterator%20II/README.md) | `栈`,`树`,`设计`,`二叉搜索树`,`二叉树`,`迭代器` | 中等 | 🔒 | | [1587](https://leetcode-cn.com/problems/bank-account-summary-ii) | [银行账户概要 II](/solution/1500-1599/1587.Bank%20Account%20Summary%20II/README.md) | `数据库` | 简单 | | | [1588](https://leetcode-cn.com/problems/sum-of-all-odd-length-subarrays) | [所有奇数长度子数组的和](/solution/1500-1599/1588.Sum%20of%20All%20Odd%20Length%20Subarrays/README.md) | `数组`,`数学`,`前缀和` | 简单 | | | [1589](https://leetcode-cn.com/problems/maximum-sum-obtained-of-any-permutation) | [所有排列中的最大和](/solution/1500-1599/1589.Maximum%20Sum%20Obtained%20of%20Any%20Permutation/README.md) | `贪心`,`数组`,`前缀和`,`排序` | 中等 | | | [1590](https://leetcode-cn.com/problems/make-sum-divisible-by-p) | [使数组和能被 P 整除](/solution/1500-1599/1590.Make%20Sum%20Divisible%20by%20P/README.md) | `数组`,`哈希表`,`前缀和` | 中等 | | | [1591](https://leetcode-cn.com/problems/strange-printer-ii) | [奇怪的打印机 II](/solution/1500-1599/1591.Strange%20Printer%20II/README.md) | `图`,`拓扑排序`,`数组`,`矩阵` | 困难 | | | [1592](https://leetcode-cn.com/problems/rearrange-spaces-between-words) | [重新排列单词间的空格](/solution/1500-1599/1592.Rearrange%20Spaces%20Between%20Words/README.md) | `字符串` | 简单 | | | [1593](https://leetcode-cn.com/problems/split-a-string-into-the-max-number-of-unique-substrings) | [拆分字符串使唯一子字符串的数目最大](/solution/1500-1599/1593.Split%20a%20String%20Into%20the%20Max%20Number%20of%20Unique%20Substrings/README.md) | `哈希表`,`字符串`,`回溯` | 中等 | | | [1594](https://leetcode-cn.com/problems/maximum-non-negative-product-in-a-matrix) | [矩阵的最大非负积](/solution/1500-1599/1594.Maximum%20Non%20Negative%20Product%20in%20a%20Matrix/README.md) | `数组`,`动态规划`,`矩阵` | 中等 | | | [1595](https://leetcode-cn.com/problems/minimum-cost-to-connect-two-groups-of-points) | [连通两组点的最小成本](/solution/1500-1599/1595.Minimum%20Cost%20to%20Connect%20Two%20Groups%20of%20Points/README.md) | `位运算`,`数组`,`动态规划`,`状态压缩`,`矩阵` | 困难 | | | [1596](https://leetcode-cn.com/problems/the-most-frequently-ordered-products-for-each-customer) | [每位顾客最经常订购的商品](/solution/1500-1599/1596.The%20Most%20Frequently%20Ordered%20Products%20for%20Each%20Customer/README.md) | `数据库` | 中等 | 🔒 | | [1597](https://leetcode-cn.com/problems/build-binary-expression-tree-from-infix-expression) | [根据中缀表达式构造二叉表达式树](/solution/1500-1599/1597.Build%20Binary%20Expression%20Tree%20From%20Infix%20Expression/README.md) | `栈`,`树`,`字符串`,`二叉树` | 困难 | 🔒 | | [1598](https://leetcode-cn.com/problems/crawler-log-folder) | [文件夹操作日志搜集器](/solution/1500-1599/1598.Crawler%20Log%20Folder/README.md) | `栈`,`数组`,`字符串` | 简单 | | | [1599](https://leetcode-cn.com/problems/maximum-profit-of-operating-a-centennial-wheel) | [经营摩天轮的最大利润](/solution/1500-1599/1599.Maximum%20Profit%20of%20Operating%20a%20Centennial%20Wheel/README.md) | `数组`,`模拟` | 中等 | | | [1600](https://leetcode-cn.com/problems/throne-inheritance) | [王位继承顺序](/solution/1600-1699/1600.Throne%20Inheritance/README.md) | `树`,`深度优先搜索`,`设计`,`哈希表` | 中等 | | | [1601](https://leetcode-cn.com/problems/maximum-number-of-achievable-transfer-requests) | [最多可达成的换楼请求数目](/solution/1600-1699/1601.Maximum%20Number%20of%20Achievable%20Transfer%20Requests/README.md) | `位运算`,`数组`,`回溯`,`枚举` | 困难 | | | [1602](https://leetcode-cn.com/problems/find-nearest-right-node-in-binary-tree) | [找到二叉树中最近的右侧节点](/solution/1600-1699/1602.Find%20Nearest%20Right%20Node%20in%20Binary%20Tree/README.md) | `树`,`广度优先搜索`,`二叉树` | 中等 | 🔒 | | [1603](https://leetcode-cn.com/problems/design-parking-system) | [设计停车系统](/solution/1600-1699/1603.Design%20Parking%20System/README.md) | `设计`,`计数`,`模拟` | 简单 | | | [1604](https://leetcode-cn.com/problems/alert-using-same-key-card-three-or-more-times-in-a-one-hour-period) | [警告一小时内使用相同员工卡大于等于三次的人](/solution/1600-1699/1604.Alert%20Using%20Same%20Key-Card%20Three%20or%20More%20Times%20in%20a%20One%20Hour%20Period/README.md) | `数组`,`哈希表`,`字符串`,`排序` | 中等 | | | [1605](https://leetcode-cn.com/problems/find-valid-matrix-given-row-and-column-sums) | [给定行和列的和求可行矩阵](/solution/1600-1699/1605.Find%20Valid%20Matrix%20Given%20Row%20and%20Column%20Sums/README.md) | `贪心`,`数组`,`矩阵` | 中等 | | | [1606](https://leetcode-cn.com/problems/find-servers-that-handled-most-number-of-requests) | [找到处理最多请求的服务器](/solution/1600-1699/1606.Find%20Servers%20That%20Handled%20Most%20Number%20of%20Requests/README.md) | `贪心`,`数组`,`有序集合`,`堆（优先队列）` | 困难 | | | [1607](https://leetcode-cn.com/problems/sellers-with-no-sales) | [没有卖出的卖家](/solution/1600-1699/1607.Sellers%20With%20No%20Sales/README.md) | `数据库` | 简单 | 🔒 | | [1608](https://leetcode-cn.com/problems/special-array-with-x-elements-greater-than-or-equal-x) | [特殊数组的特征值](/solution/1600-1699/1608.Special%20Array%20With%20X%20Elements%20Greater%20Than%20or%20Equal%20X/README.md) | `数组`,`二分查找`,`排序` | 简单 | | | [1609](https://leetcode-cn.com/problems/even-odd-tree) | [奇偶树](/solution/1600-1699/1609.Even%20Odd%20Tree/README.md) | `树`,`广度优先搜索`,`二叉树` | 中等 | | | [1610](https://leetcode-cn.com/problems/maximum-number-of-visible-points) | [可见点的最大数目](/solution/1600-1699/1610.Maximum%20Number%20of%20Visible%20Points/README.md) | `几何`,`数组`,`数学`,`排序`,`滑动窗口` | 困难 | | | [1611](https://leetcode-cn.com/problems/minimum-one-bit-operations-to-make-integers-zero) | [使整数变为 0 的最少操作次数](/solution/1600-1699/1611.Minimum%20One%20Bit%20Operations%20to%20Make%20Integers%20Zero/README.md) | `位运算`,`记忆化搜索`,`动态规划` | 困难 | | | [1612](https://leetcode-cn.com/problems/check-if-two-expression-trees-are-equivalent) | [检查两棵二叉表达式树是否等价](/solution/1600-1699/1612.Check%20If%20Two%20Expression%20Trees%20are%20Equivalent/README.md) | `树`,`深度优先搜索`,`二叉树` | 中等 | 🔒 | | [1613](https://leetcode-cn.com/problems/find-the-missing-ids) | [找到遗失的 ID](/solution/1600-1699/1613.Find%20the%20Missing%20IDs/README.md) | `数据库` | 中等 | 🔒 | | [1614](https://leetcode-cn.com/problems/maximum-nesting-depth-of-the-parentheses) | [括号的最大嵌套深度](/solution/1600-1699/1614.Maximum%20Nesting%20Depth%20of%20the%20Parentheses/README.md) | `栈`,`字符串` | 简单 | | | [1615](https://leetcode-cn.com/problems/maximal-network-rank) | [最大网络秩](/solution/1600-1699/1615.Maximal%20Network%20Rank/README.md) | `图` | 中等 | | | [1616](https://leetcode-cn.com/problems/split-two-strings-to-make-palindrome) | [分割两个字符串得到回文串](/solution/1600-1699/1616.Split%20Two%20Strings%20to%20Make%20Palindrome/README.md) | `贪心`,`双指针`,`字符串` | 中等 | | | [1617](https://leetcode-cn.com/problems/count-subtrees-with-max-distance-between-cities) | [统计子树中城市之间最大距离](/solution/1600-1699/1617.Count%20Subtrees%20With%20Max%20Distance%20Between%20Cities/README.md) | `位运算`,`树`,`动态规划`,`状态压缩`,`枚举` | 困难 | | | [1618](https://leetcode-cn.com/problems/maximum-font-to-fit-a-sentence-in-a-screen) | [找出适应屏幕的最大字号](/solution/1600-1699/1618.Maximum%20Font%20to%20Fit%20a%20Sentence%20in%20a%20Screen/README.md) | `数组`,`字符串`,`二分查找`,`交互` | 中等 | 🔒 | | [1619](https://leetcode-cn.com/problems/mean-of-array-after-removing-some-elements) | [删除某些元素后的数组均值](/solution/1600-1699/1619.Mean%20of%20Array%20After%20Removing%20Some%20Elements/README.md) | `数组`,`排序` | 简单 | | | [1620](https://leetcode-cn.com/problems/coordinate-with-maximum-network-quality) | [网络信号最好的坐标](/solution/1600-1699/1620.Coordinate%20With%20Maximum%20Network%20Quality/README.md) | `数组`,`枚举` | 中等 | | | [1621](https://leetcode-cn.com/problems/number-of-sets-of-k-non-overlapping-line-segments) | [大小为 K 的不重叠线段的数目](/solution/1600-1699/1621.Number%20of%20Sets%20of%20K%20Non-Overlapping%20Line%20Segments/README.md) | `数学`,`动态规划` | 中等 | | | [1622](https://leetcode-cn.com/problems/fancy-sequence) | [奇妙序列](/solution/1600-1699/1622.Fancy%20Sequence/README.md) | `设计`,`线段树`,`数学` | 困难 | | | [1623](https://leetcode-cn.com/problems/all-valid-triplets-that-can-represent-a-country) | [三人国家代表队](/solution/1600-1699/1623.All%20Valid%20Triplets%20That%20Can%20Represent%20a%20Country/README.md) | `数据库` | 简单 | 🔒 | | [1624](https://leetcode-cn.com/problems/largest-substring-between-two-equal-characters) | [两个相同字符之间的最长子字符串](/solution/1600-1699/1624.Largest%20Substring%20Between%20Two%20Equal%20Characters/README.md) | `哈希表`,`字符串` | 简单 | | | [1625](https://leetcode-cn.com/problems/lexicographically-smallest-string-after-applying-operations) | [执行操作后字典序最小的字符串](/solution/1600-1699/1625.Lexicographically%20Smallest%20String%20After%20Applying%20Operations/README.md) | `广度优先搜索`,`字符串` | 中等 | | | [1626](https://leetcode-cn.com/problems/best-team-with-no-conflicts) | [无矛盾的最佳球队](/solution/1600-1699/1626.Best%20Team%20With%20No%20Conflicts/README.md) | `数组`,`动态规划`,`排序` | 中等 | | | [1627](https://leetcode-cn.com/problems/graph-connectivity-with-threshold) | [带阈值的图连通性](/solution/1600-1699/1627.Graph%20Connectivity%20With%20Threshold/README.md) | `并查集`,`数组`,`数学` | 困难 | | | [1628](https://leetcode-cn.com/problems/design-an-expression-tree-with-evaluate-function) | [设计带解析函数的表达式树](/solution/1600-1699/1628.Design%20an%20Expression%20Tree%20With%20Evaluate%20Function/README.md) | `栈`,`树`,`设计`,`数学`,`二叉树` | 中等 | 🔒 | | [1629](https://leetcode-cn.com/problems/slowest-key) | [按键持续时间最长的键](/solution/1600-1699/1629.Slowest%20Key/README.md) | `数组`,`字符串` | 简单 | | | [1630](https://leetcode-cn.com/problems/arithmetic-subarrays) | [等差子数组](/solution/1600-1699/1630.Arithmetic%20Subarrays/README.md) | `数组`,`排序` | 中等 | | | [1631](https://leetcode-cn.com/problems/path-with-minimum-effort) | [最小体力消耗路径](/solution/1600-1699/1631.Path%20With%20Minimum%20Effort/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`数组`,`二分查找`,`矩阵`,`堆（优先队列）` | 中等 | | | [1632](https://leetcode-cn.com/problems/rank-transform-of-a-matrix) | [矩阵转换后的秩](/solution/1600-1699/1632.Rank%20Transform%20of%20a%20Matrix/README.md) | `贪心`,`并查集`,`图`,`拓扑排序`,`数组`,`矩阵` | 困难 | | | [1633](https://leetcode-cn.com/problems/percentage-of-users-attended-a-contest) | [各赛事的用户注册率](/solution/1600-1699/1633.Percentage%20of%20Users%20Attended%20a%20Contest/README.md) | `数据库` | 简单 | 🔒 | | [1634](https://leetcode-cn.com/problems/add-two-polynomials-represented-as-linked-lists) | [求两个多项式链表的和](/solution/1600-1699/1634.Add%20Two%20Polynomials%20Represented%20as%20Linked%20Lists/README.md) | `链表`,`数学`,`双指针` | 中等 | 🔒 | | [1635](https://leetcode-cn.com/problems/hopper-company-queries-i) | [Hopper 公司查询 I](/solution/1600-1699/1635.Hopper%20Company%20Queries%20I/README.md) | `数据库` | 困难 | 🔒 | | [1636](https://leetcode-cn.com/problems/sort-array-by-increasing-frequency) | [按照频率将数组升序排序](/solution/1600-1699/1636.Sort%20Array%20by%20Increasing%20Frequency/README.md) | `数组`,`哈希表`,`排序` | 简单 | | | [1637](https://leetcode-cn.com/problems/widest-vertical-area-between-two-points-containing-no-points) | [两点之间不包含任何点的最宽垂直面积](/solution/1600-1699/1637.Widest%20Vertical%20Area%20Between%20Two%20Points%20Containing%20No%20Points/README.md) | `数组`,`排序` | 中等 | | | [1638](https://leetcode-cn.com/problems/count-substrings-that-differ-by-one-character) | [统计只差一个字符的子串数目](/solution/1600-1699/1638.Count%20Substrings%20That%20Differ%20by%20One%20Character/README.md) | `哈希表`,`字符串`,`动态规划` | 中等 | | | [1639](https://leetcode-cn.com/problems/number-of-ways-to-form-a-target-string-given-a-dictionary) | [通过给定词典构造目标字符串的方案数](/solution/1600-1699/1639.Number%20of%20Ways%20to%20Form%20a%20Target%20String%20Given%20a%20Dictionary/README.md) | `数组`,`字符串`,`动态规划` | 困难 | | | [1640](https://leetcode-cn.com/problems/check-array-formation-through-concatenation) | [能否连接形成数组](/solution/1600-1699/1640.Check%20Array%20Formation%20Through%20Concatenation/README.md) | `数组`,`哈希表` | 简单 | | | [1641](https://leetcode-cn.com/problems/count-sorted-vowel-strings) | [统计字典序元音字符串的数目](/solution/1600-1699/1641.Count%20Sorted%20Vowel%20Strings/README.md) | `动态规划` | 中等 | | | [1642](https://leetcode-cn.com/problems/furthest-building-you-can-reach) | [可以到达的最远建筑](/solution/1600-1699/1642.Furthest%20Building%20You%20Can%20Reach/README.md) | `贪心`,`数组`,`堆（优先队列）` | 中等 | | | [1643](https://leetcode-cn.com/problems/kth-smallest-instructions) | [第 K 条最小指令](/solution/1600-1699/1643.Kth%20Smallest%20Instructions/README.md) | `数组`,`数学`,`动态规划`,`组合数学` | 困难 | | | [1644](https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-tree-ii) | [二叉树的最近公共祖先 II](/solution/1600-1699/1644.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20II/README.md) | `树`,`深度优先搜索`,`二叉树` | 中等 | 🔒 | | [1645](https://leetcode-cn.com/problems/hopper-company-queries-ii) | [Hopper Company Queries II](/solution/1600-1699/1645.Hopper%20Company%20Queries%20II/README.md) | `数据库` | 困难 | 🔒 | | [1646](https://leetcode-cn.com/problems/get-maximum-in-generated-array) | [获取生成数组中的最大值](/solution/1600-1699/1646.Get%20Maximum%20in%20Generated%20Array/README.md) | `数组`,`动态规划`,`模拟` | 简单 | | | [1647](https://leetcode-cn.com/problems/minimum-deletions-to-make-character-frequencies-unique) | [字符频次唯一的最小删除次数](/solution/1600-1699/1647.Minimum%20Deletions%20to%20Make%20Character%20Frequencies%20Unique/README.md) | `贪心`,`字符串`,`排序` | 中等 | | | [1648](https://leetcode-cn.com/problems/sell-diminishing-valued-colored-balls) | [销售价值减少的颜色球](/solution/1600-1699/1648.Sell%20Diminishing-Valued%20Colored%20Balls/README.md) | `贪心`,`数组`,`数学`,`二分查找`,`排序`,`堆（优先队列）` | 中等 | | | [1649](https://leetcode-cn.com/problems/create-sorted-array-through-instructions) | [通过指令创建有序数组](/solution/1600-1699/1649.Create%20Sorted%20Array%20through%20Instructions/README.md) | `树状数组`,`线段树`,`数组`,`二分查找`,`分治`,`有序集合`,`归并排序` | 困难 | | | [1650](https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-tree-iii) | [二叉树的最近公共祖先 III](/solution/1600-1699/1650.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20III/README.md) | `树`,`哈希表`,`二叉树` | 中等 | 🔒 | | [1651](https://leetcode-cn.com/problems/hopper-company-queries-iii) | [Hopper 公司查询 III](/solution/1600-1699/1651.Hopper%20Company%20Queries%20III/README.md) | `数据库` | 困难 | 🔒 | | [1652](https://leetcode-cn.com/problems/defuse-the-bomb) | [拆炸弹](/solution/1600-1699/1652.Defuse%20the%20Bomb/README.md) | `数组` | 简单 | | | [1653](https://leetcode-cn.com/problems/minimum-deletions-to-make-string-balanced) | [使字符串平衡的最少删除次数](/solution/1600-1699/1653.Minimum%20Deletions%20to%20Make%20String%20Balanced/README.md) | `栈`,`字符串`,`动态规划` | 中等 | | | [1654](https://leetcode-cn.com/problems/minimum-jumps-to-reach-home) | [到家的最少跳跃次数](/solution/1600-1699/1654.Minimum%20Jumps%20to%20Reach%20Home/README.md) | `广度优先搜索`,`数组`,`动态规划` | 中等 | | | [1655](https://leetcode-cn.com/problems/distribute-repeating-integers) | [分配重复整数](/solution/1600-1699/1655.Distribute%20Repeating%20Integers/README.md) | `位运算`,`数组`,`动态规划`,`回溯`,`状态压缩` | 困难 | | | [1656](https://leetcode-cn.com/problems/design-an-ordered-stream) | [设计有序流](/solution/1600-1699/1656.Design%20an%20Ordered%20Stream/README.md) | `设计`,`数组`,`哈希表`,`数据流` | 简单 | | | [1657](https://leetcode-cn.com/problems/determine-if-two-strings-are-close) | [确定两个字符串是否接近](/solution/1600-1699/1657.Determine%20if%20Two%20Strings%20Are%20Close/README.md) | `哈希表`,`字符串`,`排序` | 中等 | | | [1658](https://leetcode-cn.com/problems/minimum-operations-to-reduce-x-to-zero) | [将 x 减到 0 的最小操作数](/solution/1600-1699/1658.Minimum%20Operations%20to%20Reduce%20X%20to%20Zero/README.md) | `数组`,`哈希表`,`二分查找`,`前缀和`,`滑动窗口` | 中等 | | | [1659](https://leetcode-cn.com/problems/maximize-grid-happiness) | [最大化网格幸福感](/solution/1600-1699/1659.Maximize%20Grid%20Happiness/README.md) | `位运算`,`记忆化搜索`,`动态规划`,`状态压缩` | 困难 | | | [1660](https://leetcode-cn.com/problems/correct-a-binary-tree) | [纠正二叉树](/solution/1600-1699/1660.Correct%20a%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`哈希表`,`二叉树` | 中等 | 🔒 | | [1661](https://leetcode-cn.com/problems/average-time-of-process-per-machine) | [每台机器的进程平均运行时间](/solution/1600-1699/1661.Average%20Time%20of%20Process%20per%20Machine/README.md) | `数据库` | 简单 | 🔒 | | [1662](https://leetcode-cn.com/problems/check-if-two-string-arrays-are-equivalent) | [检查两个字符串数组是否相等](/solution/1600-1699/1662.Check%20If%20Two%20String%20Arrays%20are%20Equivalent/README.md) | `数组`,`字符串` | 简单 | | | [1663](https://leetcode-cn.com/problems/smallest-string-with-a-given-numeric-value) | [具有给定数值的最小字符串](/solution/1600-1699/1663.Smallest%20String%20With%20A%20Given%20Numeric%20Value/README.md) | `贪心`,`字符串` | 中等 | | | [1664](https://leetcode-cn.com/problems/ways-to-make-a-fair-array) | [生成平衡数组的方案数](/solution/1600-1699/1664.Ways%20to%20Make%20a%20Fair%20Array/README.md) | `数组`,`动态规划` | 中等 | | | [1665](https://leetcode-cn.com/problems/minimum-initial-energy-to-finish-tasks) | [完成所有任务的最少初始能量](/solution/1600-1699/1665.Minimum%20Initial%20Energy%20to%20Finish%20Tasks/README.md) | `贪心`,`数组`,`排序` | 困难 | | | [1666](https://leetcode-cn.com/problems/change-the-root-of-a-binary-tree) | [改变二叉树的根节点](/solution/1600-1699/1666.Change%20the%20Root%20of%20a%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`二叉树` | 中等 | 🔒 | | [1667](https://leetcode-cn.com/problems/fix-names-in-a-table) | [修复表中的名字](/solution/1600-1699/1667.Fix%20Names%20in%20a%20Table/README.md) | `数据库` | 简单 | | | [1668](https://leetcode-cn.com/problems/maximum-repeating-substring) | [最大重复子字符串](/solution/1600-1699/1668.Maximum%20Repeating%20Substring/README.md) | `字符串`,`字符串匹配` | 简单 | | | [1669](https://leetcode-cn.com/problems/merge-in-between-linked-lists) | [合并两个链表](/solution/1600-1699/1669.Merge%20In%20Between%20Linked%20Lists/README.md) | `链表` | 中等 | | | [1670](https://leetcode-cn.com/problems/design-front-middle-back-queue) | [设计前中后队列](/solution/1600-1699/1670.Design%20Front%20Middle%20Back%20Queue/README.md) | `设计`,`队列`,`数组`,`链表`,`数据流` | 中等 | | | [1671](https://leetcode-cn.com/problems/minimum-number-of-removals-to-make-mountain-array) | [得到山形数组的最少删除次数](/solution/1600-1699/1671.Minimum%20Number%20of%20Removals%20to%20Make%20Mountain%20Array/README.md) | `贪心`,`数组`,`二分查找`,`动态规划` | 困难 | | | [1672](https://leetcode-cn.com/problems/richest-customer-wealth) | [最富有客户的资产总量](/solution/1600-1699/1672.Richest%20Customer%20Wealth/README.md) | `数组`,`矩阵` | 简单 | | | [1673](https://leetcode-cn.com/problems/find-the-most-competitive-subsequence) | [找出最具竞争力的子序列](/solution/1600-1699/1673.Find%20the%20Most%20Competitive%20Subsequence/README.md) | `栈`,`贪心`,`数组`,`单调栈` | 中等 | | | [1674](https://leetcode-cn.com/problems/minimum-moves-to-make-array-complementary) | [使数组互补的最少操作次数](/solution/1600-1699/1674.Minimum%20Moves%20to%20Make%20Array%20Complementary/README.md) | `数组`,`哈希表`,`前缀和` | 中等 | | | [1675](https://leetcode-cn.com/problems/minimize-deviation-in-array) | [数组的最小偏移量](/solution/1600-1699/1675.Minimize%20Deviation%20in%20Array/README.md) | `贪心`,`数组`,`有序集合`,`堆（优先队列）` | 困难 | | | [1676](https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-tree-iv) | [二叉树的最近公共祖先 IV](/solution/1600-1699/1676.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20IV/README.md) | `树`,`深度优先搜索`,`二叉树` | 中等 | 🔒 | | [1677](https://leetcode-cn.com/problems/products-worth-over-invoices) | [发票中的产品金额](/solution/1600-1699/1677.Product%27s%20Worth%20Over%20Invoices/README.md) | `数据库` | 简单 | 🔒 | | [1678](https://leetcode-cn.com/problems/goal-parser-interpretation) | [设计 Goal 解析器](/solution/1600-1699/1678.Goal%20Parser%20Interpretation/README.md) | `字符串` | 简单 | | | [1679](https://leetcode-cn.com/problems/max-number-of-k-sum-pairs) | [K 和数对的最大数目](/solution/1600-1699/1679.Max%20Number%20of%20K-Sum%20Pairs/README.md) | `数组`,`哈希表`,`双指针`,`排序` | 中等 | | | [1680](https://leetcode-cn.com/problems/concatenation-of-consecutive-binary-numbers) | [连接连续二进制数字](/solution/1600-1699/1680.Concatenation%20of%20Consecutive%20Binary%20Numbers/README.md) | `位运算`,`数学`,`模拟` | 中等 | | | [1681](https://leetcode-cn.com/problems/minimum-incompatibility) | [最小不兼容性](/solution/1600-1699/1681.Minimum%20Incompatibility/README.md) | `位运算`,`数组`,`动态规划`,`状态压缩` | 困难 | | | [1682](https://leetcode-cn.com/problems/longest-palindromic-subsequence-ii) | [最长回文子序列 II](/solution/1600-1699/1682.Longest%20Palindromic%20Subsequence%20II/README.md) | `字符串`,`动态规划` | 中等 | 🔒 | | [1683](https://leetcode-cn.com/problems/invalid-tweets) | [无效的推文](/solution/1600-1699/1683.Invalid%20Tweets/README.md) | `数据库` | 简单 | 🔒 | | [1684](https://leetcode-cn.com/problems/count-the-number-of-consistent-strings) | [统计一致字符串的数目](/solution/1600-1699/1684.Count%20the%20Number%20of%20Consistent%20Strings/README.md) | `位运算`,`数组`,`哈希表`,`字符串` | 简单 | | | [1685](https://leetcode-cn.com/problems/sum-of-absolute-differences-in-a-sorted-array) | [有序数组中差绝对值之和](/solution/1600-1699/1685.Sum%20of%20Absolute%20Differences%20in%20a%20Sorted%20Array/README.md) | `数组`,`数学`,`前缀和` | 中等 | | | [1686](https://leetcode-cn.com/problems/stone-game-vi) | [石子游戏 VI](/solution/1600-1699/1686.Stone%20Game%20VI/README.md) | `贪心`,`数组`,`数学`,`博弈`,`排序`,`堆（优先队列）` | 中等 | | | [1687](https://leetcode-cn.com/problems/delivering-boxes-from-storage-to-ports) | [从仓库到码头运输箱子](/solution/1600-1699/1687.Delivering%20Boxes%20from%20Storage%20to%20Ports/README.md) | `线段树`,`队列`,`数组`,`动态规划`,`单调队列`,`堆（优先队列）` | 困难 | | | [1688](https://leetcode-cn.com/problems/count-of-matches-in-tournament) | [比赛中的配对次数](/solution/1600-1699/1688.Count%20of%20Matches%20in%20Tournament/README.md) | `数学`,`模拟` | 简单 | | | [1689](https://leetcode-cn.com/problems/partitioning-into-minimum-number-of-deci-binary-numbers) | [十-二进制数的最少数目](/solution/1600-1699/1689.Partitioning%20Into%20Minimum%20Number%20Of%20Deci-Binary%20Numbers/README.md) | `贪心`,`字符串` | 中等 | | | [1690](https://leetcode-cn.com/problems/stone-game-vii) | [石子游戏 VII](/solution/1600-1699/1690.Stone%20Game%20VII/README.md) | `数组`,`数学`,`动态规划`,`博弈` | 中等 | | | [1691](https://leetcode-cn.com/problems/maximum-height-by-stacking-cuboids) | [堆叠长方体的最大高度](/solution/1600-1699/1691.Maximum%20Height%20by%20Stacking%20Cuboids/README.md) | `数组`,`动态规划`,`排序` | 困难 | | | [1692](https://leetcode-cn.com/problems/count-ways-to-distribute-candies) | [计算分配糖果的不同方式](/solution/1600-1699/1692.Count%20Ways%20to%20Distribute%20Candies/README.md) | `动态规划` | 困难 | 🔒 | | [1693](https://leetcode-cn.com/problems/daily-leads-and-partners) | [每天的领导和合伙人](/solution/1600-1699/1693.Daily%20Leads%20and%20Partners/README.md) | `数据库` | 简单 | | | [1694](https://leetcode-cn.com/problems/reformat-phone-number) | [重新格式化电话号码](/solution/1600-1699/1694.Reformat%20Phone%20Number/README.md) | `字符串` | 简单 | | | [1695](https://leetcode-cn.com/problems/maximum-erasure-value) | [删除子数组的最大得分](/solution/1600-1699/1695.Maximum%20Erasure%20Value/README.md) | `数组`,`哈希表`,`滑动窗口` | 中等 | | | [1696](https://leetcode-cn.com/problems/jump-game-vi) | [跳跃游戏 VI](/solution/1600-1699/1696.Jump%20Game%20VI/README.md) | `队列`,`数组`,`动态规划`,`滑动窗口`,`单调队列`,`堆（优先队列）` | 中等 | | | [1697](https://leetcode-cn.com/problems/checking-existence-of-edge-length-limited-paths) | [检查边长度限制的路径是否存在](/solution/1600-1699/1697.Checking%20Existence%20of%20Edge%20Length%20Limited%20Paths/README.md) | `并查集`,`图`,`数组`,`排序` | 困难 | | | [1698](https://leetcode-cn.com/problems/number-of-distinct-substrings-in-a-string) | [字符串的不同子字符串个数](/solution/1600-1699/1698.Number%20of%20Distinct%20Substrings%20in%20a%20String/README.md) | `字典树`,`字符串`,`后缀数组`,`哈希函数`,`滚动哈希` | 中等 | 🔒 | | [1699](https://leetcode-cn.com/problems/number-of-calls-between-two-persons) | [两人之间的通话次数](/solution/1600-1699/1699.Number%20of%20Calls%20Between%20Two%20Persons/README.md) | `数据库` | 中等 | 🔒 | | [1700](https://leetcode-cn.com/problems/number-of-students-unable-to-eat-lunch) | [无法吃午餐的学生数量](/solution/1700-1799/1700.Number%20of%20Students%20Unable%20to%20Eat%20Lunch/README.md) | `栈`,`队列`,`数组`,`模拟` | 简单 | | | [1701](https://leetcode-cn.com/problems/average-waiting-time) | [平均等待时间](/solution/1700-1799/1701.Average%20Waiting%20Time/README.md) | `数组`,`模拟` | 中等 | | | [1702](https://leetcode-cn.com/problems/maximum-binary-string-after-change) | [修改后的最大二进制字符串](/solution/1700-1799/1702.Maximum%20Binary%20String%20After%20Change/README.md) | `贪心`,`字符串` | 中等 | | | [1703](https://leetcode-cn.com/problems/minimum-adjacent-swaps-for-k-consecutive-ones) | [得到连续 K 个 1 的最少相邻交换次数](/solution/1700-1799/1703.Minimum%20Adjacent%20Swaps%20for%20K%20Consecutive%20Ones/README.md) | `贪心`,`数组`,`前缀和`,`滑动窗口` | 困难 | | | [1704](https://leetcode-cn.com/problems/determine-if-string-halves-are-alike) | [判断字符串的两半是否相似](/solution/1700-1799/1704.Determine%20if%20String%20Halves%20Are%20Alike/README.md) | `字符串`,`计数` | 简单 | | | [1705](https://leetcode-cn.com/problems/maximum-number-of-eaten-apples) | [吃苹果的最大数目](/solution/1700-1799/1705.Maximum%20Number%20of%20Eaten%20Apples/README.md) | `贪心`,`数组`,`堆（优先队列）` | 中等 | | | [1706](https://leetcode-cn.com/problems/where-will-the-ball-fall) | [球会落何处](/solution/1700-1799/1706.Where%20Will%20the%20Ball%20Fall/README.md) | `深度优先搜索`,`数组`,`动态规划`,`矩阵`,`模拟` | 中等 | | | [1707](https://leetcode-cn.com/problems/maximum-xor-with-an-element-from-array) | [与数组中元素的最大异或值](/solution/1700-1799/1707.Maximum%20XOR%20With%20an%20Element%20From%20Array/README.md) | `位运算`,`字典树`,`数组` | 困难 | | | [1708](https://leetcode-cn.com/problems/largest-subarray-length-k) | [长度为 K 的最大子数组](/solution/1700-1799/1708.Largest%20Subarray%20Length%20K/README.md) | `贪心`,`数组` | 简单 | 🔒 | | [1709](https://leetcode-cn.com/problems/biggest-window-between-visits) | [访问日期之间最大的空档期](/solution/1700-1799/1709.Biggest%20Window%20Between%20Visits/README.md) | `数据库` | 中等 | 🔒 | | [1710](https://leetcode-cn.com/problems/maximum-units-on-a-truck) | [卡车上的最大单元数](/solution/1700-1799/1710.Maximum%20Units%20on%20a%20Truck/README.md) | `贪心`,`数组`,`排序` | 简单 | | | [1711](https://leetcode-cn.com/problems/count-good-meals) | [大餐计数](/solution/1700-1799/1711.Count%20Good%20Meals/README.md) | `数组`,`哈希表` | 中等 | | | [1712](https://leetcode-cn.com/problems/ways-to-split-array-into-three-subarrays) | [将数组分成三个子数组的方案数](/solution/1700-1799/1712.Ways%20to%20Split%20Array%20Into%20Three%20Subarrays/README.md) | `数组`,`双指针`,`二分查找`,`前缀和` | 中等 | | | [1713](https://leetcode-cn.com/problems/minimum-operations-to-make-a-subsequence) | [得到子序列的最少操作次数](/solution/1700-1799/1713.Minimum%20Operations%20to%20Make%20a%20Subsequence/README.md) | `贪心`,`数组`,`哈希表`,`二分查找` | 困难 | | | [1714](https://leetcode-cn.com/problems/sum-of-special-evenly-spaced-elements-in-array) | [数组中特殊等间距元素的和](/solution/1700-1799/1714.Sum%20Of%20Special%20Evenly-Spaced%20Elements%20In%20Array/README.md) | `数组`,`动态规划` | 困难 | 🔒 | | [1715](https://leetcode-cn.com/problems/count-apples-and-oranges) | [苹果和橘子的个数](/solution/1700-1799/1715.Count%20Apples%20and%20Oranges/README.md) | `数据库` | 中等 | 🔒 | | [1716](https://leetcode-cn.com/problems/calculate-money-in-leetcode-bank) | [计算力扣银行的钱](/solution/1700-1799/1716.Calculate%20Money%20in%20Leetcode%20Bank/README.md) | `数学` | 简单 | | | [1717](https://leetcode-cn.com/problems/maximum-score-from-removing-substrings) | [删除子字符串的最大得分](/solution/1700-1799/1717.Maximum%20Score%20From%20Removing%20Substrings/README.md) | `栈`,`贪心`,`字符串` | 中等 | | | [1718](https://leetcode-cn.com/problems/construct-the-lexicographically-largest-valid-sequence) | [构建字典序最大的可行序列](/solution/1700-1799/1718.Construct%20the%20Lexicographically%20Largest%20Valid%20Sequence/README.md) | `数组`,`回溯` | 中等 | | | [1719](https://leetcode-cn.com/problems/number-of-ways-to-reconstruct-a-tree) | [重构一棵树的方案数](/solution/1700-1799/1719.Number%20Of%20Ways%20To%20Reconstruct%20A%20Tree/README.md) | `树`,`图`,`拓扑排序` | 困难 | | | [1720](https://leetcode-cn.com/problems/decode-xored-array) | [解码异或后的数组](/solution/1700-1799/1720.Decode%20XORed%20Array/README.md) | `位运算`,`数组` | 简单 | | | [1721](https://leetcode-cn.com/problems/swapping-nodes-in-a-linked-list) | [交换链表中的节点](/solution/1700-1799/1721.Swapping%20Nodes%20in%20a%20Linked%20List/README.md) | `链表`,`双指针` | 中等 | | | [1722](https://leetcode-cn.com/problems/minimize-hamming-distance-after-swap-operations) | [执行交换操作后的最小汉明距离](/solution/1700-1799/1722.Minimize%20Hamming%20Distance%20After%20Swap%20Operations/README.md) | `深度优先搜索`,`并查集`,`数组` | 中等 | | | [1723](https://leetcode-cn.com/problems/find-minimum-time-to-finish-all-jobs) | [完成所有工作的最短时间](/solution/1700-1799/1723.Find%20Minimum%20Time%20to%20Finish%20All%20Jobs/README.md) | `位运算`,`数组`,`动态规划`,`回溯`,`状态压缩` | 困难 | | | [1724](https://leetcode-cn.com/problems/checking-existence-of-edge-length-limited-paths-ii) | [检查边长度限制的路径是否存在 II](/solution/1700-1799/1724.Checking%20Existence%20of%20Edge%20Length%20Limited%20Paths%20II/README.md) | `并查集`,`图`,`最小生成树` | 困难 | 🔒 | | [1725](https://leetcode-cn.com/problems/number-of-rectangles-that-can-form-the-largest-square) | [可以形成最大正方形的矩形数目](/solution/1700-1799/1725.Number%20Of%20Rectangles%20That%20Can%20Form%20The%20Largest%20Square/README.md) | `数组` | 简单 | | | [1726](https://leetcode-cn.com/problems/tuple-with-same-product) | [同积元组](/solution/1700-1799/1726.Tuple%20with%20Same%20Product/README.md) | `数组`,`哈希表` | 中等 | | | [1727](https://leetcode-cn.com/problems/largest-submatrix-with-rearrangements) | [重新排列后的最大子矩阵](/solution/1700-1799/1727.Largest%20Submatrix%20With%20Rearrangements/README.md) | `贪心`,`数组`,`矩阵`,`排序` | 中等 | | | [1728](https://leetcode-cn.com/problems/cat-and-mouse-ii) | [猫和老鼠 II](/solution/1700-1799/1728.Cat%20and%20Mouse%20II/README.md) | `广度优先搜索`,`图`,`记忆化搜索`,`数学`,`动态规划`,`博弈` | 困难 | | | [1729](https://leetcode-cn.com/problems/find-followers-count) | [求关注者的数量](/solution/1700-1799/1729.Find%20Followers%20Count/README.md) | `数据库` | 简单 | | | [1730](https://leetcode-cn.com/problems/shortest-path-to-get-food) | [获取食物的最短路径](/solution/1700-1799/1730.Shortest%20Path%20to%20Get%20Food/README.md) | `广度优先搜索`,`数组`,`矩阵` | 中等 | 🔒 | | [1731](https://leetcode-cn.com/problems/the-number-of-employees-which-report-to-each-employee) | [每位经理的下属员工数量](/solution/1700-1799/1731.The%20Number%20of%20Employees%20Which%20Report%20to%20Each%20Employee/README.md) | `数据库` | 简单 | 🔒 | | [1732](https://leetcode-cn.com/problems/find-the-highest-altitude) | [找到最高海拔](/solution/1700-1799/1732.Find%20the%20Highest%20Altitude/README.md) | `数组`,`前缀和` | 简单 | | | [1733](https://leetcode-cn.com/problems/minimum-number-of-people-to-teach) | [需要教语言的最少人数](/solution/1700-1799/1733.Minimum%20Number%20of%20People%20to%20Teach/README.md) | `贪心`,`数组` | 中等 | | | [1734](https://leetcode-cn.com/problems/decode-xored-permutation) | [解码异或后的排列](/solution/1700-1799/1734.Decode%20XORed%20Permutation/README.md) | `位运算`,`数组` | 中等 | | | [1735](https://leetcode-cn.com/problems/count-ways-to-make-array-with-product) | [生成乘积数组的方案数](/solution/1700-1799/1735.Count%20Ways%20to%20Make%20Array%20With%20Product/README.md) | `数组`,`数学`,`动态规划` | 困难 | | | [1736](https://leetcode-cn.com/problems/latest-time-by-replacing-hidden-digits) | [替换隐藏数字得到的最晚时间](/solution/1700-1799/1736.Latest%20Time%20by%20Replacing%20Hidden%20Digits/README.md) | `字符串` | 简单 | | | [1737](https://leetcode-cn.com/problems/change-minimum-characters-to-satisfy-one-of-three-conditions) | [满足三条件之一需改变的最少字符数](/solution/1700-1799/1737.Change%20Minimum%20Characters%20to%20Satisfy%20One%20of%20Three%20Conditions/README.md) | `哈希表`,`字符串`,`计数`,`前缀和` | 中等 | | | [1738](https://leetcode-cn.com/problems/find-kth-largest-xor-coordinate-value) | [找出第 K 大的异或坐标值](/solution/1700-1799/1738.Find%20Kth%20Largest%20XOR%20Coordinate%20Value/README.md) | `位运算`,`数组`,`分治`,`矩阵`,`前缀和`,`快速选择`,`堆（优先队列）` | 中等 | | | [1739](https://leetcode-cn.com/problems/building-boxes) | [放置盒子](/solution/1700-1799/1739.Building%20Boxes/README.md) | `贪心`,`数学`,`二分查找` | 困难 | | | [1740](https://leetcode-cn.com/problems/find-distance-in-a-binary-tree) | [找到二叉树中的距离](/solution/1700-1799/1740.Find%20Distance%20in%20a%20Binary%20Tree/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`哈希表`,`二叉树` | 中等 | 🔒 | | [1741](https://leetcode-cn.com/problems/find-total-time-spent-by-each-employee) | [查找每个员工花费的总时间](/solution/1700-1799/1741.Find%20Total%20Time%20Spent%20by%20Each%20Employee/README.md) | `数据库` | 简单 | | | [1742](https://leetcode-cn.com/problems/maximum-number-of-balls-in-a-box) | [盒子中小球的最大数量](/solution/1700-1799/1742.Maximum%20Number%20of%20Balls%20in%20a%20Box/README.md) | `哈希表`,`数学`,`计数` | 简单 | | | [1743](https://leetcode-cn.com/problems/restore-the-array-from-adjacent-pairs) | [从相邻元素对还原数组](/solution/1700-1799/1743.Restore%20the%20Array%20From%20Adjacent%20Pairs/README.md) | `数组`,`哈希表` | 中等 | | | [1744](https://leetcode-cn.com/problems/can-you-eat-your-favorite-candy-on-your-favorite-day) | [你能在你最喜欢的那天吃到你最喜欢的糖果吗？](/solution/1700-1799/1744.Can%20You%20Eat%20Your%20Favorite%20Candy%20on%20Your%20Favorite%20Day/README.md) | `数组`,`前缀和` | 中等 | | | [1745](https://leetcode-cn.com/problems/palindrome-partitioning-iv) | [回文串分割 IV](/solution/1700-1799/1745.Palindrome%20Partitioning%20IV/README.md) | `字符串`,`动态规划` | 困难 | | | [1746](https://leetcode-cn.com/problems/maximum-subarray-sum-after-one-operation) | [经过一次操作后的最大子数组和](/solution/1700-1799/1746.Maximum%20Subarray%20Sum%20After%20One%20Operation/README.md) | `数组`,`动态规划` | 中等 | 🔒 | | [1747](https://leetcode-cn.com/problems/leetflex-banned-accounts) | [应该被禁止的 Leetflex 账户](/solution/1700-1799/1747.Leetflex%20Banned%20Accounts/README.md) | `数据库` | 中等 | 🔒 | | [1748](https://leetcode-cn.com/problems/sum-of-unique-elements) | [唯一元素的和](/solution/1700-1799/1748.Sum%20of%20Unique%20Elements/README.md) | `数组`,`哈希表`,`计数` | 简单 | | | [1749](https://leetcode-cn.com/problems/maximum-absolute-sum-of-any-subarray) | [任意子数组和的绝对值的最大值](/solution/1700-1799/1749.Maximum%20Absolute%20Sum%20of%20Any%20Subarray/README.md) | `数组`,`动态规划` | 中等 | | | [1750](https://leetcode-cn.com/problems/minimum-length-of-string-after-deleting-similar-ends) | [删除字符串两端相同字符后的最短长度](/solution/1700-1799/1750.Minimum%20Length%20of%20String%20After%20Deleting%20Similar%20Ends/README.md) | `双指针`,`字符串` | 中等 | | | [1751](https://leetcode-cn.com/problems/maximum-number-of-events-that-can-be-attended-ii) | [最多可以参加的会议数目 II](/solution/1700-1799/1751.Maximum%20Number%20of%20Events%20That%20Can%20Be%20Attended%20II/README.md) | `数组`,`二分查找`,`动态规划` | 困难 | | | [1752](https://leetcode-cn.com/problems/check-if-array-is-sorted-and-rotated) | [检查数组是否经排序和轮转得到](/solution/1700-1799/1752.Check%20if%20Array%20Is%20Sorted%20and%20Rotated/README.md) | `数组` | 简单 | | | [1753](https://leetcode-cn.com/problems/maximum-score-from-removing-stones) | [移除石子的最大得分](/solution/1700-1799/1753.Maximum%20Score%20From%20Removing%20Stones/README.md) | `贪心`,`数学`,`堆（优先队列）` | 中等 | | | [1754](https://leetcode-cn.com/problems/largest-merge-of-two-strings) | [构造字典序最大的合并字符串](/solution/1700-1799/1754.Largest%20Merge%20Of%20Two%20Strings/README.md) | `贪心`,`双指针`,`字符串` | 中等 | | | [1755](https://leetcode-cn.com/problems/closest-subsequence-sum) | [最接近目标值的子序列和](/solution/1700-1799/1755.Closest%20Subsequence%20Sum/README.md) | `位运算`,`数组`,`双指针`,`动态规划`,`状态压缩` | 困难 | | | [1756](https://leetcode-cn.com/problems/design-most-recently-used-queue) | [设计最近使用（MRU）队列](/solution/1700-1799/1756.Design%20Most%20Recently%20Used%20Queue/README.md) | `栈`,`设计`,`树状数组`,`数组`,`哈希表`,`有序集合` | 中等 | 🔒 | | [1757](https://leetcode-cn.com/problems/recyclable-and-low-fat-products) | [可回收且低脂的产品](/solution/1700-1799/1757.Recyclable%20and%20Low%20Fat%20Products/README.md) | `数据库` | 简单 | | | [1758](https://leetcode-cn.com/problems/minimum-changes-to-make-alternating-binary-string) | [生成交替二进制字符串的最少操作数](/solution/1700-1799/1758.Minimum%20Changes%20To%20Make%20Alternating%20Binary%20String/README.md) | `字符串` | 简单 | | | [1759](https://leetcode-cn.com/problems/count-number-of-homogenous-substrings) | [统计同构子字符串的数目](/solution/1700-1799/1759.Count%20Number%20of%20Homogenous%20Substrings/README.md) | `数学`,`字符串` | 中等 | | | [1760](https://leetcode-cn.com/problems/minimum-limit-of-balls-in-a-bag) | [袋子里最少数目的球](/solution/1700-1799/1760.Minimum%20Limit%20of%20Balls%20in%20a%20Bag/README.md) | `数组`,`二分查找` | 中等 | | | [1761](https://leetcode-cn.com/problems/minimum-degree-of-a-connected-trio-in-a-graph) | [一个图中连通三元组的最小度数](/solution/1700-1799/1761.Minimum%20Degree%20of%20a%20Connected%20Trio%20in%20a%20Graph/README.md) | `图` | 困难 | | | [1762](https://leetcode-cn.com/problems/buildings-with-an-ocean-view) | [能看到海景的建筑物](/solution/1700-1799/1762.Buildings%20With%20an%20Ocean%20View/README.md) | `栈`,`数组`,`单调栈` | 中等 | 🔒 | | [1763](https://leetcode-cn.com/problems/longest-nice-substring) | [最长的美好子字符串](/solution/1700-1799/1763.Longest%20Nice%20Substring/README.md) | `位运算`,`哈希表`,`字符串`,`滑动窗口` | 简单 | | | [1764](https://leetcode-cn.com/problems/form-array-by-concatenating-subarrays-of-another-array) | [通过连接另一个数组的子数组得到一个数组](/solution/1700-1799/1764.Form%20Array%20by%20Concatenating%20Subarrays%20of%20Another%20Array/README.md) | `贪心`,`数组`,`字符串匹配` | 中等 | | | [1765](https://leetcode-cn.com/problems/map-of-highest-peak) | [地图中的最高点](/solution/1700-1799/1765.Map%20of%20Highest%20Peak/README.md) | `广度优先搜索`,`数组`,`矩阵` | 中等 | | | [1766](https://leetcode-cn.com/problems/tree-of-coprimes) | [互质树](/solution/1700-1799/1766.Tree%20of%20Coprimes/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`数学` | 困难 | | | [1767](https://leetcode-cn.com/problems/find-the-subtasks-that-did-not-execute) | [寻找没有被执行的任务对](/solution/1700-1799/1767.Find%20the%20Subtasks%20That%20Did%20Not%20Execute/README.md) | `数据库` | 困难 | 🔒 | | [1768](https://leetcode-cn.com/problems/merge-strings-alternately) | [交替合并字符串](/solution/1700-1799/1768.Merge%20Strings%20Alternately/README.md) | `双指针`,`字符串` | 简单 | | | [1769](https://leetcode-cn.com/problems/minimum-number-of-operations-to-move-all-balls-to-each-box) | [移动所有球到每个盒子所需的最小操作数](/solution/1700-1799/1769.Minimum%20Number%20of%20Operations%20to%20Move%20All%20Balls%20to%20Each%20Box/README.md) | `数组`,`字符串` | 中等 | | | [1770](https://leetcode-cn.com/problems/maximum-score-from-performing-multiplication-operations) | [执行乘法运算的最大分数](/solution/1700-1799/1770.Maximum%20Score%20from%20Performing%20Multiplication%20Operations/README.md) | `数组`,`动态规划` | 中等 | | | [1771](https://leetcode-cn.com/problems/maximize-palindrome-length-from-subsequences) | [由子序列构造的最长回文串的长度](/solution/1700-1799/1771.Maximize%20Palindrome%20Length%20From%20Subsequences/README.md) | `字符串`,`动态规划` | 困难 | | | [1772](https://leetcode-cn.com/problems/sort-features-by-popularity) | [按受欢迎程度排列功能](/solution/1700-1799/1772.Sort%20Features%20by%20Popularity/README.md) | `数组`,`哈希表`,`字符串`,`排序` | 中等 | 🔒 | | [1773](https://leetcode-cn.com/problems/count-items-matching-a-rule) | [统计匹配检索规则的物品数量](/solution/1700-1799/1773.Count%20Items%20Matching%20a%20Rule/README.md) | `数组`,`字符串` | 简单 | | | [1774](https://leetcode-cn.com/problems/closest-dessert-cost) | [最接近目标价格的甜点成本](/solution/1700-1799/1774.Closest%20Dessert%20Cost/README.md) | `数组`,`动态规划`,`回溯` | 中等 | | | [1775](https://leetcode-cn.com/problems/equal-sum-arrays-with-minimum-number-of-operations) | [通过最少操作次数使数组的和相等](/solution/1700-1799/1775.Equal%20Sum%20Arrays%20With%20Minimum%20Number%20of%20Operations/README.md) | `贪心`,`数组`,`哈希表`,`计数` | 中等 | | | [1776](https://leetcode-cn.com/problems/car-fleet-ii) | [车队 II](/solution/1700-1799/1776.Car%20Fleet%20II/README.md) | `栈`,`数组`,`数学`,`单调栈`,`堆（优先队列）` | 困难 | | | [1777](https://leetcode-cn.com/problems/products-price-for-each-store) | [每家商店的产品价格](/solution/1700-1799/1777.Product%27s%20Price%20for%20Each%20Store/README.md) | `数据库` | 简单 | 🔒 | | [1778](https://leetcode-cn.com/problems/shortest-path-in-a-hidden-grid) | [未知网格中的最短路径](/solution/1700-1799/1778.Shortest%20Path%20in%20a%20Hidden%20Grid/README.md) | `深度优先搜索`,`广度优先搜索`,`图`,`交互` | 中等 | 🔒 | | [1779](https://leetcode-cn.com/problems/find-nearest-point-that-has-the-same-x-or-y-coordinate) | [找到最近的有相同 X 或 Y 坐标的点](/solution/1700-1799/1779.Find%20Nearest%20Point%20That%20Has%20the%20Same%20X%20or%20Y%20Coordinate/README.md) | `数组` | 简单 | | | [1780](https://leetcode-cn.com/problems/check-if-number-is-a-sum-of-powers-of-three) | [判断一个数字是否可以表示成三的幂的和](/solution/1700-1799/1780.Check%20if%20Number%20is%20a%20Sum%20of%20Powers%20of%20Three/README.md) | `数学` | 中等 | | | [1781](https://leetcode-cn.com/problems/sum-of-beauty-of-all-substrings) | [所有子字符串美丽值之和](/solution/1700-1799/1781.Sum%20of%20Beauty%20of%20All%20Substrings/README.md) | `哈希表`,`字符串`,`计数` | 中等 | | | [1782](https://leetcode-cn.com/problems/count-pairs-of-nodes) | [统计点对的数目](/solution/1700-1799/1782.Count%20Pairs%20Of%20Nodes/README.md) | `图`,`双指针`,`二分查找` | 困难 | | | [1783](https://leetcode-cn.com/problems/grand-slam-titles) | [大满贯数量](/solution/1700-1799/1783.Grand%20Slam%20Titles/README.md) | `数据库` | 中等 | 🔒 | | [1784](https://leetcode-cn.com/problems/check-if-binary-string-has-at-most-one-segment-of-ones) | [检查二进制字符串字段](/solution/1700-1799/1784.Check%20if%20Binary%20String%20Has%20at%20Most%20One%20Segment%20of%20Ones/README.md) | `字符串` | 简单 | | | [1785](https://leetcode-cn.com/problems/minimum-elements-to-add-to-form-a-given-sum) | [构成特定和需要添加的最少元素](/solution/1700-1799/1785.Minimum%20Elements%20to%20Add%20to%20Form%20a%20Given%20Sum/README.md) | `贪心`,`数组` | 中等 | | | [1786](https://leetcode-cn.com/problems/number-of-restricted-paths-from-first-to-last-node) | [从第一个节点出发到最后一个节点的受限路径数](/solution/1700-1799/1786.Number%20of%20Restricted%20Paths%20From%20First%20to%20Last%20Node/README.md) | `图`,`拓扑排序`,`动态规划`,`最短路`,`堆（优先队列）` | 中等 | | | [1787](https://leetcode-cn.com/problems/make-the-xor-of-all-segments-equal-to-zero) | [使所有区间的异或结果为零](/solution/1700-1799/1787.Make%20the%20XOR%20of%20All%20Segments%20Equal%20to%20Zero/README.md) | `位运算`,`数组`,`动态规划` | 困难 | | | [1788](https://leetcode-cn.com/problems/maximize-the-beauty-of-the-garden) | [最大化花园的美观度](/solution/1700-1799/1788.Maximize%20the%20Beauty%20of%20the%20Garden/README.md) | `贪心`,`数组`,`前缀和` | 困难 | 🔒 | | [1789](https://leetcode-cn.com/problems/primary-department-for-each-employee) | [员工的直属部门](/solution/1700-1799/1789.Primary%20Department%20for%20Each%20Employee/README.md) | `数据库` | 简单 | 🔒 | | [1790](https://leetcode-cn.com/problems/check-if-one-string-swap-can-make-strings-equal) | [仅执行一次字符串交换能否使两个字符串相等](/solution/1700-1799/1790.Check%20if%20One%20String%20Swap%20Can%20Make%20Strings%20Equal/README.md) | `哈希表`,`字符串`,`计数` | 简单 | | | [1791](https://leetcode-cn.com/problems/find-center-of-star-graph) | [找出星型图的中心节点](/solution/1700-1799/1791.Find%20Center%20of%20Star%20Graph/README.md) | `图` | 简单 | | | [1792](https://leetcode-cn.com/problems/maximum-average-pass-ratio) | [最大平均通过率](/solution/1700-1799/1792.Maximum%20Average%20Pass%20Ratio/README.md) | `贪心`,`数组`,`堆（优先队列）` | 中等 | | | [1793](https://leetcode-cn.com/problems/maximum-score-of-a-good-subarray) | [好子数组的最大分数](/solution/1700-1799/1793.Maximum%20Score%20of%20a%20Good%20Subarray/README.md) | `栈`,`数组`,`双指针`,`二分查找`,`单调栈` | 困难 | | | [1794](https://leetcode-cn.com/problems/count-pairs-of-equal-substrings-with-minimum-difference) | [统计距离最小的子串对个数](/solution/1700-1799/1794.Count%20Pairs%20of%20Equal%20Substrings%20With%20Minimum%20Difference/README.md) | `贪心`,`哈希表`,`字符串` | 中等 | 🔒 | | [1795](https://leetcode-cn.com/problems/rearrange-products-table) | [每个产品在不同商店的价格](/solution/1700-1799/1795.Rearrange%20Products%20Table/README.md) | `数据库` | 简单 | | | [1796](https://leetcode-cn.com/problems/second-largest-digit-in-a-string) | [字符串中第二大的数字](/solution/1700-1799/1796.Second%20Largest%20Digit%20in%20a%20String/README.md) | `哈希表`,`字符串` | 简单 | | | [1797](https://leetcode-cn.com/problems/design-authentication-manager) | [设计一个验证系统](/solution/1700-1799/1797.Design%20Authentication%20Manager/README.md) | `设计`,`哈希表` | 中等 | | | [1798](https://leetcode-cn.com/problems/maximum-number-of-consecutive-values-you-can-make) | [你能构造出连续值的最大数目](/solution/1700-1799/1798.Maximum%20Number%20of%20Consecutive%20Values%20You%20Can%20Make/README.md) | `贪心`,`数组` | 中等 | | | [1799](https://leetcode-cn.com/problems/maximize-score-after-n-operations) | [N 次操作后的最大分数和](/solution/1700-1799/1799.Maximize%20Score%20After%20N%20Operations/README.md) | `位运算`,`数组`,`数学`,`动态规划`,`回溯`,`状态压缩`,`数论` | 困难 | | | [1800](https://leetcode-cn.com/problems/maximum-ascending-subarray-sum) | [最大升序子数组和](/solution/1800-1899/1800.Maximum%20Ascending%20Subarray%20Sum/README.md) | `数组` | 简单 | | | [1801](https://leetcode-cn.com/problems/number-of-orders-in-the-backlog) | [积压订单中的订单总数](/solution/1800-1899/1801.Number%20of%20Orders%20in%20the%20Backlog/README.md) | `数组`,`模拟`,`堆（优先队列）` | 中等 | | | [1802](https://leetcode-cn.com/problems/maximum-value-at-a-given-index-in-a-bounded-array) | [有界数组中指定下标处的最大值](/solution/1800-1899/1802.Maximum%20Value%20at%20a%20Given%20Index%20in%20a%20Bounded%20Array/README.md) | `贪心`,`二分查找` | 中等 | | | [1803](https://leetcode-cn.com/problems/count-pairs-with-xor-in-a-range) | [统计异或值在范围内的数对有多少](/solution/1800-1899/1803.Count%20Pairs%20With%20XOR%20in%20a%20Range/README.md) | `位运算`,`字典树`,`数组` | 困难 | | | [1804](https://leetcode-cn.com/problems/implement-trie-ii-prefix-tree) | [实现 Trie （前缀树） II](/solution/1800-1899/1804.Implement%20Trie%20II%20%28Prefix%20Tree%29/README.md) | `设计`,`字典树`,`哈希表`,`字符串` | 中等 | 🔒 | | [1805](https://leetcode-cn.com/problems/number-of-different-integers-in-a-string) | [字符串中不同整数的数目](/solution/1800-1899/1805.Number%20of%20Different%20Integers%20in%20a%20String/README.md) | `哈希表`,`字符串` | 简单 | | | [1806](https://leetcode-cn.com/problems/minimum-number-of-operations-to-reinitialize-a-permutation) | [还原排列的最少操作步数](/solution/1800-1899/1806.Minimum%20Number%20of%20Operations%20to%20Reinitialize%20a%20Permutation/README.md) | `数组`,`数学`,`模拟` | 中等 | | | [1807](https://leetcode-cn.com/problems/evaluate-the-bracket-pairs-of-a-string) | [替换字符串中的括号内容](/solution/1800-1899/1807.Evaluate%20the%20Bracket%20Pairs%20of%20a%20String/README.md) | `数组`,`哈希表`,`字符串` | 中等 | | | [1808](https://leetcode-cn.com/problems/maximize-number-of-nice-divisors) | [好因子的最大数目](/solution/1800-1899/1808.Maximize%20Number%20of%20Nice%20Divisors/README.md) | `递归`,`数学` | 困难 | | | [1809](https://leetcode-cn.com/problems/ad-free-sessions) | [没有广告的剧集](/solution/1800-1899/1809.Ad-Free%20Sessions/README.md) | `数据库` | 简单 | 🔒 | | [1810](https://leetcode-cn.com/problems/minimum-path-cost-in-a-hidden-grid) | [隐藏网格下的最小消耗路径](/solution/1800-1899/1810.Minimum%20Path%20Cost%20in%20a%20Hidden%20Grid/README.md) | `深度优先搜索`,`广度优先搜索`,`图`,`交互`,`堆（优先队列）` | 中等 | 🔒 | | [1811](https://leetcode-cn.com/problems/find-interview-candidates) | [寻找面试候选人](/solution/1800-1899/1811.Find%20Interview%20Candidates/README.md) | `数据库` | 中等 | 🔒 | | [1812](https://leetcode-cn.com/problems/determine-color-of-a-chessboard-square) | [判断国际象棋棋盘中一个格子的颜色](/solution/1800-1899/1812.Determine%20Color%20of%20a%20Chessboard%20Square/README.md) | `数学`,`字符串` | 简单 | | | [1813](https://leetcode-cn.com/problems/sentence-similarity-iii) | [句子相似性 III](/solution/1800-1899/1813.Sentence%20Similarity%20III/README.md) | `数组`,`双指针`,`字符串` | 中等 | | | [1814](https://leetcode-cn.com/problems/count-nice-pairs-in-an-array) | [统计一个数组中好对子的数目](/solution/1800-1899/1814.Count%20Nice%20Pairs%20in%20an%20Array/README.md) | `数组`,`哈希表`,`数学`,`计数` | 中等 | | | [1815](https://leetcode-cn.com/problems/maximum-number-of-groups-getting-fresh-donuts) | [得到新鲜甜甜圈的最多组数](/solution/1800-1899/1815.Maximum%20Number%20of%20Groups%20Getting%20Fresh%20Donuts/README.md) | `位运算`,`记忆化搜索`,`数组`,`动态规划`,`状态压缩` | 困难 | | | [1816](https://leetcode-cn.com/problems/truncate-sentence) | [截断句子](/solution/1800-1899/1816.Truncate%20Sentence/README.md) | `数组`,`字符串` | 简单 | | | [1817](https://leetcode-cn.com/problems/finding-the-users-active-minutes) | [查找用户活跃分钟数](/solution/1800-1899/1817.Finding%20the%20Users%20Active%20Minutes/README.md) | `数组`,`哈希表` | 中等 | | | [1818](https://leetcode-cn.com/problems/minimum-absolute-sum-difference) | [绝对差值和](/solution/1800-1899/1818.Minimum%20Absolute%20Sum%20Difference/README.md) | `数组`,`二分查找`,`有序集合`,`排序` | 中等 | | | [1819](https://leetcode-cn.com/problems/number-of-different-subsequences-gcds) | [序列中不同最大公约数的数目](/solution/1800-1899/1819.Number%20of%20Different%20Subsequences%20GCDs/README.md) | `数组`,`数学`,`计数`,`数论` | 困难 | | | [1820](https://leetcode-cn.com/problems/maximum-number-of-accepted-invitations) | [最多邀请的个数](/solution/1800-1899/1820.Maximum%20Number%20of%20Accepted%20Invitations/README.md) | `数组`,`回溯`,`矩阵` | 中等 | 🔒 | | [1821](https://leetcode-cn.com/problems/find-customers-with-positive-revenue-this-year) | [寻找今年具有正收入的客户](/solution/1800-1899/1821.Find%20Customers%20With%20Positive%20Revenue%20this%20Year/README.md) | `数据库` | 简单 | 🔒 | | [1822](https://leetcode-cn.com/problems/sign-of-the-product-of-an-array) | [数组元素积的符号](/solution/1800-1899/1822.Sign%20of%20the%20Product%20of%20an%20Array/README.md) | `数组`,`数学` | 简单 | | | [1823](https://leetcode-cn.com/problems/find-the-winner-of-the-circular-game) | [找出游戏的获胜者](/solution/1800-1899/1823.Find%20the%20Winner%20of%20the%20Circular%20Game/README.md) | `递归`,`队列`,`数组`,`数学`,`模拟` | 中等 | | | [1824](https://leetcode-cn.com/problems/minimum-sideway-jumps) | [最少侧跳次数](/solution/1800-1899/1824.Minimum%20Sideway%20Jumps/README.md) | `贪心`,`数组`,`动态规划` | 中等 | | | [1825](https://leetcode-cn.com/problems/finding-mk-average) | [求出 MK 平均值](/solution/1800-1899/1825.Finding%20MK%20Average/README.md) | `设计`,`队列`,`有序集合`,`堆（优先队列）` | 困难 | | | [1826](https://leetcode-cn.com/problems/faulty-sensor) | [有缺陷的传感器](/solution/1800-1899/1826.Faulty%20Sensor/README.md) | `数组`,`双指针` | 简单 | 🔒 | | [1827](https://leetcode-cn.com/problems/minimum-operations-to-make-the-array-increasing) | [最少操作使数组递增](/solution/1800-1899/1827.Minimum%20Operations%20to%20Make%20the%20Array%20Increasing/README.md) | `贪心`,`数组` | 简单 | | | [1828](https://leetcode-cn.com/problems/queries-on-number-of-points-inside-a-circle) | [统计一个圆中点的数目](/solution/1800-1899/1828.Queries%20on%20Number%20of%20Points%20Inside%20a%20Circle/README.md) | `几何`,`数组`,`数学` | 中等 | | | [1829](https://leetcode-cn.com/problems/maximum-xor-for-each-query) | [每个查询的最大异或值](/solution/1800-1899/1829.Maximum%20XOR%20for%20Each%20Query/README.md) | `位运算`,`数组`,`前缀和` | 中等 | | | [1830](https://leetcode-cn.com/problems/minimum-number-of-operations-to-make-string-sorted) | [使字符串有序的最少操作次数](/solution/1800-1899/1830.Minimum%20Number%20of%20Operations%20to%20Make%20String%20Sorted/README.md) | `数学`,`字符串`,`组合数学` | 困难 | | | [1831](https://leetcode-cn.com/problems/maximum-transaction-each-day) | [每天的最大交易](/solution/1800-1899/1831.Maximum%20Transaction%20Each%20Day/README.md) | `数据库` | 中等 | 🔒 | | [1832](https://leetcode-cn.com/problems/check-if-the-sentence-is-pangram) | [判断句子是否为全字母句](/solution/1800-1899/1832.Check%20if%20the%20Sentence%20Is%20Pangram/README.md) | `哈希表`,`字符串` | 简单 | | | [1833](https://leetcode-cn.com/problems/maximum-ice-cream-bars) | [雪糕的最大数量](/solution/1800-1899/1833.Maximum%20Ice%20Cream%20Bars/README.md) | `贪心`,`数组`,`排序` | 中等 | | | [1834](https://leetcode-cn.com/problems/single-threaded-cpu) | [单线程 CPU](/solution/1800-1899/1834.Single-Threaded%20CPU/README.md) | `数组`,`排序`,`堆（优先队列）` | 中等 | | | [1835](https://leetcode-cn.com/problems/find-xor-sum-of-all-pairs-bitwise-and) | [所有数对按位与结果的异或和](/solution/1800-1899/1835.Find%20XOR%20Sum%20of%20All%20Pairs%20Bitwise%20AND/README.md) | `位运算`,`数组`,`数学` | 困难 | | | [1836](https://leetcode-cn.com/problems/remove-duplicates-from-an-unsorted-linked-list) | [从未排序的链表中移除重复元素](/solution/1800-1899/1836.Remove%20Duplicates%20From%20an%20Unsorted%20Linked%20List/README.md) | `哈希表`,`链表` | 中等 | 🔒 | | [1837](https://leetcode-cn.com/problems/sum-of-digits-in-base-k) | [K 进制表示下的各位数字总和](/solution/1800-1899/1837.Sum%20of%20Digits%20in%20Base%20K/README.md) | `数学` | 简单 | | | [1838](https://leetcode-cn.com/problems/frequency-of-the-most-frequent-element) | [最高频元素的频数](/solution/1800-1899/1838.Frequency%20of%20the%20Most%20Frequent%20Element/README.md) | `数组`,`二分查找`,`前缀和`,`滑动窗口` | 中等 | | | [1839](https://leetcode-cn.com/problems/longest-substring-of-all-vowels-in-order) | [所有元音按顺序排布的最长子字符串](/solution/1800-1899/1839.Longest%20Substring%20Of%20All%20Vowels%20in%20Order/README.md) | `字符串`,`滑动窗口` | 中等 | | | [1840](https://leetcode-cn.com/problems/maximum-building-height) | [最高建筑高度](/solution/1800-1899/1840.Maximum%20Building%20Height/README.md) | `数组`,`数学` | 困难 | | | [1841](https://leetcode-cn.com/problems/league-statistics) | [联赛信息统计](/solution/1800-1899/1841.League%20Statistics/README.md) | `数据库` | 中等 | 🔒 | | [1842](https://leetcode-cn.com/problems/next-palindrome-using-same-digits) | [下个由相同数字构成的回文串](/solution/1800-1899/1842.Next%20Palindrome%20Using%20Same%20Digits/README.md) | `双指针`,`字符串` | 困难 | 🔒 | | [1843](https://leetcode-cn.com/problems/suspicious-bank-accounts) | [可疑银行账户](/solution/1800-1899/1843.Suspicious%20Bank%20Accounts/README.md) | `数据库` | 中等 | 🔒 | | [1844](https://leetcode-cn.com/problems/replace-all-digits-with-characters) | [将所有数字用字符替换](/solution/1800-1899/1844.Replace%20All%20Digits%20with%20Characters/README.md) | `字符串` | 简单 | | | [1845](https://leetcode-cn.com/problems/seat-reservation-manager) | [座位预约管理系统](/solution/1800-1899/1845.Seat%20Reservation%20Manager/README.md) | `设计`,`堆（优先队列）` | 中等 | | | [1846](https://leetcode-cn.com/problems/maximum-element-after-decreasing-and-rearranging) | [减小和重新排列数组后的最大元素](/solution/1800-1899/1846.Maximum%20Element%20After%20Decreasing%20and%20Rearranging/README.md) | `贪心`,`数组`,`排序` | 中等 | | | [1847](https://leetcode-cn.com/problems/closest-room) | [最近的房间](/solution/1800-1899/1847.Closest%20Room/README.md) | `数组`,`二分查找`,`排序` | 困难 | | | [1848](https://leetcode-cn.com/problems/minimum-distance-to-the-target-element) | [到目标元素的最小距离](/solution/1800-1899/1848.Minimum%20Distance%20to%20the%20Target%20Element/README.md) | `数组` | 简单 | | | [1849](https://leetcode-cn.com/problems/splitting-a-string-into-descending-consecutive-values) | [将字符串拆分为递减的连续值](/solution/1800-1899/1849.Splitting%20a%20String%20Into%20Descending%20Consecutive%20Values/README.md) | `字符串`,`回溯` | 中等 | | | [1850](https://leetcode-cn.com/problems/minimum-adjacent-swaps-to-reach-the-kth-smallest-number) | [邻位交换的最小次数](/solution/1800-1899/1850.Minimum%20Adjacent%20Swaps%20to%20Reach%20the%20Kth%20Smallest%20Number/README.md) | `贪心`,`双指针`,`字符串` | 中等 | | | [1851](https://leetcode-cn.com/problems/minimum-interval-to-include-each-query) | [包含每个查询的最小区间](/solution/1800-1899/1851.Minimum%20Interval%20to%20Include%20Each%20Query/README.md) | `数组`,`二分查找`,`排序`,`扫描线`,`堆（优先队列）` | 困难 | | | [1852](https://leetcode-cn.com/problems/distinct-numbers-in-each-subarray) | [每个子数组的数字种类数](/solution/1800-1899/1852.Distinct%20Numbers%20in%20Each%20Subarray/README.md) | `数组`,`哈希表`,`滑动窗口` | 中等 | 🔒 | | [1853](https://leetcode-cn.com/problems/convert-date-format) | [转换日期格式](/solution/1800-1899/1853.Convert%20Date%20Format/README.md) | `数据库` | 简单 | 🔒 | | [1854](https://leetcode-cn.com/problems/maximum-population-year) | [人口最多的年份](/solution/1800-1899/1854.Maximum%20Population%20Year/README.md) | `数组`,`计数` | 简单 | | | [1855](https://leetcode-cn.com/problems/maximum-distance-between-a-pair-of-values) | [下标对中的最大距离](/solution/1800-1899/1855.Maximum%20Distance%20Between%20a%20Pair%20of%20Values/README.md) | `贪心`,`数组`,`双指针`,`二分查找` | 中等 | | | [1856](https://leetcode-cn.com/problems/maximum-subarray-min-product) | [子数组最小乘积的最大值](/solution/1800-1899/1856.Maximum%20Subarray%20Min-Product/README.md) | `栈`,`数组`,`前缀和`,`单调栈` | 中等 | | | [1857](https://leetcode-cn.com/problems/largest-color-value-in-a-directed-graph) | [有向图中最大颜色值](/solution/1800-1899/1857.Largest%20Color%20Value%20in%20a%20Directed%20Graph/README.md) | `图`,`拓扑排序`,`记忆化搜索`,`哈希表`,`动态规划`,`计数` | 困难 | | | [1858](https://leetcode-cn.com/problems/longest-word-with-all-prefixes) | [包含所有前缀的最长单词](/solution/1800-1899/1858.Longest%20Word%20With%20All%20Prefixes/README.md) | `深度优先搜索`,`字典树` | 中等 | 🔒 | | [1859](https://leetcode-cn.com/problems/sorting-the-sentence) | [将句子排序](/solution/1800-1899/1859.Sorting%20the%20Sentence/README.md) | `字符串`,`排序` | 简单 | | | [1860](https://leetcode-cn.com/problems/incremental-memory-leak) | [增长的内存泄露](/solution/1800-1899/1860.Incremental%20Memory%20Leak/README.md) | `模拟` | 中等 | | | [1861](https://leetcode-cn.com/problems/rotating-the-box) | [旋转盒子](/solution/1800-1899/1861.Rotating%20the%20Box/README.md) | `数组`,`双指针`,`矩阵` | 中等 | | | [1862](https://leetcode-cn.com/problems/sum-of-floored-pairs) | [向下取整数对和](/solution/1800-1899/1862.Sum%20of%20Floored%20Pairs/README.md) | `数组`,`数学`,`二分查找`,`前缀和` | 困难 | | | [1863](https://leetcode-cn.com/problems/sum-of-all-subset-xor-totals) | [找出所有子集的异或总和再求和](/solution/1800-1899/1863.Sum%20of%20All%20Subset%20XOR%20Totals/README.md) | `位运算`,`数组`,`数学`,`回溯`,`组合数学` | 简单 | | | [1864](https://leetcode-cn.com/problems/minimum-number-of-swaps-to-make-the-binary-string-alternating) | [构成交替字符串需要的最小交换次数](/solution/1800-1899/1864.Minimum%20Number%20of%20Swaps%20to%20Make%20the%20Binary%20String%20Alternating/README.md) | `贪心`,`字符串` | 中等 | | | [1865](https://leetcode-cn.com/problems/finding-pairs-with-a-certain-sum) | [找出和为指定值的下标对](/solution/1800-1899/1865.Finding%20Pairs%20With%20a%20Certain%20Sum/README.md) | `设计`,`数组`,`哈希表` | 中等 | | | [1866](https://leetcode-cn.com/problems/number-of-ways-to-rearrange-sticks-with-k-sticks-visible) | [恰有 K 根木棍可以看到的排列数目](/solution/1800-1899/1866.Number%20of%20Ways%20to%20Rearrange%20Sticks%20With%20K%20Sticks%20Visible/README.md) | `数学`,`动态规划`,`组合数学` | 困难 | | | [1867](https://leetcode-cn.com/problems/orders-with-maximum-quantity-above-average) | [最大数量高于平均水平的订单](/solution/1800-1899/1867.Orders%20With%20Maximum%20Quantity%20Above%20Average/README.md) | `数据库` | 中等 | 🔒 | | [1868](https://leetcode-cn.com/problems/product-of-two-run-length-encoded-arrays) | [两个行程编码数组的积](/solution/1800-1899/1868.Product%20of%20Two%20Run-Length%20Encoded%20Arrays/README.md) | `数组`,`双指针` | 中等 | 🔒 | | [1869](https://leetcode-cn.com/problems/longer-contiguous-segments-of-ones-than-zeros) | [哪种连续子字符串更长](/solution/1800-1899/1869.Longer%20Contiguous%20Segments%20of%20Ones%20than%20Zeros/README.md) | `字符串` | 简单 | | | [1870](https://leetcode-cn.com/problems/minimum-speed-to-arrive-on-time) | [准时到达的列车最小时速](/solution/1800-1899/1870.Minimum%20Speed%20to%20Arrive%20on%20Time/README.md) | `数组`,`二分查找` | 中等 | | | [1871](https://leetcode-cn.com/problems/jump-game-vii) | [跳跃游戏 VII](/solution/1800-1899/1871.Jump%20Game%20VII/README.md) | `双指针`,`字符串`,`前缀和` | 中等 | | | [1872](https://leetcode-cn.com/problems/stone-game-viii) | [石子游戏 VIII](/solution/1800-1899/1872.Stone%20Game%20VIII/README.md) | `数组`,`数学`,`动态规划`,`博弈`,`前缀和` | 困难 | | | [1873](https://leetcode-cn.com/problems/calculate-special-bonus) | [计算特殊奖金](/solution/1800-1899/1873.Calculate%20Special%20Bonus/README.md) | `数据库` | 简单 | | | [1874](https://leetcode-cn.com/problems/minimize-product-sum-of-two-arrays) | [两个数组的最小乘积和](/solution/1800-1899/1874.Minimize%20Product%20Sum%20of%20Two%20Arrays/README.md) | `贪心`,`数组`,`排序` | 中等 | 🔒 | | [1875](https://leetcode-cn.com/problems/group-employees-of-the-same-salary) | [将工资相同的雇员分组](/solution/1800-1899/1875.Group%20Employees%20of%20the%20Same%20Salary/README.md) | `数据库` | 中等 | 🔒 | | [1876](https://leetcode-cn.com/problems/substrings-of-size-three-with-distinct-characters) | [长度为三且各字符不同的子字符串](/solution/1800-1899/1876.Substrings%20of%20Size%20Three%20with%20Distinct%20Characters/README.md) | `哈希表`,`字符串`,`计数`,`滑动窗口` | 简单 | | | [1877](https://leetcode-cn.com/problems/minimize-maximum-pair-sum-in-array) | [数组中最大数对和的最小值](/solution/1800-1899/1877.Minimize%20Maximum%20Pair%20Sum%20in%20Array/README.md) | `贪心`,`数组`,`双指针`,`排序` | 中等 | | | [1878](https://leetcode-cn.com/problems/get-biggest-three-rhombus-sums-in-a-grid) | [矩阵中最大的三个菱形和](/solution/1800-1899/1878.Get%20Biggest%20Three%20Rhombus%20Sums%20in%20a%20Grid/README.md) | `数组`,`数学`,`矩阵`,`前缀和`,`排序`,`堆（优先队列）` | 中等 | | | [1879](https://leetcode-cn.com/problems/minimum-xor-sum-of-two-arrays) | [两个数组最小的异或值之和](/solution/1800-1899/1879.Minimum%20XOR%20Sum%20of%20Two%20Arrays/README.md) | `位运算`,`数组`,`动态规划`,`状态压缩` | 困难 | | | [1880](https://leetcode-cn.com/problems/check-if-word-equals-summation-of-two-words) | [检查某单词是否等于两单词之和](/solution/1800-1899/1880.Check%20if%20Word%20Equals%20Summation%20of%20Two%20Words/README.md) | `字符串` | 简单 | | | [1881](https://leetcode-cn.com/problems/maximum-value-after-insertion) | [插入后的最大值](/solution/1800-1899/1881.Maximum%20Value%20after%20Insertion/README.md) | `贪心`,`字符串` | 中等 | | | [1882](https://leetcode-cn.com/problems/process-tasks-using-servers) | [使用服务器处理任务](/solution/1800-1899/1882.Process%20Tasks%20Using%20Servers/README.md) | `数组`,`堆（优先队列）` | 中等 | | | [1883](https://leetcode-cn.com/problems/minimum-skips-to-arrive-at-meeting-on-time) | [准时抵达会议现场的最小跳过休息次数](/solution/1800-1899/1883.Minimum%20Skips%20to%20Arrive%20at%20Meeting%20On%20Time/README.md) | `数组`,`动态规划` | 困难 | | | [1884](https://leetcode-cn.com/problems/egg-drop-with-2-eggs-and-n-floors) | [鸡蛋掉落-两枚鸡蛋](/solution/1800-1899/1884.Egg%20Drop%20With%202%20Eggs%20and%20N%20Floors/README.md) | `数学`,`动态规划` | 中等 | | | [1885](https://leetcode-cn.com/problems/count-pairs-in-two-arrays) | [统计数对](/solution/1800-1899/1885.Count%20Pairs%20in%20Two%20Arrays/README.md) | `数组`,`二分查找`,`排序` | 中等 | 🔒 | | [1886](https://leetcode-cn.com/problems/determine-whether-matrix-can-be-obtained-by-rotation) | [判断矩阵经轮转后是否一致](/solution/1800-1899/1886.Determine%20Whether%20Matrix%20Can%20Be%20Obtained%20By%20Rotation/README.md) | `数组`,`矩阵` | 简单 | | | [1887](https://leetcode-cn.com/problems/reduction-operations-to-make-the-array-elements-equal) | [使数组元素相等的减少操作次数](/solution/1800-1899/1887.Reduction%20Operations%20to%20Make%20the%20Array%20Elements%20Equal/README.md) | `数组`,`排序` | 中等 | | | [1888](https://leetcode-cn.com/problems/minimum-number-of-flips-to-make-the-binary-string-alternating) | [使二进制字符串字符交替的最少反转次数](/solution/1800-1899/1888.Minimum%20Number%20of%20Flips%20to%20Make%20the%20Binary%20String%20Alternating/README.md) | `贪心`,`字符串` | 中等 | | | [1889](https://leetcode-cn.com/problems/minimum-space-wasted-from-packaging) | [装包裹的最小浪费空间](/solution/1800-1899/1889.Minimum%20Space%20Wasted%20From%20Packaging/README.md) | `数组`,`二分查找`,`前缀和`,`排序` | 困难 | | | [1890](https://leetcode-cn.com/problems/the-latest-login-in-2020) | [2020 年最后一次登录](/solution/1800-1899/1890.The%20Latest%20Login%20in%202020/README.md) | `数据库` | 简单 | | | [1891](https://leetcode-cn.com/problems/cutting-ribbons) | [割绳子](/solution/1800-1899/1891.Cutting%20Ribbons/README.md) | `数组`,`二分查找` | 中等 | 🔒 | | [1892](https://leetcode-cn.com/problems/page-recommendations-ii) | [页面推荐 Ⅱ](/solution/1800-1899/1892.Page%20Recommendations%20II/README.md) | `数据库` | 困难 | 🔒 | | [1893](https://leetcode-cn.com/problems/check-if-all-the-integers-in-a-range-are-covered) | [检查是否区域内所有整数都被覆盖](/solution/1800-1899/1893.Check%20if%20All%20the%20Integers%20in%20a%20Range%20Are%20Covered/README.md) | `数组`,`哈希表`,`前缀和` | 简单 | | | [1894](https://leetcode-cn.com/problems/find-the-student-that-will-replace-the-chalk) | [找到需要补充粉笔的学生编号](/solution/1800-1899/1894.Find%20the%20Student%20that%20Will%20Replace%20the%20Chalk/README.md) | `数组`,`二分查找`,`前缀和`,`模拟` | 中等 | | | [1895](https://leetcode-cn.com/problems/largest-magic-square) | [最大的幻方](/solution/1800-1899/1895.Largest%20Magic%20Square/README.md) | `数组`,`矩阵`,`前缀和` | 中等 | | | [1896](https://leetcode-cn.com/problems/minimum-cost-to-change-the-final-value-of-expression) | [反转表达式值的最少操作次数](/solution/1800-1899/1896.Minimum%20Cost%20to%20Change%20the%20Final%20Value%20of%20Expression/README.md) | `栈`,`数学`,`字符串`,`动态规划` | 困难 | | | [1897](https://leetcode-cn.com/problems/redistribute-characters-to-make-all-strings-equal) | [重新分配字符使所有字符串都相等](/solution/1800-1899/1897.Redistribute%20Characters%20to%20Make%20All%20Strings%20Equal/README.md) | `哈希表`,`字符串`,`计数` | 简单 | | | [1898](https://leetcode-cn.com/problems/maximum-number-of-removable-characters) | [可移除字符的最大数目](/solution/1800-1899/1898.Maximum%20Number%20of%20Removable%20Characters/README.md) | `数组`,`字符串`,`二分查找` | 中等 | | | [1899](https://leetcode-cn.com/problems/merge-triplets-to-form-target-triplet) | [合并若干三元组以形成目标三元组](/solution/1800-1899/1899.Merge%20Triplets%20to%20Form%20Target%20Triplet/README.md) | `贪心`,`数组` | 中等 | | | [1900](https://leetcode-cn.com/problems/the-earliest-and-latest-rounds-where-players-compete) | [最佳运动员的比拼回合](/solution/1900-1999/1900.The%20Earliest%20and%20Latest%20Rounds%20Where%20Players%20Compete/README.md) | `记忆化搜索`,`动态规划` | 困难 | | | [1901](https://leetcode-cn.com/problems/find-a-peak-element-ii) | [找出顶峰元素 II](/solution/1900-1999/1901.Find%20a%20Peak%20Element%20II/README.md) | `数组`,`二分查找`,`分治`,`矩阵` | 中等 | | | [1902](https://leetcode-cn.com/problems/depth-of-bst-given-insertion-order) | [给定二叉搜索树的插入顺序求深度](/solution/1900-1999/1902.Depth%20of%20BST%20Given%20Insertion%20Order/README.md) | `树`,`二叉搜索树`,`二叉树`,`有序集合` | 中等 | 🔒 | | [1903](https://leetcode-cn.com/problems/largest-odd-number-in-string) | [字符串中的最大奇数](/solution/1900-1999/1903.Largest%20Odd%20Number%20in%20String/README.md) | `贪心`,`数学`,`字符串` | 简单 | | | [1904](https://leetcode-cn.com/problems/the-number-of-full-rounds-you-have-played) | [你完成的完整对局数](/solution/1900-1999/1904.The%20Number%20of%20Full%20Rounds%20You%20Have%20Played/README.md) | `数学`,`字符串` | 中等 | | | [1905](https://leetcode-cn.com/problems/count-sub-islands) | [统计子岛屿](/solution/1900-1999/1905.Count%20Sub%20Islands/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`数组`,`矩阵` | 中等 | | | [1906](https://leetcode-cn.com/problems/minimum-absolute-difference-queries) | [查询差绝对值的最小值](/solution/1900-1999/1906.Minimum%20Absolute%20Difference%20Queries/README.md) | `数组`,`哈希表` | 中等 | | | [1907](https://leetcode-cn.com/problems/count-salary-categories) | [按分类统计薪水](/solution/1900-1999/1907.Count%20Salary%20Categories/README.md) | `数据库` | 中等 | 🔒 | | [1908](https://leetcode-cn.com/problems/game-of-nim) | [Nim 游戏 II](/solution/1900-1999/1908.Game%20of%20Nim/README.md) | `位运算`,`脑筋急转弯`,`数组`,`数学`,`动态规划`,`博弈` | 中等 | 🔒 | | [1909](https://leetcode-cn.com/problems/remove-one-element-to-make-the-array-strictly-increasing) | [删除一个元素使数组严格递增](/solution/1900-1999/1909.Remove%20One%20Element%20to%20Make%20the%20Array%20Strictly%20Increasing/README.md) | `数组` | 简单 | | | [1910](https://leetcode-cn.com/problems/remove-all-occurrences-of-a-substring) | [删除一个字符串中所有出现的给定子字符串](/solution/1900-1999/1910.Remove%20All%20Occurrences%20of%20a%20Substring/README.md) | `字符串` | 中等 | | | [1911](https://leetcode-cn.com/problems/maximum-alternating-subsequence-sum) | [最大子序列交替和](/solution/1900-1999/1911.Maximum%20Alternating%20Subsequence%20Sum/README.md) | `数组`,`动态规划` | 中等 | | | [1912](https://leetcode-cn.com/problems/design-movie-rental-system) | [设计电影租借系统](/solution/1900-1999/1912.Design%20Movie%20Rental%20System/README.md) | `设计`,`数组`,`哈希表`,`有序集合`,`堆（优先队列）` | 困难 | | | [1913](https://leetcode-cn.com/problems/maximum-product-difference-between-two-pairs) | [两个数对之间的最大乘积差](/solution/1900-1999/1913.Maximum%20Product%20Difference%20Between%20Two%20Pairs/README.md) | `数组`,`排序` | 简单 | | | [1914](https://leetcode-cn.com/problems/cyclically-rotating-a-grid) | [循环轮转矩阵](/solution/1900-1999/1914.Cyclically%20Rotating%20a%20Grid/README.md) | `数组`,`矩阵`,`模拟` | 中等 | | | [1915](https://leetcode-cn.com/problems/number-of-wonderful-substrings) | [最美子字符串的数目](/solution/1900-1999/1915.Number%20of%20Wonderful%20Substrings/README.md) | `位运算`,`哈希表`,`字符串`,`前缀和` | 中等 | | | [1916](https://leetcode-cn.com/problems/count-ways-to-build-rooms-in-an-ant-colony) | [统计为蚁群构筑房间的不同顺序](/solution/1900-1999/1916.Count%20Ways%20to%20Build%20Rooms%20in%20an%20Ant%20Colony/README.md) | `树`,`图`,`拓扑排序`,`数学`,`动态规划`,`组合数学` | 困难 | | | [1917](https://leetcode-cn.com/problems/leetcodify-friends-recommendations) | [Leetcodify 好友推荐](/solution/1900-1999/1917.Leetcodify%20Friends%20Recommendations/README.md) | `数据库` | 困难 | 🔒 | | [1918](https://leetcode-cn.com/problems/kth-smallest-subarray-sum) | [第 K 小的子数组和·](/solution/1900-1999/1918.Kth%20Smallest%20Subarray%20Sum/README.md) | `数组`,`二分查找`,`滑动窗口` | 中等 | 🔒 | | [1919](https://leetcode-cn.com/problems/leetcodify-similar-friends) | [兴趣相同的朋友](/solution/1900-1999/1919.Leetcodify%20Similar%20Friends/README.md) | `数据库` | 困难 | 🔒 | | [1920](https://leetcode-cn.com/problems/build-array-from-permutation) | [基于排列构建数组](/solution/1900-1999/1920.Build%20Array%20from%20Permutation/README.md) | `数组`,`模拟` | 简单 | | | [1921](https://leetcode-cn.com/problems/eliminate-maximum-number-of-monsters) | [消灭怪物的最大数量](/solution/1900-1999/1921.Eliminate%20Maximum%20Number%20of%20Monsters/README.md) | `贪心`,`数组`,`排序` | 中等 | | | [1922](https://leetcode-cn.com/problems/count-good-numbers) | [统计好数字的数目](/solution/1900-1999/1922.Count%20Good%20Numbers/README.md) | `递归`,`数学` | 中等 | | | [1923](https://leetcode-cn.com/problems/longest-common-subpath) | [最长公共子路径](/solution/1900-1999/1923.Longest%20Common%20Subpath/README.md) | `数组`,`二分查找`,`后缀数组`,`哈希函数`,`滚动哈希` | 困难 | | | [1924](https://leetcode-cn.com/problems/erect-the-fence-ii) | [安装栅栏 II](/solution/1900-1999/1924.Erect%20the%20Fence%20II/README.md) | `几何`,`数组`,`数学` | 困难 | 🔒 | | [1925](https://leetcode-cn.com/problems/count-square-sum-triples) | [统计平方和三元组的数目](/solution/1900-1999/1925.Count%20Square%20Sum%20Triples/README.md) | `数学`,`枚举` | 简单 | | | [1926](https://leetcode-cn.com/problems/nearest-exit-from-entrance-in-maze) | [迷宫中离入口最近的出口](/solution/1900-1999/1926.Nearest%20Exit%20from%20Entrance%20in%20Maze/README.md) | `广度优先搜索`,`数组`,`矩阵` | 中等 | | | [1927](https://leetcode-cn.com/problems/sum-game) | [求和游戏](/solution/1900-1999/1927.Sum%20Game/README.md) | `贪心`,`数学`,`博弈` | 中等 | | | [1928](https://leetcode-cn.com/problems/minimum-cost-to-reach-destination-in-time) | [规定时间内到达终点的最小花费](/solution/1900-1999/1928.Minimum%20Cost%20to%20Reach%20Destination%20in%20Time/README.md) | `图`,`动态规划` | 困难 | | | [1929](https://leetcode-cn.com/problems/concatenation-of-array) | [数组串联](/solution/1900-1999/1929.Concatenation%20of%20Array/README.md) | `数组` | 简单 | | | [1930](https://leetcode-cn.com/problems/unique-length-3-palindromic-subsequences) | [长度为 3 的不同回文子序列](/solution/1900-1999/1930.Unique%20Length-3%20Palindromic%20Subsequences/README.md) | `哈希表`,`字符串`,`前缀和` | 中等 | | | [1931](https://leetcode-cn.com/problems/painting-a-grid-with-three-different-colors) | [用三种不同颜色为网格涂色](/solution/1900-1999/1931.Painting%20a%20Grid%20With%20Three%20Different%20Colors/README.md) | `动态规划` | 困难 | | | [1932](https://leetcode-cn.com/problems/merge-bsts-to-create-single-bst) | [合并多棵二叉搜索树](/solution/1900-1999/1932.Merge%20BSTs%20to%20Create%20Single%20BST/README.md) | `树`,`深度优先搜索`,`哈希表`,`二分查找`,`二叉树` | 困难 | | | [1933](https://leetcode-cn.com/problems/check-if-string-is-decomposable-into-value-equal-substrings) | [判断字符串是否可分解为值均等的子串](/solution/1900-1999/1933.Check%20if%20String%20Is%20Decomposable%20Into%20Value-Equal%20Substrings/README.md) | `字符串` | 简单 | 🔒 | | [1934](https://leetcode-cn.com/problems/confirmation-rate) | [确认率](/solution/1900-1999/1934.Confirmation%20Rate/README.md) | `数据库` | 中等 | 🔒 | | [1935](https://leetcode-cn.com/problems/maximum-number-of-words-you-can-type) | [可以输入的最大单词数](/solution/1900-1999/1935.Maximum%20Number%20of%20Words%20You%20Can%20Type/README.md) | `哈希表`,`字符串` | 简单 | | | [1936](https://leetcode-cn.com/problems/add-minimum-number-of-rungs) | [新增的最少台阶数](/solution/1900-1999/1936.Add%20Minimum%20Number%20of%20Rungs/README.md) | `贪心`,`数组` | 中等 | | | [1937](https://leetcode-cn.com/problems/maximum-number-of-points-with-cost) | [扣分后的最大得分](/solution/1900-1999/1937.Maximum%20Number%20of%20Points%20with%20Cost/README.md) | | 中等 | | | [1938](https://leetcode-cn.com/problems/maximum-genetic-difference-query) | [查询最大基因差](/solution/1900-1999/1938.Maximum%20Genetic%20Difference%20Query/README.md) | | 困难 | | | [1939](https://leetcode-cn.com/problems/users-that-actively-request-confirmation-messages) | [主动请求确认消息的用户](/solution/1900-1999/1939.Users%20That%20Actively%20Request%20Confirmation%20Messages/README.md) | `数据库` | 简单 | 🔒 | | [1940](https://leetcode-cn.com/problems/longest-common-subsequence-between-sorted-arrays) | [排序数组之间的最长公共子序列](/solution/1900-1999/1940.Longest%20Common%20Subsequence%20Between%20Sorted%20Arrays/README.md) | `数组`,`哈希表`,`计数` | 中等 | 🔒 | | [1941](https://leetcode-cn.com/problems/check-if-all-characters-have-equal-number-of-occurrences) | [检查是否所有字符出现次数相同](/solution/1900-1999/1941.Check%20if%20All%20Characters%20Have%20Equal%20Number%20of%20Occurrences/README.md) | `哈希表`,`字符串`,`计数` | 简单 | | | [1942](https://leetcode-cn.com/problems/the-number-of-the-smallest-unoccupied-chair) | [最小未被占据椅子的编号](/solution/1900-1999/1942.The%20Number%20of%20the%20Smallest%20Unoccupied%20Chair/README.md) | `数组`,`有序集合`,`堆（优先队列）` | 中等 | | | [1943](https://leetcode-cn.com/problems/describe-the-painting) | [描述绘画结果](/solution/1900-1999/1943.Describe%20the%20Painting/README.md) | `数组`,`前缀和` | 中等 | | | [1944](https://leetcode-cn.com/problems/number-of-visible-people-in-a-queue) | [队列中可以看到的人数](/solution/1900-1999/1944.Number%20of%20Visible%20People%20in%20a%20Queue/README.md) | `栈`,`数组`,`单调栈` | 困难 | | | [1945](https://leetcode-cn.com/problems/sum-of-digits-of-string-after-convert) | [字符串转化后的各位数字之和](/solution/1900-1999/1945.Sum%20of%20Digits%20of%20String%20After%20Convert/README.md) | `字符串`,`模拟` | 简单 | | | [1946](https://leetcode-cn.com/problems/largest-number-after-mutating-substring) | [子字符串突变后可能得到的最大整数](/solution/1900-1999/1946.Largest%20Number%20After%20Mutating%20Substring/README.md) | `贪心`,`数组`,`字符串` | 中等 | | | [1947](https://leetcode-cn.com/problems/maximum-compatibility-score-sum) | [最大兼容性评分和](/solution/1900-1999/1947.Maximum%20Compatibility%20Score%20Sum/README.md) | `位运算`,`数组`,`动态规划`,`回溯`,`状态压缩` | 中等 | | | [1948](https://leetcode-cn.com/problems/delete-duplicate-folders-in-system) | [删除系统中的重复文件夹](/solution/1900-1999/1948.Delete%20Duplicate%20Folders%20in%20System/README.md) | `字典树`,`数组`,`哈希表`,`字符串`,`哈希函数` | 困难 | | | [1949](https://leetcode-cn.com/problems/strong-friendship) | [坚定的友谊](/solution/1900-1999/1949.Strong%20Friendship/README.md) | `数据库` | 中等 | 🔒 | | [1950](https://leetcode-cn.com/problems/maximum-of-minimum-values-in-all-subarrays) | [所有子数组最小值中的最大值](/solution/1900-1999/1950.Maximum%20of%20Minimum%20Values%20in%20All%20Subarrays/README.md) | `栈`,`数组`,`单调栈` | 中等 | 🔒 | | [1951](https://leetcode-cn.com/problems/all-the-pairs-with-the-maximum-number-of-common-followers) | [查询具有最多共同关注者的所有两两结对组](/solution/1900-1999/1951.All%20the%20Pairs%20With%20the%20Maximum%20Number%20of%20Common%20Followers/README.md) | `数据库` | 中等 | 🔒 | | [1952](https://leetcode-cn.com/problems/three-divisors) | [三除数](/solution/1900-1999/1952.Three%20Divisors/README.md) | `数学` | 简单 | | | [1953](https://leetcode-cn.com/problems/maximum-number-of-weeks-for-which-you-can-work) | [你可以工作的最大周数](/solution/1900-1999/1953.Maximum%20Number%20of%20Weeks%20for%20Which%20You%20Can%20Work/README.md) | `贪心`,`数组` | 中等 | | | [1954](https://leetcode-cn.com/problems/minimum-garden-perimeter-to-collect-enough-apples) | [收集足够苹果的最小花园周长](/solution/1900-1999/1954.Minimum%20Garden%20Perimeter%20to%20Collect%20Enough%20Apples/README.md) | `数学`,`二分查找` | 中等 | | | [1955](https://leetcode-cn.com/problems/count-number-of-special-subsequences) | [统计特殊子序列的数目](/solution/1900-1999/1955.Count%20Number%20of%20Special%20Subsequences/README.md) | `数组`,`动态规划` | 困难 | | | [1956](https://leetcode-cn.com/problems/minimum-time-for-k-virus-variants-to-spread) | [感染 K 种病毒所需的最短时间](/solution/1900-1999/1956.Minimum%20Time%20For%20K%20Virus%20Variants%20to%20Spread/README.md) | `几何`,`数组`,`数学`,`二分查找`,`枚举` | 困难 | 🔒 | | [1957](https://leetcode-cn.com/problems/delete-characters-to-make-fancy-string) | [删除字符使字符串变好](/solution/1900-1999/1957.Delete%20Characters%20to%20Make%20Fancy%20String/README.md) | `字符串` | 简单 | | | [1958](https://leetcode-cn.com/problems/check-if-move-is-legal) | [检查操作是否合法](/solution/1900-1999/1958.Check%20if%20Move%20is%20Legal/README.md) | `数组`,`枚举`,`矩阵` | 中等 | | | [1959](https://leetcode-cn.com/problems/minimum-total-space-wasted-with-k-resizing-operations) | [K 次调整数组大小浪费的最小总空间](/solution/1900-1999/1959.Minimum%20Total%20Space%20Wasted%20With%20K%20Resizing%20Operations/README.md) | `数组`,`动态规划` | 中等 | | | [1960](https://leetcode-cn.com/problems/maximum-product-of-the-length-of-two-palindromic-substrings) | [两个回文子字符串长度的最大乘积](/solution/1900-1999/1960.Maximum%20Product%20of%20the%20Length%20of%20Two%20Palindromic%20Substrings/README.md) | `字符串`,`哈希函数`,`滚动哈希` | 困难 | | | [1961](https://leetcode-cn.com/problems/check-if-string-is-a-prefix-of-array) | [检查字符串是否为数组前缀](/solution/1900-1999/1961.Check%20If%20String%20Is%20a%20Prefix%20of%20Array/README.md) | `数组`,`字符串` | 简单 | | | [1962](https://leetcode-cn.com/problems/remove-stones-to-minimize-the-total) | [移除石子使总数最小](/solution/1900-1999/1962.Remove%20Stones%20to%20Minimize%20the%20Total/README.md) | `数组`,`堆（优先队列）` | 中等 | | | [1963](https://leetcode-cn.com/problems/minimum-number-of-swaps-to-make-the-string-balanced) | [使字符串平衡的最小交换次数](/solution/1900-1999/1963.Minimum%20Number%20of%20Swaps%20to%20Make%20the%20String%20Balanced/README.md) | `栈`,`贪心`,`双指针`,`字符串` | 中等 | | | [1964](https://leetcode-cn.com/problems/find-the-longest-valid-obstacle-course-at-each-position) | [找出到每个位置为止最长的有效障碍赛跑路线](/solution/1900-1999/1964.Find%20the%20Longest%20Valid%20Obstacle%20Course%20at%20Each%20Position/README.md) | `树状数组`,`数组`,`二分查找` | 困难 | | | [1965](https://leetcode-cn.com/problems/employees-with-missing-information) | [丢失信息的雇员](/solution/1900-1999/1965.Employees%20With%20Missing%20Information/README.md) | `数据库` | 简单 | | | [1966](https://leetcode-cn.com/problems/binary-searchable-numbers-in-an-unsorted-array) | [未排序数组中的可被二分搜索的数](/solution/1900-1999/1966.Binary%20Searchable%20Numbers%20in%20an%20Unsorted%20Array/README.md) | | 中等 | 🔒 | | [1967](https://leetcode-cn.com/problems/number-of-strings-that-appear-as-substrings-in-word) | [作为子字符串出现在单词中的字符串数目](/solution/1900-1999/1967.Number%20of%20Strings%20That%20Appear%20as%20Substrings%20in%20Word/README.md) | `字符串` | 简单 | | | [1968](https://leetcode-cn.com/problems/array-with-elements-not-equal-to-average-of-neighbors) | [构造元素不等于两相邻元素平均值的数组](/solution/1900-1999/1968.Array%20With%20Elements%20Not%20Equal%20to%20Average%20of%20Neighbors/README.md) | `贪心`,`数组`,`排序` | 中等 | | | [1969](https://leetcode-cn.com/problems/minimum-non-zero-product-of-the-array-elements) | [数组元素的最小非零乘积](/solution/1900-1999/1969.Minimum%20Non-Zero%20Product%20of%20the%20Array%20Elements/README.md) | `贪心`,`递归`,`数学` | 中等 | | | [1970](https://leetcode-cn.com/problems/last-day-where-you-can-still-cross) | [你能穿过矩阵的最后一天](/solution/1900-1999/1970.Last%20Day%20Where%20You%20Can%20Still%20Cross/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`数组`,`二分查找`,`矩阵` | 困难 | | | [1971](https://leetcode-cn.com/problems/find-if-path-exists-in-graph) | [寻找图中是否存在路径](/solution/1900-1999/1971.Find%20if%20Path%20Exists%20in%20Graph/README.md) | `深度优先搜索`,`广度优先搜索`,`图` | 简单 | | | [1972](https://leetcode-cn.com/problems/first-and-last-call-on-the-same-day) | [同一天的第一个电话和最后一个电话](/solution/1900-1999/1972.First%20and%20Last%20Call%20On%20the%20Same%20Day/README.md) | `数据库` | 困难 | 🔒 | | [1973](https://leetcode-cn.com/problems/count-nodes-equal-to-sum-of-descendants) | [值等于子节点值之和的节点数量](/solution/1900-1999/1973.Count%20Nodes%20Equal%20to%20Sum%20of%20Descendants/README.md) | | 中等 | 🔒 | | [1974](https://leetcode-cn.com/problems/minimum-time-to-type-word-using-special-typewriter) | [使用特殊打字机键入单词的最少时间](/solution/1900-1999/1974.Minimum%20Time%20to%20Type%20Word%20Using%20Special%20Typewriter/README.md) | `贪心`,`字符串` | 简单 | | | [1975](https://leetcode-cn.com/problems/maximum-matrix-sum) | [最大方阵和](/solution/1900-1999/1975.Maximum%20Matrix%20Sum/README.md) | `贪心`,`数组`,`矩阵` | 中等 | | | [1976](https://leetcode-cn.com/problems/number-of-ways-to-arrive-at-destination) | [到达目的地的方案数](/solution/1900-1999/1976.Number%20of%20Ways%20to%20Arrive%20at%20Destination/README.md) | `图`,`拓扑排序`,`动态规划`,`最短路` | 中等 | | | [1977](https://leetcode-cn.com/problems/number-of-ways-to-separate-numbers) | [划分数字的方案数](/solution/1900-1999/1977.Number%20of%20Ways%20to%20Separate%20Numbers/README.md) | `字符串`,`动态规划`,`后缀数组` | 困难 | | | [1978](https://leetcode-cn.com/problems/employees-whose-manager-left-the-company) | [上级经理已离职的公司员工](/solution/1900-1999/1978.Employees%20Whose%20Manager%20Left%20the%20Company/README.md) | | 简单 | 🔒 | | [1979](https://leetcode-cn.com/problems/find-greatest-common-divisor-of-array) | [找出数组的最大公约数](/solution/1900-1999/1979.Find%20Greatest%20Common%20Divisor%20of%20Array/README.md) | `数组`,`数学`,`数论` | 简单 | | | [1980](https://leetcode-cn.com/problems/find-unique-binary-string) | [找出不同的二进制字符串](/solution/1900-1999/1980.Find%20Unique%20Binary%20String/README.md) | `数组`,`字符串`,`回溯` | 中等 | | | [1981](https://leetcode-cn.com/problems/minimize-the-difference-between-target-and-chosen-elements) | [最小化目标值与所选元素的差](/solution/1900-1999/1981.Minimize%20the%20Difference%20Between%20Target%20and%20Chosen%20Elements/README.md) | `数组`,`动态规划`,`矩阵` | 中等 | | | [1982](https://leetcode-cn.com/problems/find-array-given-subset-sums) | [从子集的和还原数组](/solution/1900-1999/1982.Find%20Array%20Given%20Subset%20Sums/README.md) | `数组`,`分治` | 困难 | | | [1983](https://leetcode-cn.com/problems/widest-pair-of-indices-with-equal-range-sum) | [范围和相等的最宽索引对](/solution/1900-1999/1983.Widest%20Pair%20of%20Indices%20With%20Equal%20Range%20Sum/README.md) | | 中等 | 🔒 | | [1984](https://leetcode-cn.com/problems/minimum-difference-between-highest-and-lowest-of-k-scores) | [学生分数的最小差值](/solution/1900-1999/1984.Minimum%20Difference%20Between%20Highest%20and%20Lowest%20of%20K%20Scores/README.md) | `数组`,`排序`,`滑动窗口` | 简单 | | | [1985](https://leetcode-cn.com/problems/find-the-kth-largest-integer-in-the-array) | [找出数组中的第 K 大整数](/solution/1900-1999/1985.Find%20the%20Kth%20Largest%20Integer%20in%20the%20Array/README.md) | `数组`,`字符串`,`分治`,`快速选择`,`排序`,`堆（优先队列）` | 中等 | | | [1986](https://leetcode-cn.com/problems/minimum-number-of-work-sessions-to-finish-the-tasks) | [完成任务的最少工作时间段](/solution/1900-1999/1986.Minimum%20Number%20of%20Work%20Sessions%20to%20Finish%20the%20Tasks/README.md) | `位运算`,`数组`,`动态规划`,`回溯`,`状态压缩` | 中等 | | | [1987](https://leetcode-cn.com/problems/number-of-unique-good-subsequences) | [不同的好子序列数目](/solution/1900-1999/1987.Number%20of%20Unique%20Good%20Subsequences/README.md) | `字符串`,`动态规划` | 困难 | | | [1988](https://leetcode-cn.com/problems/find-cutoff-score-for-each-school) | [找出每所学校的最低分数要求](/solution/1900-1999/1988.Find%20Cutoff%20Score%20for%20Each%20School/README.md) | | 中等 | 🔒 | | [1989](https://leetcode-cn.com/problems/maximum-number-of-people-that-can-be-caught-in-tag) | [Maximum Number of People That Can Be Caught in Tag](/solution/1900-1999/1989.Maximum%20Number%20of%20People%20That%20Can%20Be%20Caught%20in%20Tag/README.md) | | 中等 | 🔒 | | [1990](https://leetcode-cn.com/problems/count-the-number-of-experiments) | [统计实验的数量](/solution/1900-1999/1990.Count%20the%20Number%20of%20Experiments/README.md) | | 简单 | 🔒 | | [1991](https://leetcode-cn.com/problems/find-the-middle-index-in-array) | [找到数组的中间位置](/solution/1900-1999/1991.Find%20the%20Middle%20Index%20in%20Array/README.md) | `数组`,`前缀和` | 简单 | | | [1992](https://leetcode-cn.com/problems/find-all-groups-of-farmland) | [找到所有的农场组](/solution/1900-1999/1992.Find%20All%20Groups%20of%20Farmland/README.md) | `深度优先搜索`,`广度优先搜索`,`数组`,`矩阵` | 中等 | | | [1993](https://leetcode-cn.com/problems/operations-on-tree) | [树上的操作](/solution/1900-1999/1993.Operations%20on%20Tree/README.md) | `树`,`广度优先搜索`,`设计`,`哈希表` | 中等 | | | [1994](https://leetcode-cn.com/problems/the-number-of-good-subsets) | [好子集的数目](/solution/1900-1999/1994.The%20Number%20of%20Good%20Subsets/README.md) | `位运算`,`数组`,`数学`,`动态规划`,`状态压缩` | 困难 | | | [1995](https://leetcode-cn.com/problems/count-special-quadruplets) | [统计特殊四元组](/solution/1900-1999/1995.Count%20Special%20Quadruplets/README.md) | `数组`,`枚举` | 简单 | | | [1996](https://leetcode-cn.com/problems/the-number-of-weak-characters-in-the-game) | [游戏中弱角色的数量](/solution/1900-1999/1996.The%20Number%20of%20Weak%20Characters%20in%20the%20Game/README.md) | `栈`,`贪心`,`数组`,`排序`,`单调栈` | 中等 | | | [1997](https://leetcode-cn.com/problems/first-day-where-you-have-been-in-all-the-rooms) | [访问完所有房间的第一天](/solution/1900-1999/1997.First%20Day%20Where%20You%20Have%20Been%20in%20All%20the%20Rooms/README.md) | `数组`,`动态规划` | 中等 | | | [1998](https://leetcode-cn.com/problems/gcd-sort-of-an-array) | [数组的最大公因数排序](/solution/1900-1999/1998.GCD%20Sort%20of%20an%20Array/README.md) | `并查集`,`数组`,`数学`,`排序` | 困难 | | | [1999](https://leetcode-cn.com/problems/smallest-greater-multiple-made-of-two-digits) | [最小的仅由两个数组成的倍数](/solution/1900-1999/1999.Smallest%20Greater%20Multiple%20Made%20of%20Two%20Digits/README.md) | | 中等 | 🔒 | | [2000](https://leetcode-cn.com/problems/reverse-prefix-of-word) | [反转单词前缀](/solution/2000-2099/2000.Reverse%20Prefix%20of%20Word/README.md) | `双指针`,`字符串` | 简单 | | | [2001](https://leetcode-cn.com/problems/number-of-pairs-of-interchangeable-rectangles) | [可互换矩形的组数](/solution/2000-2099/2001.Number%20of%20Pairs%20of%20Interchangeable%20Rectangles/README.md) | `数组`,`哈希表`,`数学`,`计数`,`数论` | 中等 | | | [2002](https://leetcode-cn.com/problems/maximum-product-of-the-length-of-two-palindromic-subsequences) | [两个回文子序列长度的最大乘积](/solution/2000-2099/2002.Maximum%20Product%20of%20the%20Length%20of%20Two%20Palindromic%20Subsequences/README.md) | `位运算`,`字符串`,`动态规划`,`回溯`,`状态压缩` | 中等 | | | [2003](https://leetcode-cn.com/problems/smallest-missing-genetic-value-in-each-subtree) | [每棵子树内缺失的最小基因值](/solution/2000-2099/2003.Smallest%20Missing%20Genetic%20Value%20in%20Each%20Subtree/README.md) | `树`,`深度优先搜索`,`并查集`,`动态规划` | 困难 | | | [2004](https://leetcode-cn.com/problems/the-number-of-seniors-and-juniors-to-join-the-company) | [职员招聘人数](/solution/2000-2099/2004.The%20Number%20of%20Seniors%20and%20Juniors%20to%20Join%20the%20Company/README.md) | | 困难 | 🔒 | | [2005](https://leetcode-cn.com/problems/subtree-removal-game-with-fibonacci-tree) | [斐波那契树的移除子树游戏](/solution/2000-2099/2005.Subtree%20Removal%20Game%20with%20Fibonacci%20Tree/README.md) | | 困难 | 🔒 | | [2006](https://leetcode-cn.com/problems/count-number-of-pairs-with-absolute-difference-k) | [差的绝对值为 K 的数对数目](/solution/2000-2099/2006.Count%20Number%20of%20Pairs%20With%20Absolute%20Difference%20K/README.md) | `数组`,`哈希表`,`计数` | 简单 | | | [2007](https://leetcode-cn.com/problems/find-original-array-from-doubled-array) | [从双倍数组中还原原数组](/solution/2000-2099/2007.Find%20Original%20Array%20From%20Doubled%20Array/README.md) | `贪心`,`数组`,`哈希表`,`排序` | 中等 | | | [2008](https://leetcode-cn.com/problems/maximum-earnings-from-taxi) | [出租车的最大盈利](/solution/2000-2099/2008.Maximum%20Earnings%20From%20Taxi/README.md) | `数组`,`二分查找`,`动态规划`,`排序` | 中等 | | | [2009](https://leetcode-cn.com/problems/minimum-number-of-operations-to-make-array-continuous) | [使数组连续的最少操作数](/solution/2000-2099/2009.Minimum%20Number%20of%20Operations%20to%20Make%20Array%20Continuous/README.md) | `数组`,`二分查找` | 困难 | | | [2010](https://leetcode-cn.com/problems/the-number-of-seniors-and-juniors-to-join-the-company-ii) | [职员招聘人数 II](/solution/2000-2099/2010.The%20Number%20of%20Seniors%20and%20Juniors%20to%20Join%20the%20Company%20II/README.md) | | 困难 | 🔒 | | [2011](https://leetcode-cn.com/problems/final-value-of-variable-after-performing-operations) | [执行操作后的变量值](/solution/2000-2099/2011.Final%20Value%20of%20Variable%20After%20Performing%20Operations/README.md) | `数组`,`字符串`,`模拟` | 简单 | | | [2012](https://leetcode-cn.com/problems/sum-of-beauty-in-the-array) | [数组美丽值求和](/solution/2000-2099/2012.Sum%20of%20Beauty%20in%20the%20Array/README.md) | `数组` | 中等 | | | [2013](https://leetcode-cn.com/problems/detect-squares) | [检测正方形](/solution/2000-2099/2013.Detect%20Squares/README.md) | `设计`,`数组`,`哈希表`,`计数` | 中等 | | | [2014](https://leetcode-cn.com/problems/longest-subsequence-repeated-k-times) | [重复 K 次的最长子序列](/solution/2000-2099/2014.Longest%20Subsequence%20Repeated%20k%20Times/README.md) | `贪心`,`字符串`,`回溯`,`计数`,`枚举` | 困难 | | | [2015](https://leetcode-cn.com/problems/average-height-of-buildings-in-each-segment) | [每段建筑物的平均高度](/solution/2000-2099/2015.Average%20Height%20of%20Buildings%20in%20Each%20Segment/README.md) | `贪心`,`数组`,`排序`,`堆（优先队列）` | 中等 | 🔒 | | [2016](https://leetcode-cn.com/problems/maximum-difference-between-increasing-elements) | [增量元素之间的最大差值](/solution/2000-2099/2016.Maximum%20Difference%20Between%20Increasing%20Elements/README.md) | `数组` | 简单 | | | [2017](https://leetcode-cn.com/problems/grid-game) | [网格游戏](/solution/2000-2099/2017.Grid%20Game/README.md) | `数组`,`矩阵`,`前缀和` | 中等 | | | [2018](https://leetcode-cn.com/problems/check-if-word-can-be-placed-in-crossword) | [判断单词是否能放入填字游戏内](/solution/2000-2099/2018.Check%20if%20Word%20Can%20Be%20Placed%20In%20Crossword/README.md) | `数组`,`枚举`,`矩阵` | 中等 | | | [2019](https://leetcode-cn.com/problems/the-score-of-students-solving-math-expression) | [解出数学表达式的学生分数](/solution/2000-2099/2019.The%20Score%20of%20Students%20Solving%20Math%20Expression/README.md) | `栈`,`记忆化搜索`,`数组`,`数学`,`字符串`,`动态规划` | 困难 | | | [2020](https://leetcode-cn.com/problems/number-of-accounts-that-did-not-stream) | [无流量的帐户数](/solution/2000-2099/2020.Number%20of%20Accounts%20That%20Did%20Not%20Stream/README.md) | `数据库` | 中等 | 🔒 | | [2021](https://leetcode-cn.com/problems/brightest-position-on-street) | [街上最亮的位置](/solution/2000-2099/2021.Brightest%20Position%20on%20Street/README.md) | `数组`,`有序集合`,`前缀和` | 中等 | 🔒 | | [2022](https://leetcode-cn.com/problems/convert-1d-array-into-2d-array) | [将一维数组转变成二维数组](/solution/2000-2099/2022.Convert%201D%20Array%20Into%202D%20Array/README.md) | `数组`,`矩阵`,`模拟` | 简单 | | | [2023](https://leetcode-cn.com/problems/number-of-pairs-of-strings-with-concatenation-equal-to-target) | [连接后等于目标字符串的字符串对](/solution/2000-2099/2023.Number%20of%20Pairs%20of%20Strings%20With%20Concatenation%20Equal%20to%20Target/README.md) | `数组`,`字符串` | 中等 | | | [2024](https://leetcode-cn.com/problems/maximize-the-confusion-of-an-exam) | [考试的最大困扰度](/solution/2000-2099/2024.Maximize%20the%20Confusion%20of%20an%20Exam/README.md) | `字符串`,`二分查找`,`前缀和`,`滑动窗口` | 中等 | | | [2025](https://leetcode-cn.com/problems/maximum-number-of-ways-to-partition-an-array) | [分割数组的最多方案数](/solution/2000-2099/2025.Maximum%20Number%20of%20Ways%20to%20Partition%20an%20Array/README.md) | `数组`,`哈希表`,`计数`,`枚举`,`前缀和` | 困难 | | | [2026](https://leetcode-cn.com/problems/low-quality-problems) | [低质量的问题](/solution/2000-2099/2026.Low-Quality%20Problems/README.md) | `数据库` | 简单 | 🔒 | | [2027](https://leetcode-cn.com/problems/minimum-moves-to-convert-string) | [转换字符串的最少操作次数](/solution/2000-2099/2027.Minimum%20Moves%20to%20Convert%20String/README.md) | `贪心`,`字符串` | 简单 | | | [2028](https://leetcode-cn.com/problems/find-missing-observations) | [找出缺失的观测数据](/solution/2000-2099/2028.Find%20Missing%20Observations/README.md) | `数组`,`数学`,`模拟` | 中等 | | | [2029](https://leetcode-cn.com/problems/stone-game-ix) | [石子游戏 IX](/solution/2000-2099/2029.Stone%20Game%20IX/README.md) | `贪心`,`数组`,`数学`,`计数`,`博弈` | 中等 | | | [2030](https://leetcode-cn.com/problems/smallest-k-length-subsequence-with-occurrences-of-a-letter) | [含特定字母的最小子序列](/solution/2000-2099/2030.Smallest%20K-Length%20Subsequence%20With%20Occurrences%20of%20a%20Letter/README.md) | `栈`,`贪心`,`字符串`,`单调栈` | 困难 | | | [2031](https://leetcode-cn.com/problems/count-subarrays-with-more-ones-than-zeros) | [1 比 0 多的子数组个数](/solution/2000-2099/2031.Count%20Subarrays%20With%20More%20Ones%20Than%20Zeros/README.md) | `树状数组`,`线段树`,`数组`,`二分查找`,`分治`,`有序集合`,`归并排序` | 中等 | 🔒 | | [2032](https://leetcode-cn.com/problems/two-out-of-three) | [至少在两个数组中出现的值](/solution/2000-2099/2032.Two%20Out%20of%20Three/README.md) | `数组`,`哈希表` | 简单 | | | [2033](https://leetcode-cn.com/problems/minimum-operations-to-make-a-uni-value-grid) | [获取单值网格的最小操作数](/solution/2000-2099/2033.Minimum%20Operations%20to%20Make%20a%20Uni-Value%20Grid/README.md) | `数组`,`数学`,`矩阵`,`排序` | 中等 | | | [2034](https://leetcode-cn.com/problems/stock-price-fluctuation) | [股票价格波动](/solution/2000-2099/2034.Stock%20Price%20Fluctuation/README.md) | `设计`,`哈希表`,`数据流`,`有序集合`,`堆（优先队列）` | 中等 | | | [2035](https://leetcode-cn.com/problems/partition-array-into-two-arrays-to-minimize-sum-difference) | [将数组分成两个数组并最小化数组和的差](/solution/2000-2099/2035.Partition%20Array%20Into%20Two%20Arrays%20to%20Minimize%20Sum%20Difference/README.md) | `位运算`,`数组`,`双指针`,`二分查找`,`动态规划`,`状态压缩`,`有序集合` | 困难 | | | [2036](https://leetcode-cn.com/problems/maximum-alternating-subarray-sum) | [最大交替子数组和](/solution/2000-2099/2036.Maximum%20Alternating%20Subarray%20Sum/README.md) | `数组`,`动态规划` | 中等 | 🔒 | | [2037](https://leetcode-cn.com/problems/minimum-number-of-moves-to-seat-everyone) | [使每位学生都有座位的最少移动次数](/solution/2000-2099/2037.Minimum%20Number%20of%20Moves%20to%20Seat%20Everyone/README.md) | `数组`,`排序` | 简单 | | | [2038](https://leetcode-cn.com/problems/remove-colored-pieces-if-both-neighbors-are-the-same-color) | [如果相邻两个颜色均相同则删除当前颜色](/solution/2000-2099/2038.Remove%20Colored%20Pieces%20if%20Both%20Neighbors%20are%20the%20Same%20Color/README.md) | `贪心`,`数学`,`字符串`,`博弈` | 中等 | | | [2039](https://leetcode-cn.com/problems/the-time-when-the-network-becomes-idle) | [网络空闲的时刻](/solution/2000-2099/2039.The%20Time%20When%20the%20Network%20Becomes%20Idle/README.md) | `广度优先搜索`,`图`,`数组` | 中等 | | | [2040](https://leetcode-cn.com/problems/kth-smallest-product-of-two-sorted-arrays) | [两个有序数组的第 K 小乘积](/solution/2000-2099/2040.Kth%20Smallest%20Product%20of%20Two%20Sorted%20Arrays/README.md) | `数组`,`二分查找` | 困难 | | | [2041](https://leetcode-cn.com/problems/accepted-candidates-from-the-interviews) | [面试中被录取的候选人](/solution/2000-2099/2041.Accepted%20Candidates%20From%20the%20Interviews/README.md) | `数据库` | 中等 | 🔒 | | [2042](https://leetcode-cn.com/problems/check-if-numbers-are-ascending-in-a-sentence) | [检查句子中的数字是否递增](/solution/2000-2099/2042.Check%20if%20Numbers%20Are%20Ascending%20in%20a%20Sentence/README.md) | `字符串` | 简单 | | | [2043](https://leetcode-cn.com/problems/simple-bank-system) | [简易银行系统](/solution/2000-2099/2043.Simple%20Bank%20System/README.md) | `设计`,`数组`,`哈希表`,`模拟` | 中等 | | | [2044](https://leetcode-cn.com/problems/count-number-of-maximum-bitwise-or-subsets) | [统计按位或能得到最大值的子集数目](/solution/2000-2099/2044.Count%20Number%20of%20Maximum%20Bitwise-OR%20Subsets/README.md) | `位运算`,`数组`,`回溯` | 中等 | | | [2045](https://leetcode-cn.com/problems/second-minimum-time-to-reach-destination) | [到达目的地的第二短时间](/solution/2000-2099/2045.Second%20Minimum%20Time%20to%20Reach%20Destination/README.md) | `广度优先搜索`,`图`,`最短路` | 困难 | | | [2046](https://leetcode-cn.com/problems/sort-linked-list-already-sorted-using-absolute-values) | [给按照绝对值排序的链表排序](/solution/2000-2099/2046.Sort%20Linked%20List%20Already%20Sorted%20Using%20Absolute%20Values/README.md) | `链表`,`双指针`,`排序` | 中等 | 🔒 | | [2047](https://leetcode-cn.com/problems/number-of-valid-words-in-a-sentence) | [句子中的有效单词数](/solution/2000-2099/2047.Number%20of%20Valid%20Words%20in%20a%20Sentence/README.md) | `字符串` | 简单 | | | [2048](https://leetcode-cn.com/problems/next-greater-numerically-balanced-number) | [下一个更大的数值平衡数](/solution/2000-2099/2048.Next%20Greater%20Numerically%20Balanced%20Number/README.md) | `数学`,`回溯`,`枚举` | 中等 | | | [2049](https://leetcode-cn.com/problems/count-nodes-with-the-highest-score) | [统计最高分的节点数目](/solution/2000-2099/2049.Count%20Nodes%20With%20the%20Highest%20Score/README.md) | `树`,`深度优先搜索`,`数组`,`二叉树` | 中等 | | | [2050](https://leetcode-cn.com/problems/parallel-courses-iii) | [并行课程 III](/solution/2000-2099/2050.Parallel%20Courses%20III/README.md) | `图`,`拓扑排序`,`动态规划` | 困难 | | | [2051](https://leetcode-cn.com/problems/the-category-of-each-member-in-the-store) | [The Category of Each Member in the Store](/solution/2000-2099/2051.The%20Category%20of%20Each%20Member%20in%20the%20Store/README.md) | `数据库` | 中等 | 🔒 | | [2052](https://leetcode-cn.com/problems/minimum-cost-to-separate-sentence-into-rows) | [将句子分隔成行的最低成本](/solution/2000-2099/2052.Minimum%20Cost%20to%20Separate%20Sentence%20Into%20Rows/README.md) | `数组`,`动态规划` | 中等 | 🔒 | | [2053](https://leetcode-cn.com/problems/kth-distinct-string-in-an-array) | [数组中第 K 个独一无二的字符串](/solution/2000-2099/2053.Kth%20Distinct%20String%20in%20an%20Array/README.md) | `数组`,`哈希表`,`字符串`,`计数` | 简单 | | | [2054](https://leetcode-cn.com/problems/two-best-non-overlapping-events) | [两个最好的不重叠活动](/solution/2000-2099/2054.Two%20Best%20Non-Overlapping%20Events/README.md) | `数组`,`二分查找`,`动态规划`,`排序`,`堆（优先队列）` | 中等 | | | [2055](https://leetcode-cn.com/problems/plates-between-candles) | [蜡烛之间的盘子](/solution/2000-2099/2055.Plates%20Between%20Candles/README.md) | `数组`,`字符串`,`二分查找`,`前缀和` | 中等 | | | [2056](https://leetcode-cn.com/problems/number-of-valid-move-combinations-on-chessboard) | [棋盘上有效移动组合的数目](/solution/2000-2099/2056.Number%20of%20Valid%20Move%20Combinations%20On%20Chessboard/README.md) | `数组`,`字符串`,`回溯`,`模拟` | 困难 | | | [2057](https://leetcode-cn.com/problems/smallest-index-with-equal-value) | [值相等的最小索引](/solution/2000-2099/2057.Smallest%20Index%20With%20Equal%20Value/README.md) | `数组` | 简单 | | | [2058](https://leetcode-cn.com/problems/find-the-minimum-and-maximum-number-of-nodes-between-critical-points) | [找出临界点之间的最小和最大距离](/solution/2000-2099/2058.Find%20the%20Minimum%20and%20Maximum%20Number%20of%20Nodes%20Between%20Critical%20Points/README.md) | `链表` | 中等 | | | [2059](https://leetcode-cn.com/problems/minimum-operations-to-convert-number) | [转化数字的最小运算数](/solution/2000-2099/2059.Minimum%20Operations%20to%20Convert%20Number/README.md) | `广度优先搜索`,`数组` | 中等 | | | [2060](https://leetcode-cn.com/problems/check-if-an-original-string-exists-given-two-encoded-strings) | [同源字符串检测](/solution/2000-2099/2060.Check%20if%20an%20Original%20String%20Exists%20Given%20Two%20Encoded%20Strings/README.md) | `字符串`,`动态规划` | 困难 | | | [2061](https://leetcode-cn.com/problems/number-of-spaces-cleaning-robot-cleaned) | [扫地机器人清扫过的空间个数](/solution/2000-2099/2061.Number%20of%20Spaces%20Cleaning%20Robot%20Cleaned/README.md) | `数组`,`矩阵`,`模拟` | 中等 | 🔒 | | [2062](https://leetcode-cn.com/problems/count-vowel-substrings-of-a-string) | [统计字符串中的元音子字符串](/solution/2000-2099/2062.Count%20Vowel%20Substrings%20of%20a%20String/README.md) | `哈希表`,`字符串` | 简单 | | | [2063](https://leetcode-cn.com/problems/vowels-of-all-substrings) | [所有子字符串中的元音](/solution/2000-2099/2063.Vowels%20of%20All%20Substrings/README.md) | `数学`,`字符串`,`动态规划`,`组合数学` | 中等 | | | [2064](https://leetcode-cn.com/problems/minimized-maximum-of-products-distributed-to-any-store) | [分配给商店的最多商品的最小值](/solution/2000-2099/2064.Minimized%20Maximum%20of%20Products%20Distributed%20to%20Any%20Store/README.md) | `数组`,`二分查找` | 中等 | | | [2065](https://leetcode-cn.com/problems/maximum-path-quality-of-a-graph) | [最大化一张图中的路径价值](/solution/2000-2099/2065.Maximum%20Path%20Quality%20of%20a%20Graph/README.md) | `图`,`数组`,`回溯` | 困难 | | | [2066](https://leetcode-cn.com/problems/account-balance) | [账户余额](/solution/2000-2099/2066.Account%20Balance/README.md) | `数据库` | 中等 | 🔒 | | [2067](https://leetcode-cn.com/problems/number-of-equal-count-substrings) | [Number of Equal Count Substrings](/solution/2000-2099/2067.Number%20of%20Equal%20Count%20Substrings/README.md) | `字符串`,`计数`,`前缀和` | 中等 | 🔒 | | [2068](https://leetcode-cn.com/problems/check-whether-two-strings-are-almost-equivalent) | [检查两个字符串是否几乎相等](/solution/2000-2099/2068.Check%20Whether%20Two%20Strings%20are%20Almost%20Equivalent/README.md) | `哈希表`,`字符串`,`计数` | 简单 | | | [2069](https://leetcode-cn.com/problems/walking-robot-simulation-ii) | [模拟行走机器人 II](/solution/2000-2099/2069.Walking%20Robot%20Simulation%20II/README.md) | `设计`,`模拟` | 中等 | | | [2070](https://leetcode-cn.com/problems/most-beautiful-item-for-each-query) | [每一个查询的最大美丽值](/solution/2000-2099/2070.Most%20Beautiful%20Item%20for%20Each%20Query/README.md) | `数组`,`二分查找`,`排序` | 中等 | | | [2071](https://leetcode-cn.com/problems/maximum-number-of-tasks-you-can-assign) | [你可以安排的最多任务数目](/solution/2000-2099/2071.Maximum%20Number%20of%20Tasks%20You%20Can%20Assign/README.md) | `贪心`,`队列`,`数组`,`二分查找`,`排序`,`单调队列` | 困难 | | | [2072](https://leetcode-cn.com/problems/the-winner-university) | [赢得比赛的大学](/solution/2000-2099/2072.The%20Winner%20University/README.md) | `数据库` | 简单 | 🔒 | | [2073](https://leetcode-cn.com/problems/time-needed-to-buy-tickets) | [买票需要的时间](/solution/2000-2099/2073.Time%20Needed%20to%20Buy%20Tickets/README.md) | `队列`,`数组`,`模拟` | 简单 | | | [2074](https://leetcode-cn.com/problems/reverse-nodes-in-even-length-groups) | [反转偶数长度组的节点](/solution/2000-2099/2074.Reverse%20Nodes%20in%20Even%20Length%20Groups/README.md) | `链表` | 中等 | | | [2075](https://leetcode-cn.com/problems/decode-the-slanted-ciphertext) | [解码斜向换位密码](/solution/2000-2099/2075.Decode%20the%20Slanted%20Ciphertext/README.md) | `字符串`,`模拟` | 中等 | | | [2076](https://leetcode-cn.com/problems/process-restricted-friend-requests) | [处理含限制条件的好友请求](/solution/2000-2099/2076.Process%20Restricted%20Friend%20Requests/README.md) | `并查集`,`图` | 困难 | | | [2077](https://leetcode-cn.com/problems/paths-in-maze-that-lead-to-same-room) | [Paths in Maze That Lead to Same Room](/solution/2000-2099/2077.Paths%20in%20Maze%20That%20Lead%20to%20Same%20Room/README.md) | `图` | 中等 | 🔒 | | [2078](https://leetcode-cn.com/problems/two-furthest-houses-with-different-colors) | [两栋颜色不同且距离最远的房子](/solution/2000-2099/2078.Two%20Furthest%20Houses%20With%20Different%20Colors/README.md) | `贪心`,`数组` | 简单 | | | [2079](https://leetcode-cn.com/problems/watering-plants) | [给植物浇水](/solution/2000-2099/2079.Watering%20Plants/README.md) | `数组` | 中等 | | | [2080](https://leetcode-cn.com/problems/range-frequency-queries) | [区间内查询数字的频率](/solution/2000-2099/2080.Range%20Frequency%20Queries/README.md) | `设计`,`线段树`,`数组`,`哈希表`,`二分查找` | 中等 | | | [2081](https://leetcode-cn.com/problems/sum-of-k-mirror-numbers) | [k 镜像数字的和](/solution/2000-2099/2081.Sum%20of%20k-Mirror%20Numbers/README.md) | `数学`,`枚举` | 困难 | | | [2082](https://leetcode-cn.com/problems/the-number-of-rich-customers) | [富有客户的数量](/solution/2000-2099/2082.The%20Number%20of%20Rich%20Customers/README.md) | `数据库` | 简单 | 🔒 | | [2083](https://leetcode-cn.com/problems/substrings-that-begin-and-end-with-the-same-letter) | [求以相同字母开头和结尾的子串总数](/solution/2000-2099/2083.Substrings%20That%20Begin%20and%20End%20With%20the%20Same%20Letter/README.md) | `哈希表`,`数学`,`字符串`,`计数`,`前缀和` | 中等 | 🔒 | | [2084](https://leetcode-cn.com/problems/drop-type-1-orders-for-customers-with-type-0-orders) | [为订单类型为 0 的客户删除类型为 1 的订单](/solution/2000-2099/2084.Drop%20Type%201%20Orders%20for%20Customers%20With%20Type%200%20Orders/README.md) | `数据库` | 中等 | 🔒 | | [2085](https://leetcode-cn.com/problems/count-common-words-with-one-occurrence) | [统计出现过一次的公共字符串](/solution/2000-2099/2085.Count%20Common%20Words%20With%20One%20Occurrence/README.md) | `数组`,`哈希表`,`字符串`,`计数` | 简单 | | | [2086](https://leetcode-cn.com/problems/minimum-number-of-buckets-required-to-collect-rainwater-from-houses) | [从房屋收集雨水需要的最少水桶数](/solution/2000-2099/2086.Minimum%20Number%20of%20Buckets%20Required%20to%20Collect%20Rainwater%20from%20Houses/README.md) | `贪心`,`字符串`,`动态规划` | 中等 | | | [2087](https://leetcode-cn.com/problems/minimum-cost-homecoming-of-a-robot-in-a-grid) | [网格图中机器人回家的最小代价](/solution/2000-2099/2087.Minimum%20Cost%20Homecoming%20of%20a%20Robot%20in%20a%20Grid/README.md) | `贪心`,`数组`,`矩阵` | 中等 | | | [2088](https://leetcode-cn.com/problems/count-fertile-pyramids-in-a-land) | [统计农场中肥沃金字塔的数目](/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/README.md) | `数组`,`动态规划`,`矩阵` | 困难 | | | [2089](https://leetcode-cn.com/problems/find-target-indices-after-sorting-array) | [找出数组排序后的目标下标](/solution/2000-2099/2089.Find%20Target%20Indices%20After%20Sorting%20Array/README.md) | `数组`,`二分查找`,`排序` | 简单 | | | [2090](https://leetcode-cn.com/problems/k-radius-subarray-averages) | [半径为 k 的子数组平均值](/solution/2000-2099/2090.K%20Radius%20Subarray%20Averages/README.md) | `数组`,`滑动窗口` | 中等 | | | [2091](https://leetcode-cn.com/problems/removing-minimum-and-maximum-from-array) | [从数组中移除最大值和最小值](/solution/2000-2099/2091.Removing%20Minimum%20and%20Maximum%20From%20Array/README.md) | `贪心`,`数组` | 中等 | | | [2092](https://leetcode-cn.com/problems/find-all-people-with-secret) | [找出知晓秘密的所有专家](/solution/2000-2099/2092.Find%20All%20People%20With%20Secret/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`图`,`排序` | 困难 | | | [2093](https://leetcode-cn.com/problems/minimum-cost-to-reach-city-with-discounts) | [Minimum Cost to Reach City With Discounts](/solution/2000-2099/2093.Minimum%20Cost%20to%20Reach%20City%20With%20Discounts/README.md) | `图`,`最短路` | 中等 | 🔒 | | [2094](https://leetcode-cn.com/problems/finding-3-digit-even-numbers) | [找出 3 位偶数](/solution/2000-2099/2094.Finding%203-Digit%20Even%20Numbers/README.md) | `数组`,`哈希表`,`枚举`,`排序` | 简单 | | | [2095](https://leetcode-cn.com/problems/delete-the-middle-node-of-a-linked-list) | [删除链表的中间节点](/solution/2000-2099/2095.Delete%20the%20Middle%20Node%20of%20a%20Linked%20List/README.md) | `链表`,`双指针` | 中等 | | | [2096](https://leetcode-cn.com/problems/step-by-step-directions-from-a-binary-tree-node-to-another) | [从二叉树一个节点到另一个节点每一步的方向](/solution/2000-2099/2096.Step-By-Step%20Directions%20From%20a%20Binary%20Tree%20Node%20to%20Another/README.md) | `树`,`深度优先搜索`,`字符串`,`二叉树` | 中等 | | | [2097](https://leetcode-cn.com/problems/valid-arrangement-of-pairs) | [合法重新排列数对](/solution/2000-2099/2097.Valid%20Arrangement%20of%20Pairs/README.md) | `深度优先搜索`,`图`,`欧拉回路` | 困难 | | | [2098](https://leetcode-cn.com/problems/subsequence-of-size-k-with-the-largest-even-sum) | [长度为 K 的最大偶数和子序列](/solution/2000-2099/2098.Subsequence%20of%20Size%20K%20With%20the%20Largest%20Even%20Sum/README.md) | `贪心`,`数组`,`排序` | 中等 | 🔒 | | [2099](https://leetcode-cn.com/problems/find-subsequence-of-length-k-with-the-largest-sum) | [找到和最大的长度为 K 的子序列](/solution/2000-2099/2099.Find%20Subsequence%20of%20Length%20K%20With%20the%20Largest%20Sum/README.md) | `数组`,`哈希表`,`排序`,`堆（优先队列）` | 简单 | | | [2100](https://leetcode-cn.com/problems/find-good-days-to-rob-the-bank) | [适合打劫银行的日子](/solution/2100-2199/2100.Find%20Good%20Days%20to%20Rob%20the%20Bank/README.md) | `数组`,`动态规划`,`前缀和` | 中等 | | | [2101](https://leetcode-cn.com/problems/detonate-the-maximum-bombs) | [引爆最多的炸弹](/solution/2100-2199/2101.Detonate%20the%20Maximum%20Bombs/README.md) | `深度优先搜索`,`广度优先搜索`,`图`,`几何`,`数组`,`数学` | 中等 | | | [2102](https://leetcode-cn.com/problems/sequentially-ordinal-rank-tracker) | [序列顺序查询](/solution/2100-2199/2102.Sequentially%20Ordinal%20Rank%20Tracker/README.md) | `设计`,`数据流`,`有序集合`,`堆（优先队列）` | 困难 | | | [2103](https://leetcode-cn.com/problems/rings-and-rods) | [环和杆](/solution/2100-2199/2103.Rings%20and%20Rods/README.md) | `哈希表`,`字符串` | 简单 | | | [2104](https://leetcode-cn.com/problems/sum-of-subarray-ranges) | [子数组范围和](/solution/2100-2199/2104.Sum%20of%20Subarray%20Ranges/README.md) | `栈`,`数组`,`单调栈` | 中等 | | | [2105](https://leetcode-cn.com/problems/watering-plants-ii) | [给植物浇水 II](/solution/2100-2199/2105.Watering%20Plants%20II/README.md) | `数组`,`双指针`,`模拟` | 中等 | | | [2106](https://leetcode-cn.com/problems/maximum-fruits-harvested-after-at-most-k-steps) | [摘水果](/solution/2100-2199/2106.Maximum%20Fruits%20Harvested%20After%20at%20Most%20K%20Steps/README.md) | `数组`,`二分查找`,`前缀和`,`滑动窗口` | 困难 | | | [2107](https://leetcode-cn.com/problems/number-of-unique-flavors-after-sharing-k-candies) | [分享 K 个糖果后独特口味的数量](/solution/2100-2199/2107.Number%20of%20Unique%20Flavors%20After%20Sharing%20K%20Candies/README.md) | `数组`,`哈希表`,`滑动窗口` | 中等 | 🔒 | | [2108](https://leetcode-cn.com/problems/find-first-palindromic-string-in-the-array) | [找出数组中的第一个回文字符串](/solution/2100-2199/2108.Find%20First%20Palindromic%20String%20in%20the%20Array/README.md) | `数组`,`双指针`,`字符串` | 简单 | | | [2109](https://leetcode-cn.com/problems/adding-spaces-to-a-string) | [向字符串添加空格](/solution/2100-2199/2109.Adding%20Spaces%20to%20a%20String/README.md) | `数组`,`字符串`,`模拟` | 中等 | | | [2110](https://leetcode-cn.com/problems/number-of-smooth-descent-periods-of-a-stock) | [股票平滑下跌阶段的数目](/solution/2100-2199/2110.Number%20of%20Smooth%20Descent%20Periods%20of%20a%20Stock/README.md) | `数组`,`数学`,`动态规划` | 中等 | | | [2111](https://leetcode-cn.com/problems/minimum-operations-to-make-the-array-k-increasing) | [使数组 K 递增的最少操作次数](/solution/2100-2199/2111.Minimum%20Operations%20to%20Make%20the%20Array%20K-Increasing/README.md) | `数组`,`二分查找` | 困难 | | | [2112](https://leetcode-cn.com/problems/the-airport-with-the-most-traffic) | [The Airport With the Most Traffic](/solution/2100-2199/2112.The%20Airport%20With%20the%20Most%20Traffic/README.md) | `数据库` | 中等 | 🔒 | | [2113](https://leetcode-cn.com/problems/elements-in-array-after-removing-and-replacing-elements) | [查询删除和添加元素后的数组](/solution/2100-2199/2113.Elements%20in%20Array%20After%20Removing%20and%20Replacing%20Elements/README.md) | `数组` | 中等 | 🔒 | | [2114](https://leetcode-cn.com/problems/maximum-number-of-words-found-in-sentences) | [句子中的最多单词数](/solution/2100-2199/2114.Maximum%20Number%20of%20Words%20Found%20in%20Sentences/README.md) | `数组`,`字符串` | 简单 | | | [2115](https://leetcode-cn.com/problems/find-all-possible-recipes-from-given-supplies) | [从给定原材料中找到所有可以做出的菜](/solution/2100-2199/2115.Find%20All%20Possible%20Recipes%20from%20Given%20Supplies/README.md) | `图`,`拓扑排序`,`数组`,`哈希表`,`字符串` | 中等 | | | [2116](https://leetcode-cn.com/problems/check-if-a-parentheses-string-can-be-valid) | [判断一个括号字符串是否有效](/solution/2100-2199/2116.Check%20if%20a%20Parentheses%20String%20Can%20Be%20Valid/README.md) | `栈`,`贪心`,`字符串` | 中等 | | | [2117](https://leetcode-cn.com/problems/abbreviating-the-product-of-a-range) | [一个区间内所有数乘积的缩写](/solution/2100-2199/2117.Abbreviating%20the%20Product%20of%20a%20Range/README.md) | `数学` | 困难 | | | [2118](https://leetcode-cn.com/problems/build-the-equation) | [Build the Equation](/solution/2100-2199/2118.Build%20the%20Equation/README.md) | `数据库` | 困难 | 🔒 | | [2119](https://leetcode-cn.com/problems/a-number-after-a-double-reversal) | [反转两次的数字](/solution/2100-2199/2119.A%20Number%20After%20a%20Double%20Reversal/README.md) | `数学` | 简单 | | | [2120](https://leetcode-cn.com/problems/execution-of-all-suffix-instructions-staying-in-a-grid) | [执行所有后缀指令](/solution/2100-2199/2120.Execution%20of%20All%20Suffix%20Instructions%20Staying%20in%20a%20Grid/README.md) | `字符串`,`模拟` | 中等 | | | [2121](https://leetcode-cn.com/problems/intervals-between-identical-elements) | [相同元素的间隔之和](/solution/2100-2199/2121.Intervals%20Between%20Identical%20Elements/README.md) | `数组`,`哈希表`,`前缀和` | 中等 | | | [2122](https://leetcode-cn.com/problems/recover-the-original-array) | [还原原数组](/solution/2100-2199/2122.Recover%20the%20Original%20Array/README.md) | `数组`,`哈希表`,`枚举`,`排序` | 困难 | | | [2123](https://leetcode-cn.com/problems/minimum-operations-to-remove-adjacent-ones-in-matrix) | [使矩阵中的 1 互不相邻的最小操作数](/solution/2100-2199/2123.Minimum%20Operations%20to%20Remove%20Adjacent%20Ones%20in%20Matrix/README.md) | `图`,`数组`,`矩阵` | 困难 | 🔒 | | [2124](https://leetcode-cn.com/problems/check-if-all-as-appears-before-all-bs) | [检查是否所有 A 都在 B 之前](/solution/2100-2199/2124.Check%20if%20All%20A%27s%20Appears%20Before%20All%20B%27s/README.md) | `字符串` | 简单 | | | [2125](https://leetcode-cn.com/problems/number-of-laser-beams-in-a-bank) | [银行中的激光束数量](/solution/2100-2199/2125.Number%20of%20Laser%20Beams%20in%20a%20Bank/README.md) | `数组`,`数学`,`字符串`,`矩阵` | 中等 | | | [2126](https://leetcode-cn.com/problems/destroying-asteroids) | [摧毁小行星](/solution/2100-2199/2126.Destroying%20Asteroids/README.md) | `贪心`,`数组`,`排序` | 中等 | | | [2127](https://leetcode-cn.com/problems/maximum-employees-to-be-invited-to-a-meeting) | [参加会议的最多员工数](/solution/2100-2199/2127.Maximum%20Employees%20to%20Be%20Invited%20to%20a%20Meeting/README.md) | `深度优先搜索`,`图`,`拓扑排序` | 困难 | | | [2128](https://leetcode-cn.com/problems/remove-all-ones-with-row-and-column-flips) | [通过翻转行或列来去除所有的 1](/solution/2100-2199/2128.Remove%20All%20Ones%20With%20Row%20and%20Column%20Flips/README.md) | `位运算`,`数组`,`数学`,`矩阵` | 中等 | 🔒 | | [2129](https://leetcode-cn.com/problems/capitalize-the-title) | [将标题首字母大写](/solution/2100-2199/2129.Capitalize%20the%20Title/README.md) | `字符串` | 简单 | | | [2130](https://leetcode-cn.com/problems/maximum-twin-sum-of-a-linked-list) | [链表最大孪生和](/solution/2100-2199/2130.Maximum%20Twin%20Sum%20of%20a%20Linked%20List/README.md) | `栈`,`链表`,`双指针` | 中等 | | | [2131](https://leetcode-cn.com/problems/longest-palindrome-by-concatenating-two-letter-words) | [连接两字母单词得到的最长回文串](/solution/2100-2199/2131.Longest%20Palindrome%20by%20Concatenating%20Two%20Letter%20Words/README.md) | `贪心`,`数组`,`哈希表`,`字符串`,`计数` | 中等 | | | [2132](https://leetcode-cn.com/problems/stamping-the-grid) | [用邮票贴满网格图](/solution/2100-2199/2132.Stamping%20the%20Grid/README.md) | `贪心`,`数组`,`矩阵`,`前缀和` | 困难 | | | [2133](https://leetcode-cn.com/problems/check-if-every-row-and-column-contains-all-numbers) | [检查是否每一行每一列都包含全部整数](/solution/2100-2199/2133.Check%20if%20Every%20Row%20and%20Column%20Contains%20All%20Numbers/README.md) | `数组`,`哈希表`,`矩阵` | 简单 | | | [2134](https://leetcode-cn.com/problems/minimum-swaps-to-group-all-1s-together-ii) | [最少交换次数来组合所有的 1 II](/solution/2100-2199/2134.Minimum%20Swaps%20to%20Group%20All%201%27s%20Together%20II/README.md) | `数组`,`滑动窗口` | 中等 | | | [2135](https://leetcode-cn.com/problems/count-words-obtained-after-adding-a-letter) | [统计追加字母可以获得的单词数](/solution/2100-2199/2135.Count%20Words%20Obtained%20After%20Adding%20a%20Letter/README.md) | `位运算`,`数组`,`哈希表`,`字符串`,`排序` | 中等 | | | [2136](https://leetcode-cn.com/problems/earliest-possible-day-of-full-bloom) | [全部开花的最早一天](/solution/2100-2199/2136.Earliest%20Possible%20Day%20of%20Full%20Bloom/README.md) | `贪心`,`数组`,`排序` | 困难 | | | [2137](https://leetcode-cn.com/problems/pour-water-between-buckets-to-make-water-levels-equal) | [通过倒水操作让所有的水桶所含水量相等](/solution/2100-2199/2137.Pour%20Water%20Between%20Buckets%20to%20Make%20Water%20Levels%20Equal/README.md) | `数组`,`二分查找` | 中等 | 🔒 | | [2138](https://leetcode-cn.com/problems/divide-a-string-into-groups-of-size-k) | [将字符串拆分为若干长度为 k 的组](/solution/2100-2199/2138.Divide%20a%20String%20Into%20Groups%20of%20Size%20k/README.md) | `字符串`,`模拟` | 简单 | | | [2139](https://leetcode-cn.com/problems/minimum-moves-to-reach-target-score) | [得到目标值的最少行动次数](/solution/2100-2199/2139.Minimum%20Moves%20to%20Reach%20Target%20Score/README.md) | `贪心`,`数学` | 中等 | | | [2140](https://leetcode-cn.com/problems/solving-questions-with-brainpower) | [解决智力问题](/solution/2100-2199/2140.Solving%20Questions%20With%20Brainpower/README.md) | `数组`,`动态规划` | 中等 | | | [2141](https://leetcode-cn.com/problems/maximum-running-time-of-n-computers) | [同时运行 N 台电脑的最长时间](/solution/2100-2199/2141.Maximum%20Running%20Time%20of%20N%20Computers/README.md) | `贪心`,`数组`,`二分查找`,`排序` | 困难 | | | [2142](https://leetcode-cn.com/problems/the-number-of-passengers-in-each-bus-i) | [The Number of Passengers in Each Bus I](/solution/2100-2199/2142.The%20Number%20of%20Passengers%20in%20Each%20Bus%20I/README.md) | `数据库` | 中等 | 🔒 | | [2143](https://leetcode-cn.com/problems/choose-numbers-from-two-arrays-in-range) | [在两个数组的区间中选取数字](/solution/2100-2199/2143.Choose%20Numbers%20From%20Two%20Arrays%20in%20Range/README.md) | `数组`,`动态规划` | 困难 | 🔒 | | [2144](https://leetcode-cn.com/problems/minimum-cost-of-buying-candies-with-discount) | [打折购买糖果的最小开销](/solution/2100-2199/2144.Minimum%20Cost%20of%20Buying%20Candies%20With%20Discount/README.md) | `贪心`,`数组`,`排序` | 简单 | | | [2145](https://leetcode-cn.com/problems/count-the-hidden-sequences) | [统计隐藏数组数目](/solution/2100-2199/2145.Count%20the%20Hidden%20Sequences/README.md) | `数组`,`前缀和` | 中等 | | | [2146](https://leetcode-cn.com/problems/k-highest-ranked-items-within-a-price-range) | [价格范围内最高排名的 K 样物品](/solution/2100-2199/2146.K%20Highest%20Ranked%20Items%20Within%20a%20Price%20Range/README.md) | `广度优先搜索`,`数组`,`矩阵`,`排序`,`堆（优先队列）` | 中等 | | | [2147](https://leetcode-cn.com/problems/number-of-ways-to-divide-a-long-corridor) | [分隔长廊的方案数](/solution/2100-2199/2147.Number%20of%20Ways%20to%20Divide%20a%20Long%20Corridor/README.md) | `数学`,`字符串`,`动态规划` | 困难 | | | [2148](https://leetcode-cn.com/problems/count-elements-with-strictly-smaller-and-greater-elements) | [元素计数](/solution/2100-2199/2148.Count%20Elements%20With%20Strictly%20Smaller%20and%20Greater%20Elements/README.md) | `数组`,`排序` | 简单 | | | [2149](https://leetcode-cn.com/problems/rearrange-array-elements-by-sign) | [按符号重排数组](/solution/2100-2199/2149.Rearrange%20Array%20Elements%20by%20Sign/README.md) | `数组`,`双指针`,`模拟` | 中等 | | | [2150](https://leetcode-cn.com/problems/find-all-lonely-numbers-in-the-array) | [找出数组中的所有孤独数字](/solution/2100-2199/2150.Find%20All%20Lonely%20Numbers%20in%20the%20Array/README.md) | `数组`,`哈希表`,`计数` | 中等 | | | [2151](https://leetcode-cn.com/problems/maximum-good-people-based-on-statements) | [基于陈述统计最多好人数](/solution/2100-2199/2151.Maximum%20Good%20People%20Based%20on%20Statements/README.md) | `位运算`,`数组`,`回溯`,`枚举` | 困难 | | | [2152](https://leetcode-cn.com/problems/minimum-number-of-lines-to-cover-points) | [穿过所有点的所需最少直线数量](/solution/2100-2199/2152.Minimum%20Number%20of%20Lines%20to%20Cover%20Points/README.md) | `位运算`,`几何`,`数组`,`哈希表`,`数学`,`动态规划`,`回溯`,`状态压缩` | 中等 | 🔒 | | [2153](https://leetcode-cn.com/problems/the-number-of-passengers-in-each-bus-ii) | [The Number of Passengers in Each Bus II](/solution/2100-2199/2153.The%20Number%20of%20Passengers%20in%20Each%20Bus%20II/README.md) | `数据库` | 困难 | 🔒 | | [2154](https://leetcode-cn.com/problems/keep-multiplying-found-values-by-two) | [将找到的值乘以 2](/solution/2100-2199/2154.Keep%20Multiplying%20Found%20Values%20by%20Two/README.md) | `数组`,`哈希表`,`排序`,`模拟` | 简单 | | | [2155](https://leetcode-cn.com/problems/all-divisions-with-the-highest-score-of-a-binary-array) | [分组得分最高的所有下标](/solution/2100-2199/2155.All%20Divisions%20With%20the%20Highest%20Score%20of%20a%20Binary%20Array/README.md) | `数组` | 中等 | | | [2156](https://leetcode-cn.com/problems/find-substring-with-given-hash-value) | [查找给定哈希值的子串](/solution/2100-2199/2156.Find%20Substring%20With%20Given%20Hash%20Value/README.md) | `字符串`,`滑动窗口`,`哈希函数`,`滚动哈希` | 中等 | | | [2157](https://leetcode-cn.com/problems/groups-of-strings) | [字符串分组](/solution/2100-2199/2157.Groups%20of%20Strings/README.md) | `位运算`,`并查集`,`字符串` | 困难 | | | [2158](https://leetcode-cn.com/problems/amount-of-new-area-painted-each-day) | [Amount of New Area Painted Each Day](/solution/2100-2199/2158.Amount%20of%20New%20Area%20Painted%20Each%20Day/README.md) | `线段树`,`数组`,`有序集合` | 困难 | 🔒 | | [2159](https://leetcode-cn.com/problems/order-two-columns-independently) | [Order Two Columns Independently](/solution/2100-2199/2159.Order%20Two%20Columns%20Independently/README.md) | `数据库` | 中等 | 🔒 | | [2160](https://leetcode-cn.com/problems/minimum-sum-of-four-digit-number-after-splitting-digits) | [拆分数位后四位数字的最小和](/solution/2100-2199/2160.Minimum%20Sum%20of%20Four%20Digit%20Number%20After%20Splitting%20Digits/README.md) | `贪心`,`数学`,`排序` | 简单 | | | [2161](https://leetcode-cn.com/problems/partition-array-according-to-given-pivot) | [根据给定数字划分数组](/solution/2100-2199/2161.Partition%20Array%20According%20to%20Given%20Pivot/README.md) | `数组`,`双指针`,`模拟` | 中等 | | | [2162](https://leetcode-cn.com/problems/minimum-cost-to-set-cooking-time) | [设置时间的最少代价](/solution/2100-2199/2162.Minimum%20Cost%20to%20Set%20Cooking%20Time/README.md) | `数学`,`枚举` | 中等 | | | [2163](https://leetcode-cn.com/problems/minimum-difference-in-sums-after-removal-of-elements) | [删除元素后和的最小差值](/solution/2100-2199/2163.Minimum%20Difference%20in%20Sums%20After%20Removal%20of%20Elements/README.md) | `数组`,`动态规划`,`堆（优先队列）` | 困难 | | | [2164](https://leetcode-cn.com/problems/sort-even-and-odd-indices-independently) | [对奇偶下标分别排序](/solution/2100-2199/2164.Sort%20Even%20and%20Odd%20Indices%20Independently/README.md) | `数组`,`排序` | 简单 | | | [2165](https://leetcode-cn.com/problems/smallest-value-of-the-rearranged-number) | [重排数字的最小值](/solution/2100-2199/2165.Smallest%20Value%20of%20the%20Rearranged%20Number/README.md) | `数学`,`排序` | 中等 | | | [2166](https://leetcode-cn.com/problems/design-bitset) | [设计位集](/solution/2100-2199/2166.Design%20Bitset/README.md) | `设计`,`数组`,`哈希表` | 中等 | | | [2167](https://leetcode-cn.com/problems/minimum-time-to-remove-all-cars-containing-illegal-goods) | [移除所有载有违禁货物车厢所需的最少时间](/solution/2100-2199/2167.Minimum%20Time%20to%20Remove%20All%20Cars%20Containing%20Illegal%20Goods/README.md) | `字符串`,`动态规划` | 困难 | | | [2168](https://leetcode-cn.com/problems/unique-substrings-with-equal-digit-frequency) | [每个数字的频率都相同的独特子字符串的数量](/solution/2100-2199/2168.Unique%20Substrings%20With%20Equal%20Digit%20Frequency/README.md) | `哈希表`,`字符串`,`计数`,`哈希函数`,`滚动哈希` | 中等 | 🔒 | | [2169](https://leetcode-cn.com/problems/count-operations-to-obtain-zero) | [得到 0 的操作数](/solution/2100-2199/2169.Count%20Operations%20to%20Obtain%20Zero/README.md) | `数学`,`模拟` | 简单 | | | [2170](https://leetcode-cn.com/problems/minimum-operations-to-make-the-array-alternating) | [使数组变成交替数组的最少操作数](/solution/2100-2199/2170.Minimum%20Operations%20to%20Make%20the%20Array%20Alternating/README.md) | `贪心`,`数组`,`哈希表`,`计数` | 中等 | | | [2171](https://leetcode-cn.com/problems/removing-minimum-number-of-magic-beans) | [拿出最少数目的魔法豆](/solution/2100-2199/2171.Removing%20Minimum%20Number%20of%20Magic%20Beans/README.md) | `数组`,`前缀和`,`排序` | 中等 | | | [2172](https://leetcode-cn.com/problems/maximum-and-sum-of-array) | [数组的最大与和](/solution/2100-2199/2172.Maximum%20AND%20Sum%20of%20Array/README.md) | `位运算`,`数组`,`动态规划`,`状态压缩` | 困难 | | | [2173](https://leetcode-cn.com/problems/longest-winning-streak) | [最多连胜的次数](/solution/2100-2199/2173.Longest%20Winning%20Streak/README.md) | `数据库` | 困难 | 🔒 | | [2174](https://leetcode-cn.com/problems/remove-all-ones-with-row-and-column-flips-ii) | [Remove All Ones With Row and Column Flips II](/solution/2100-2199/2174.Remove%20All%20Ones%20With%20Row%20and%20Column%20Flips%20II/README.md) | `位运算`,`广度优先搜索`,`数组`,`矩阵` | 中等 | 🔒 | | [2175](https://leetcode-cn.com/problems/the-change-in-global-rankings) | [The Change in Global Rankings](/solution/2100-2199/2175.The%20Change%20in%20Global%20Rankings/README.md) | `数据库` | 中等 | 🔒 | | [2176](https://leetcode-cn.com/problems/count-equal-and-divisible-pairs-in-an-array) | [统计数组中相等且可以被整除的数对](/solution/2100-2199/2176.Count%20Equal%20and%20Divisible%20Pairs%20in%20an%20Array/README.md) | `数组` | 简单 | | | [2177](https://leetcode-cn.com/problems/find-three-consecutive-integers-that-sum-to-a-given-number) | [找到和为给定整数的三个连续整数](/solution/2100-2199/2177.Find%20Three%20Consecutive%20Integers%20That%20Sum%20to%20a%20Given%20Number/README.md) | `数学`,`模拟` | 中等 | | | [2178](https://leetcode-cn.com/problems/maximum-split-of-positive-even-integers) | [拆分成最多数目的正偶数之和](/solution/2100-2199/2178.Maximum%20Split%20of%20Positive%20Even%20Integers/README.md) | `贪心`,`数学` | 中等 | | | [2179](https://leetcode-cn.com/problems/count-good-triplets-in-an-array) | [统计数组中好三元组数目](/solution/2100-2199/2179.Count%20Good%20Triplets%20in%20an%20Array/README.md) | `树状数组`,`线段树`,`数组`,`二分查找`,`分治`,`有序集合`,`归并排序` | 困难 | | | [2180](https://leetcode-cn.com/problems/count-integers-with-even-digit-sum) | [统计各位数字之和为偶数的整数个数](/solution/2100-2199/2180.Count%20Integers%20With%20Even%20Digit%20Sum/README.md) | `数学`,`模拟` | 简单 | | | [2181](https://leetcode-cn.com/problems/merge-nodes-in-between-zeros) | [合并零之间的节点](/solution/2100-2199/2181.Merge%20Nodes%20in%20Between%20Zeros/README.md) | `链表`,`模拟` | 中等 | | | [2182](https://leetcode-cn.com/problems/construct-string-with-repeat-limit) | [构造限制重复的字符串](/solution/2100-2199/2182.Construct%20String%20With%20Repeat%20Limit/README.md) | `贪心`,`字符串`,`计数`,`堆（优先队列）` | 中等 | | | [2183](https://leetcode-cn.com/problems/count-array-pairs-divisible-by-k) | [统计可以被 K 整除的下标对数目](/solution/2100-2199/2183.Count%20Array%20Pairs%20Divisible%20by%20K/README.md) | `数组`,`数学`,`数论` | 困难 | | | [2184](https://leetcode-cn.com/problems/number-of-ways-to-build-sturdy-brick-wall) | [Number of Ways to Build Sturdy Brick Wall](/solution/2100-2199/2184.Number%20of%20Ways%20to%20Build%20Sturdy%20Brick%20Wall/README.md) | `位运算`,`数组`,`动态规划`,`状态压缩` | 中等 | 🔒 | | [2185](https://leetcode-cn.com/problems/counting-words-with-a-given-prefix) | [统计包含给定前缀的字符串](/solution/2100-2199/2185.Counting%20Words%20With%20a%20Given%20Prefix/README.md) | `数组`,`字符串` | 简单 | | | [2186](https://leetcode-cn.com/problems/minimum-number-of-steps-to-make-two-strings-anagram-ii) | [使两字符串互为字母异位词的最少步骤数](/solution/2100-2199/2186.Minimum%20Number%20of%20Steps%20to%20Make%20Two%20Strings%20Anagram%20II/README.md) | `哈希表`,`字符串`,`计数` | 中等 | | | [2187](https://leetcode-cn.com/problems/minimum-time-to-complete-trips) | [完成旅途的最少时间](/solution/2100-2199/2187.Minimum%20Time%20to%20Complete%20Trips/README.md) | `数组`,`二分查找` | 中等 | | | [2188](https://leetcode-cn.com/problems/minimum-time-to-finish-the-race) | [完成比赛的最少时间](/solution/2100-2199/2188.Minimum%20Time%20to%20Finish%20the%20Race/README.md) | `数组`,`动态规划` | 困难 | | | [2189](https://leetcode-cn.com/problems/number-of-ways-to-build-house-of-cards) | [Number of Ways to Build House of Cards](/solution/2100-2199/2189.Number%20of%20Ways%20to%20Build%20House%20of%20Cards/README.md) | `数学`,`动态规划` | 中等 | 🔒 | | [2190](https://leetcode-cn.com/problems/most-frequent-number-following-key-in-an-array) | [数组中紧跟 key 之后出现最频繁的数字](/solution/2100-2199/2190.Most%20Frequent%20Number%20Following%20Key%20In%20an%20Array/README.md) | `数组`,`哈希表`,`计数` | 简单 | | | [2191](https://leetcode-cn.com/problems/sort-the-jumbled-numbers) | [将杂乱无章的数字排序](/solution/2100-2199/2191.Sort%20the%20Jumbled%20Numbers/README.md) | `数组`,`排序` | 中等 | | | [2192](https://leetcode-cn.com/problems/all-ancestors-of-a-node-in-a-directed-acyclic-graph) | [有向无环图中一个节点的所有祖先](/solution/2100-2199/2192.All%20Ancestors%20of%20a%20Node%20in%20a%20Directed%20Acyclic%20Graph/README.md) | `深度优先搜索`,`广度优先搜索`,`图`,`拓扑排序` | 中等 | | | [2193](https://leetcode-cn.com/problems/minimum-number-of-moves-to-make-palindrome) | [得到回文串的最少操作次数](/solution/2100-2199/2193.Minimum%20Number%20of%20Moves%20to%20Make%20Palindrome/README.md) | `贪心`,`树状数组`,`双指针`,`字符串` | 困难 | | | [2194](https://leetcode-cn.com/problems/cells-in-a-range-on-an-excel-sheet) | [Excel 表中某个范围内的单元格](/solution/2100-2199/2194.Cells%20in%20a%20Range%20on%20an%20Excel%20Sheet/README.md) | `字符串` | 简单 | | | [2195](https://leetcode-cn.com/problems/append-k-integers-with-minimal-sum) | [向数组中追加 K 个整数](/solution/2100-2199/2195.Append%20K%20Integers%20With%20Minimal%20Sum/README.md) | `贪心`,`数组`,`数学`,`排序` | 中等 | | | [2196](https://leetcode-cn.com/problems/create-binary-tree-from-descriptions) | [根据描述创建二叉树](/solution/2100-2199/2196.Create%20Binary%20Tree%20From%20Descriptions/README.md) | `树`,`深度优先搜索`,`广度优先搜索`,`数组`,`哈希表`,`二叉树` | 中等 | | | [2197](https://leetcode-cn.com/problems/replace-non-coprime-numbers-in-array) | [替换数组中的非互质数](/solution/2100-2199/2197.Replace%20Non-Coprime%20Numbers%20in%20Array/README.md) | `栈`,`数组`,`数学`,`数论` | 困难 | | | [2198](https://leetcode-cn.com/problems/number-of-single-divisor-triplets) | [Number of Single Divisor Triplets](/solution/2100-2199/2198.Number%20of%20Single%20Divisor%20Triplets/README.md) | `数学` | 中等 | 🔒 | | [2199](https://leetcode-cn.com/problems/finding-the-topic-of-each-post) | [Finding the Topic of Each Post](/solution/2100-2199/2199.Finding%20the%20Topic%20of%20Each%20Post/README.md) | `数据库` | 困难 | 🔒 | | [2200](https://leetcode-cn.com/problems/find-all-k-distant-indices-in-an-array) | [找出数组中的所有 K 近邻下标](/solution/2200-2299/2200.Find%20All%20K-Distant%20Indices%20in%20an%20Array/README.md) | `数组` | 简单 | | | [2201](https://leetcode-cn.com/problems/count-artifacts-that-can-be-extracted) | [统计可以提取的工件](/solution/2200-2299/2201.Count%20Artifacts%20That%20Can%20Be%20Extracted/README.md) | `数组`,`哈希表`,`模拟` | 中等 | | | [2202](https://leetcode-cn.com/problems/maximize-the-topmost-element-after-k-moves) | [K 次操作后最大化顶端元素](/solution/2200-2299/2202.Maximize%20the%20Topmost%20Element%20After%20K%20Moves/README.md) | `贪心`,`数组` | 中等 | | | [2203](https://leetcode-cn.com/problems/minimum-weighted-subgraph-with-the-required-paths) | [得到要求路径的最小带权子图](/solution/2200-2299/2203.Minimum%20Weighted%20Subgraph%20With%20the%20Required%20Paths/README.md) | `图`,`最短路` | 困难 | | | [2204](https://leetcode-cn.com/problems/distance-to-a-cycle-in-undirected-graph) | [Distance to a Cycle in Undirected Graph](/solution/2200-2299/2204.Distance%20to%20a%20Cycle%20in%20Undirected%20Graph/README.md) | `深度优先搜索`,`广度优先搜索`,`并查集`,`图` | 困难 | 🔒 | | [2205](https://leetcode-cn.com/problems/the-number-of-users-that-are-eligible-for-discount) | [The Number of Users That Are Eligible for Discount](/solution/2200-2299/2205.The%20Number%20of%20Users%20That%20Are%20Eligible%20for%20Discount/README.md) | `数据库` | 简单 | 🔒 | | [2206](https://leetcode-cn.com/problems/divide-array-into-equal-pairs) | [将数组划分成相等数对](/solution/2200-2299/2206.Divide%20Array%20Into%20Equal%20Pairs/README.md) | `位运算`,`数组`,`哈希表`,`计数` | 简单 | | | [2207](https://leetcode-cn.com/problems/maximize-number-of-subsequences-in-a-string) | [字符串中最多数目的子字符串](/solution/2200-2299/2207.Maximize%20Number%20of%20Subsequences%20in%20a%20String/README.md) | `贪心`,`字符串`,`前缀和` | 中等 | | | [2208](https://leetcode-cn.com/problems/minimum-operations-to-halve-array-sum) | [将数组和减半的最少操作次数](/solution/2200-2299/2208.Minimum%20Operations%20to%20Halve%20Array%20Sum/README.md) | `贪心`,`数组`,`堆（优先队列）` | 中等 | | | [2209](https://leetcode-cn.com/problems/minimum-white-tiles-after-covering-with-carpets) | [用地毯覆盖后的最少白色砖块](/solution/2200-2299/2209.Minimum%20White%20Tiles%20After%20Covering%20With%20Carpets/README.md) | `字符串`,`动态规划`,`前缀和` | 困难 | | | [2210](https://leetcode-cn.com/problems/count-hills-and-valleys-in-an-array) | [统计数组中峰和谷的数量](/solution/2200-2299/2210.Count%20Hills%20and%20Valleys%20in%20an%20Array/README.md) | `数组` | 简单 | | | [2211](https://leetcode-cn.com/problems/count-collisions-on-a-road) | [统计道路上的碰撞次数](/solution/2200-2299/2211.Count%20Collisions%20on%20a%20Road/README.md) | `栈`,`字符串` | 中等 | | | [2212](https://leetcode-cn.com/problems/maximum-points-in-an-archery-competition) | [射箭比赛中的最大得分](/solution/2200-2299/2212.Maximum%20Points%20in%20an%20Archery%20Competition/README.md) | `位运算`,`递归`,`数组`,`枚举` | 中等 | | | [2213](https://leetcode-cn.com/problems/longest-substring-of-one-repeating-character) | [由单个字符重复的最长子字符串](/solution/2200-2299/2213.Longest%20Substring%20of%20One%20Repeating%20Character/README.md) | `线段树`,`数组`,`字符串`,`有序集合` | 困难 | | | [2214](https://leetcode-cn.com/problems/minimum-health-to-beat-game) | [Minimum Health to Beat Game](/solution/2200-2299/2214.Minimum%20Health%20to%20Beat%20Game/README.md) | `贪心`,`数组`,`前缀和` | 中等 | 🔒 | | [2215](https://leetcode-cn.com/problems/find-the-difference-of-two-arrays) | [找出两数组的不同](/solution/2200-2299/2215.Find%20the%20Difference%20of%20Two%20Arrays/README.md) | `数组`,`哈希表` | 简单 | | | [2216](https://leetcode-cn.com/problems/minimum-deletions-to-make-array-beautiful) | [美化数组的最少删除数](/solution/2200-2299/2216.Minimum%20Deletions%20to%20Make%20Array%20Beautiful/README.md) | `栈`,`贪心`,`数组` | 中等 | | | [2217](https://leetcode-cn.com/problems/find-palindrome-with-fixed-length) | [找到指定长度的回文数](/solution/2200-2299/2217.Find%20Palindrome%20With%20Fixed%20Length/README.md) | `数组`,`数学` | 中等 | | | [2218](https://leetcode-cn.com/problems/maximum-value-of-k-coins-from-piles) | [从栈中取出 K 个硬币的最大面值和](/solution/2200-2299/2218.Maximum%20Value%20of%20K%20Coins%20From%20Piles/README.md) | `数组`,`动态规划`,`前缀和` | 困难 | | | [2219](https://leetcode-cn.com/problems/maximum-sum-score-of-array) | [Maximum Sum Score of Array](/solution/2200-2299/2219.Maximum%20Sum%20Score%20of%20Array/README.md) | | 中等 | 🔒 | | [2220](https://leetcode-cn.com/problems/minimum-bit-flips-to-convert-number) | [转换数字的最少位翻转次数](/solution/2200-2299/2220.Minimum%20Bit%20Flips%20to%20Convert%20Number/README.md) | | 简单 | | | [2221](https://leetcode-cn.com/problems/find-triangular-sum-of-an-array) | [数组的三角和](/solution/2200-2299/2221.Find%20Triangular%20Sum%20of%20an%20Array/README.md) | | 中等 | | | [2222](https://leetcode-cn.com/problems/number-of-ways-to-select-buildings) | [选择建筑的方案数](/solution/2200-2299/2222.Number%20of%20Ways%20to%20Select%20Buildings/README.md) | | 中等 | | | [2223](https://leetcode-cn.com/problems/sum-of-scores-of-built-strings) | [构造字符串的总得分和](/solution/2200-2299/2223.Sum%20of%20Scores%20of%20Built%20Strings/README.md) | | 困难 | | | [2224](https://leetcode-cn.com/problems/minimum-number-of-operations-to-convert-time) | [转化时间需要的最少操作数](/solution/2200-2299/2224.Minimum%20Number%20of%20Operations%20to%20Convert%20Time/README.md) | | 简单 | | | [2225](https://leetcode-cn.com/problems/find-players-with-zero-or-one-losses) | [找出输掉零场或一场比赛的玩家](/solution/2200-2299/2225.Find%20Players%20With%20Zero%20or%20One%20Losses/README.md) | `图` | 中等 | | | [2226](https://leetcode-cn.com/problems/maximum-candies-allocated-to-k-children) | [每个小孩最多能分到多少糖果](/solution/2200-2299/2226.Maximum%20Candies%20Allocated%20to%20K%20Children/README.md) | `数组`,`二分查找` | 中等 | | | [2227](https://leetcode-cn.com/problems/encrypt-and-decrypt-strings) | [加密解密字符串](/solution/2200-2299/2227.Encrypt%20and%20Decrypt%20Strings/README.md) | `哈希表`,`字符串` | 困难 | | ## 版权 著作权归 [GitHub 开源社区 Doocs](https://github.com/doocs) 所有，商业转载请联系 [@yanglbme](mailto:contact@yanglibin.info) 获得授权，非商业转载请注明出处。