-
0000-0099
- 0001.Two Sum
- 0002.Add Two Numbers
- 0003.Longest Substring Without Repeating Characters
- 0004.Median of Two Sorted Arrays
- 0005.Longest Palindromic Substring
- 0006.ZigZag Conversion
- 0007.Reverse Integer
- 0008.String to Integer (atoi)
- 0009.Palindrome Number
- 0010.Regular Expression Matching
- 0011.Container With Most Water
- 0012.Integer to Roman
- 0013.Roman to Integer
- 0014.Longest Common Prefix
- 0015.3Sum
- 0016.3Sum Closest
- 0017.Letter Combinations of a Phone Number
- 0018.4Sum
- 0019.Remove Nth Node From End of List
- 0020.Valid Parentheses
- 0021.Merge Two Sorted Lists
- 0022.Generate Parentheses
- 0023.Merge k Sorted Lists
- 0024.Swap Nodes in Pairs
- 0025.Reverse Nodes in k-Group
- 0026.Remove Duplicates from Sorted Array
- 0027.Remove Element
- 0028.Implement strStr()
- 0029.Divide Two Integers
- 0030.Substring with Concatenation of All Words
- 0031.Next Permutation
- 0032.Longest Valid Parentheses
- 0033.Search in Rotated Sorted Array
- 0034.Find First and Last Position of Element in Sorted Array
- 0035.Search Insert Position
- 0036.Valid Sudoku
- 0037.Sudoku Solver
- 0038.Count and Say
- 0039.Combination Sum
- 0040.Combination Sum II
- 0041.First Missing Positive
- 0042.Trapping Rain Water
- 0043.Multiply Strings
- 0044.Wildcard Matching
- 0045.Jump Game II
- 0046.Permutations
- 0047.Permutations II
- 0048.Rotate Image
- 0049.Group Anagrams
- 0050.Pow(x, n)
- 0051.N-Queens
- 0052.N-Queens II
- 0053.Maximum Subarray
- 0054.Spiral Matrix
- 0055.Jump Game
- 0056.Merge Intervals
- 0057.Insert Interval
- 0058.Length of Last Word
- 0059.Spiral Matrix II
- 0060.Permutation Sequence
- 0061.Rotate List
- 0062.Unique Paths
- 0063.Unique Paths II
- 0064.Minimum Path Sum
- 0065.Valid Number
- 0066.Plus One
- 0067.Add Binary
- 0068.Text Justification
- 0069.Sqrt(x)
- 0070.Climbing Stairs
- 0071.Simplify Path
- 0072.Edit Distance
- 0073.Set Matrix Zeroes
- 0074.Search a 2D Matrix
- 0075.Sort Colors
- 0076.Minimum Window Substring
- 0077.Combinations
- 0078.Subsets
- 0079.Word Search
- 0080.Remove Duplicates from Sorted Array II
- 0081.Search in Rotated Sorted Array II
- 0082.Remove Duplicates from Sorted List II
- 0083.Remove Duplicates from Sorted List
- 0084.Largest Rectangle in Histogram
- 0085.Maximal Rectangle
- 0086.Partition List
- 0087.Scramble String
- 0088.Merge Sorted Array
- 0089.Gray Code
- 0090.Subsets II
- 0091.Decode Ways
- 0092.Reverse Linked List II
- 0093.Restore IP Addresses
- 0094.Binary Tree Inorder Traversal
- 0095.Unique Binary Search Trees II
- 0096.Unique Binary Search Trees
- 0097.Interleaving String
- 0098.Validate Binary Search Tree
- 0099.Recover Binary Search Tree
-
0100-0199
- 0100.Same Tree
- 0101.Symmetric Tree
- 0102.Binary Tree Level Order Traversal
- 0103.Binary Tree Zigzag Level Order Traversal
- 0104.Maximum Depth of Binary Tree
- 0105.Construct Binary Tree from Preorder and Inorder Traversal
- 0106.Construct Binary Tree from Inorder and Postorder Traversal
- 0107.Binary Tree Level Order Traversal II
- 0108.Convert Sorted Array to Binary Search Tree
- 0109.Convert Sorted List to Binary Search Tree
- 0110.Balanced Binary Tree
- 0111.Minimum Depth of Binary Tree
- 0112.Path Sum
- 0113.Path Sum II
- 0114.Flatten Binary Tree to Linked List
- 0115.Distinct Subsequences
- 0116.Populating Next Right Pointers in Each Node
- 0117.Populating Next Right Pointers in Each Node II
- 0118.Pascal's Triangle
- 0119.Pascal's Triangle II
- 0120.Triangle
- 0121.Best Time to Buy and Sell Stock
- 0122.Best Time to Buy and Sell Stock II
- 0123.Best Time to Buy and Sell Stock III
- 0124.Binary Tree Maximum Path Sum
- 0125.Valid Palindrome
- 0126.Word Ladder II
- 0127.Word Ladder
- 0128.Longest Consecutive Sequence
- 0129.Sum Root to Leaf Numbers
- 0130.Surrounded Regions
- 0131.Palindrome Partitioning
- 0132.Palindrome Partitioning II
- 0133.Clone Graph
- 0134.Gas Station
- 0135.Candy
- 0136.Single Number
- 0137.Single Number II
- 0138.Copy List with Random Pointer
- 0139.Word Break
- 0140.Word Break II
- 0141.Linked List Cycle
- 0142.Linked List Cycle II
- 0143.Reorder List
- 0144.Binary Tree Preorder Traversal
- 0145.Binary Tree Postorder Traversal
- 0146.Lru Cache
- 0147.Insertion Sort List
- 0148.Sort List
- 0149.Max Points on a Line
- 0150.Evaluate Reverse Polish Notation
- 0151.Reverse Words in a String
- 0152.Maximum Product Subarray
- 0153.Find Minimum in Rotated Sorted Array
- 0154.Find Minimum in Rotated Sorted Array II
- 0155.Min Stack
- 0156.Binary Tree Upside Down
- 0157.Read N Characters Given Read4
- 0158.Read N Characters Given Read4 II - Call multiple times
- 0159.Longest Substring with At Most Two Distinct Characters
- 0160.Intersection of Two Linked Lists
- 0161.One Edit Distance
- 0162.Find Peak Element
- 0163.Missing Ranges
- 0164.Maximum Gap
- 0165.Compare Version Numbers
- 0166.Fraction to Recurring Decimal
- 0167.Two Sum II - Input array is sorted
- 0168.Excel Sheet Column Title
- 0169.Majority Element
- 0170.Two Sum III - Data structure design
- 0171.Excel Sheet Column Number
- 0172.Factorial Trailing Zeroes
- 0173.Binary Search Tree Iterator
- 0174.Dungeon Game
- 0175.Combine Two Tables
- 0176.Second Highest Salary
- 0177.Nth Highest Salary
- 0178.Rank Scores
- 0179.Largest Number
- 0180.Consecutive Numbers
- 0181.Employees Earning More Than Their Managers
- 0182.Duplicate Emails
- 0183.Customers Who Never Order
- 0184.Department Highest Salary
- 0185.Department Top Three Salaries
- 0186.Reverse Words in a String II
- 0187.Repeated DNA Sequences
- 0188.Best Time to Buy and Sell Stock IV
- 0189.Rotate Array
- 0190.Reverse Bits
- 0191.Number of 1 Bits
- 0192.Word Frequency
- 0193.Valid Phone Numbers
- 0194.Transpose File
- 0195.Tenth Line
- 0196.Delete Duplicate Emails
- 0197.Rising Temperature
- 0198.House Robber
- 0199.Binary Tree Right Side View
-
0200-0299
- 0200.Number of Islands
- 0201.Bitwise AND of Numbers Range
- 0202.Happy Number
- 0203.Remove Linked List Elements
- 0204.Count Primes
- 0205.Isomorphic Strings
- 0206.Reverse Linked List
- 0207.Course Schedule
- 0208.Implement Trie (Prefix Tree)
- 0209.Minimum Size Subarray Sum
- 0210.Course Schedule II
- 0211.Design Add and Search Words Data Structure
- 0212.Word Search II
- 0213.House Robber II
- 0214.Shortest Palindrome
- 0215.Kth Largest Element in an Array
- 0216.Combination Sum III
- 0217.Contains Duplicate
- 0218.The Skyline Problem
- 0219.Contains Duplicate II
- 0220.Contains Duplicate III
- 0221.Maximal Square
- 0222.Count Complete Tree Nodes
- 0223.Rectangle Area
- 0224.Basic Calculator
- 0225.Implement Stack using Queues
- 0226.Invert Binary Tree
- 0227.Basic Calculator II
- 0228.Summary Ranges
- 0229.Majority Element II
- 0230.Kth Smallest Element in a BST
- 0231.Power of Two
- 0232.Implement Queue using Stacks
- 0233.Number of Digit One
- 0234.Palindrome Linked List
- 0235.Lowest Common Ancestor of a Binary Search Tree
- 0236.Lowest Common Ancestor of a Binary Tree
- 0237.Delete Node in a Linked List
- 0238.Product of Array Except Self
- 0239.Sliding Window Maximum
- 0240.Search a 2D Matrix II
- 0241.Different Ways to Add Parentheses
- 0242.Valid Anagram
- 0243.Shortest Word Distance
- 0244.Shortest Word Distance II
- 0245.Shortest Word Distance III
- 0246.Strobogrammatic Number
- 0247.Strobogrammatic Number II
- 0248.Strobogrammatic Number III
- 0249.Group Shifted Strings
- 0250.Count Univalue Subtrees
- 0251.Flatten 2D Vector
- 0252.Meeting Rooms
- 0253.Meeting Rooms II
- 0254.Factor Combinations
- 0255.Verify Preorder Sequence in Binary Search Tree
- 0256.Paint House
- 0257.Binary Tree Paths
- 0258.Add Digits
- 0259.3Sum Smaller
- 0260.Single Number III
- 0261.Graph Valid Tree
- 0262.Trips and Users
- 0263.Ugly Number
- 0264.Ugly Number II
- 0265.Paint House II
- 0266.Palindrome Permutation
- 0267.Palindrome Permutation II
- 0268.Missing Number
- 0269.Alien Dictionary
- 0270.Closest Binary Search Tree Value
- 0271.Encode and Decode Strings
- 0272.Closest Binary Search Tree Value II
- 0273.Integer to English Words
- 0274.H-Index
- 0275.H-Index II
- 0276.Paint Fence
- 0277.Find the Celebrity
- 0278.First Bad Version
- 0279.Perfect Squares
- 0280.Wiggle Sort
- 0281.Zigzag Iterator
- 0282.Expression Add Operators
- 0283.Move Zeroes
- 0284.Peeking Iterator
- 0285.Inorder Successor in BST
- 0286.Walls and Gates
- 0287.Find the Duplicate Number
- 0288.Unique Word Abbreviation
- 0289.Game of Life
- 0290.Word Pattern
- 0291.Word Pattern II
- 0292.Nim Game
- 0293.Flip Game
- 0294.Flip Game II
- 0295.Find Median from Data Stream
- 0296.Best Meeting Point
- 0297.Serialize and Deserialize Binary Tree
- 0298.Binary Tree Longest Consecutive Sequence
- 0299.Bulls and Cows
-
0300-0399
- 0300.Longest Increasing Subsequence
- 0301.Remove Invalid Parentheses
- 0302.Smallest Rectangle Enclosing Black Pixels
- 0303.Range Sum Query - Immutable
- 0304.Range Sum Query 2D - Immutable
- 0305.Number of Islands II
- 0306.Additive Number
- 0307.Range Sum Query - Mutable
- 0308.Range Sum Query 2D - Mutable
- 0309.Best Time to Buy and Sell Stock with Cooldown
- 0310.Minimum Height Trees
- 0311.Sparse Matrix Multiplication
- 0312.Burst Balloons
- 0313.Super Ugly Number
- 0314.Binary Tree Vertical Order Traversal
- 0315.Count of Smaller Numbers After Self
- 0316.Remove Duplicate Letters
- 0317.Shortest Distance from All Buildings
- 0318.Maximum Product of Word Lengths
- 0319.Bulb Switcher
- 0320.Generalized Abbreviation
- 0321.Create Maximum Number
- 0322.Coin Change
- 0323.Number of Connected Components in an Undirected Graph
- 0324.Wiggle Sort II
- 0325.Maximum Size Subarray Sum Equals k
- 0326.Power of Three
- 0327.Count of Range Sum
- 0328.Odd Even Linked List
- 0329.Longest Increasing Path in a Matrix
- 0330.Patching Array
- 0331.Verify Preorder Serialization of a Binary Tree
- 0332.Reconstruct Itinerary
- 0333.Largest BST Subtree
- 0334.Increasing Triplet Subsequence
- 0335.Self Crossing
- 0336.Palindrome Pairs
- 0337.House Robber III
- 0338.Counting Bits
- 0339.Nested List Weight Sum
- 0340.Longest Substring with At Most K Distinct Characters
- 0341.Flatten Nested List Iterator
- 0342.Power of Four
- 0343.Integer Break
- 0344.Reverse String
- 0345.Reverse Vowels of a String
- 0346.Moving Average from Data Stream
- 0347.Top K Frequent Elements
- 0348.Design Tic-Tac-Toe
- 0349.Intersection of Two Arrays
- 0350.Intersection of Two Arrays II
- 0351.Android Unlock Patterns
- 0352.Data Stream as Disjoint Intervals
- 0353.Design Snake Game
- 0354.Russian Doll Envelopes
- 0355.Design Twitter
- 0356.Line Reflection
- 0357.Count Numbers with Unique Digits
- 0358.Rearrange String k Distance Apart
- 0359.Logger Rate Limiter
- 0360.Sort Transformed Array
- 0361.Bomb Enemy
- 0362.Design Hit Counter
- 0363.Max Sum of Rectangle No Larger Than K
- 0364.Nested List Weight Sum II
- 0365.Water and Jug Problem
- 0366.Find Leaves of Binary Tree
- 0367.Valid Perfect Square
- 0368.Largest Divisible Subset
- 0369.Plus One Linked List
- 0370.Range Addition
- 0371.Sum of Two Integers
- 0372.Super Pow
- 0373.Find K Pairs with Smallest Sums
- 0374.Guess Number Higher or Lower
- 0375.Guess Number Higher or Lower II
- 0376.Wiggle Subsequence
- 0377.Combination Sum IV
- 0378.Kth Smallest Element in a Sorted Matrix
- 0379.Design Phone Directory
- 0380.Insert Delete GetRandom O(1)
- 0381.Insert Delete GetRandom O(1) - Duplicates allowed
- 0382.Linked List Random Node
- 0383.Ransom Note
- 0384.Shuffle an Array
- 0385.Mini Parser
- 0386.Lexicographical Numbers
- 0387.First Unique Character in a String
- 0388.Longest Absolute File Path
- 0389.Find the Difference
- 0390.Elimination Game
- 0391.Perfect Rectangle
- 0392.Is Subsequence
- 0393.UTF-8 Validation
- 0394.Decode String
- 0395.Longest Substring with At Least K Repeating Characters
- 0396.Rotate Function
- 0397.Integer Replacement
- 0398.Random Pick Index
- 0399.Evaluate Division
-
0400-0499
- 0400.Nth Digit
- 0401.Binary Watch
- 0402.Remove K Digits
- 0403.Frog Jump
- 0404.Sum of Left Leaves
- 0405.Convert a Number to Hexadecimal
- 0406.Queue Reconstruction by Height
- 0407.Trapping Rain Water II
- 0408.Valid Word Abbreviation
- 0409.Longest Palindrome
- 0410.Split Array Largest Sum
- 0411.Minimum Unique Word Abbreviation
- 0412.Fizz Buzz
- 0413.Arithmetic Slices
- 0414.Third Maximum Number
- 0415.Add Strings
- 0416.Partition Equal Subset Sum
- 0417.Pacific Atlantic Water Flow
- 0418.Sentence Screen Fitting
- 0419.Battleships in a Board
- 0420.Strong Password Checker
- 0421.Maximum XOR of Two Numbers in an Array
- 0422.Valid Word Square
- 0423.Reconstruct Original Digits from English
- 0424.Longest Repeating Character Replacement
- 0425.Word Squares
- 0426.Convert Binary Search Tree to Sorted Doubly Linked List
- 0427.Construct Quad Tree
- 0428.Serialize and Deserialize N-ary Tree
- 0429.N-ary Tree Level Order Traversal
- 0430.Flatten a Multilevel Doubly Linked List
- 0431.Encode N-ary Tree to Binary Tree
- 0432.All O`one Data Structure
- 0433.Minimum Genetic Mutation
- 0434.Number of Segments in a String
- 0435.Non-overlapping Intervals
- 0436.Find Right Interval
- 0437.Path Sum III
- 0438.Find All Anagrams in a String
- 0439.Ternary Expression Parser
- 0440.K-th Smallest in Lexicographical Order
- 0441.Arranging Coins
- 0442.Find All Duplicates in an Array
- 0443.String Compression
- 0444.Sequence Reconstruction
- 0445.Add Two Numbers II
- 0446.Arithmetic Slices II - Subsequence
- 0447.Number of Boomerangs
- 0448.Find All Numbers Disappeared in an Array
- 0449.Serialize and Deserialize BST
- 0450.Delete Node in a BST
- 0451.Sort Characters By Frequency
- 0452.Minimum Number of Arrows to Burst Balloons
- 0453.Minimum Moves to Equal Array Elements
- 0454.4Sum II
- 0455.Assign Cookies
- 0456.132 Pattern
- 0457.Circular Array Loop
- 0458.Poor Pigs
- 0459.Repeated Substring Pattern
- 0460.LFU Cache
- 0461.Hamming Distance
- 0462.Minimum Moves to Equal Array Elements II
- 0463.Island Perimeter
- 0464.Can I Win
- 0465.Optimal Account Balancing
- 0466.Count The Repetitions
- 0467.Unique Substrings in Wraparound String
- 0468.Validate IP Address
- 0469.Convex Polygon
- 0470.Implement Rand10() Using Rand7()
- 0471.Encode String with Shortest Length
- 0472.Concatenated Words
- 0473.Matchsticks to Square
- 0474.Ones and Zeroes
- 0475.Heaters
- 0476.Number Complement
- 0477.Total Hamming Distance
- 0478.Generate Random Point in a Circle
- 0479.Largest Palindrome Product
- 0480.Sliding Window Median
- 0481.Magical String
- 0482.License Key Formatting
- 0483.Smallest Good Base
- 0484.Find Permutation
- 0485.Max Consecutive Ones
- 0486.Predict the Winner
- 0487.Max Consecutive Ones II
- 0488.Zuma Game
- 0489.Robot Room Cleaner
- 0490.The Maze
- 0491.Increasing Subsequences
- 0492.Construct the Rectangle
- 0493.Reverse Pairs
- 0494.Target Sum
- 0495.Teemo Attacking
- 0496.Next Greater Element I
- 0497.Random Point in Non-overlapping Rectangles
- 0498.Diagonal Traverse
- 0499.The Maze III
-
0500-0599
- 0500.Keyboard Row
- 0501.Find Mode in Binary Search Tree
- 0502.IPO
- 0503.Next Greater Element II
- 0504.Base 7
- 0505.The Maze II
- 0506.Relative Ranks
- 0507.Perfect Number
- 0508.Most Frequent Subtree Sum
- 0509.Fibonacci Number
- 0510.Inorder Successor in BST II
- 0511.Game Play Analysis I
- 0512.Game Play Analysis II
- 0513.Find Bottom Left Tree Value
- 0514.Freedom Trail
- 0515.Find Largest Value in Each Tree Row
- 0516.Longest Palindromic Subsequence
- 0517.Super Washing Machines
- 0518.Coin Change 2
- 0519.Random Flip Matrix
- 0520.Detect Capital
- 0521.Longest Uncommon Subsequence I
- 0522.Longest Uncommon Subsequence II
- 0523.Continuous Subarray Sum
- 0524.Longest Word in Dictionary through Deleting
- 0525.Contiguous Array
- 0526.Beautiful Arrangement
- 0527.Word Abbreviation
- 0528.Random Pick with Weight
- 0529.Minesweeper
- 0530.Minimum Absolute Difference in BST
- 0531.Lonely Pixel I
- 0532.K-diff Pairs in an Array
- 0533.Lonely Pixel II
- 0534.Game Play Analysis III
- 0535.Encode and Decode TinyURL
- 0536.Construct Binary Tree from String
- 0537.Complex Number Multiplication
- 0538.Convert BST to Greater Tree
- 0539.Minimum Time Difference
- 0540.Single Element in a Sorted Array
- 0541.Reverse String II
- 0542.01 Matrix
- 0543.Diameter of Binary Tree
- 0544.Output Contest Matches
- 0545.Boundary of Binary Tree
- 0546.Remove Boxes
- 0547.Friend Circles
- 0548.Split Array with Equal Sum
- 0549.Binary Tree Longest Consecutive Sequence II
- 0550.Game Play Analysis IV
- 0551.Student Attendance Record I
- 0552.Student Attendance Record II
- 0553.Optimal Division
- 0554.Brick Wall
- 0555.Split Concatenated Strings
- 0556.Next Greater Element III
- 0557.Reverse Words in a String III
- 0558.Logical OR of Two Binary Grids Represented as Quad-Trees
- 0559.Maximum Depth of N-ary Tree
- 0560.Subarray Sum Equals K
- 0561.Array Partition I
- 0562.Longest Line of Consecutive One in Matrix
- 0563.Binary Tree Tilt
- 0564.Find the Closest Palindrome
- 0565.Array Nesting
- 0566.Reshape the Matrix
- 0567.Permutation in String
- 0568.Maximum Vacation Days
- 0569.Median Employee Salary
- 0570.Managers with at Least 5 Direct Reports
- 0571.Find Median Given Frequency of Numbers
- 0572.Subtree of Another Tree
- 0573.Squirrel Simulation
- 0574.Winning Candidate
- 0575.Distribute Candies
- 0576.Out of Boundary Paths
- 0577.Employee Bonus
- 0578.Get Highest Answer Rate Question
- 0579.Find Cumulative Salary of an Employee
- 0580.Count Student Number in Departments
- 0581.Shortest Unsorted Continuous Subarray
- 0582.Kill Process
- 0583.Delete Operation for Two Strings
- 0584.Find Customer Referee
- 0585.Investments in 2016
- 0586.Customer Placing the Largest Number of Orders
- 0587.Erect the Fence
- 0588.Design In-Memory File System
- 0589.N-ary Tree Preorder Traversal
- 0590.N-ary Tree Postorder Traversal
- 0591.Tag Validator
- 0592.Fraction Addition and Subtraction
- 0593.Valid Square
- 0594.Longest Harmonious Subsequence
- 0595.Big Countries
- 0596.Classes More Than 5 Students
- 0597.Friend Requests I Overall Acceptance Rate
- 0597.Friend Requests I Overall Acceptance Rate
- 0598.Range Addition II
- 0599.Minimum Index Sum of Two Lists
-
0600-0699
- 0600.Non-negative Integers without Consecutive Ones
- 0601.Human Traffic of Stadium
- 0602.Friend Requests II Who Has the Most Friends
- 0602.Friend Requests II Who Has the Most Friends
- 0603.Consecutive Available Seats
- 0604.Design Compressed String Iterator
- 0605.Can Place Flowers
- 0606.Construct String from Binary Tree
- 0607.Sales Person
- 0608.Tree Node
- 0609.Find Duplicate File in System
- 0610.Triangle Judgement
- 0611.Valid Triangle Number
- 0612.Shortest Distance in a Plane
- 0613.Shortest Distance in a Line
- 0614.Second Degree Follower
- 0615.Average Salary Departments VS Company
- 0615.Average Salary Departments VS Company
- 0616.Add Bold Tag in String
- 0617.Merge Two Binary Trees
- 0618.Students Report By Geography
- 0619.Biggest Single Number
- 0620.Not Boring Movies
- 0621.Task Scheduler
- 0622.Design Circular Queue
- 0623.Add One Row to Tree
- 0624.Maximum Distance in Arrays
- 0625.Minimum Factorization
- 0626.Exchange Seats
- 0627.Swap Salary
- 0628.Maximum Product of Three Numbers
- 0629.K Inverse Pairs Array
- 0630.Course Schedule III
- 0631.Design Excel Sum Formula
- 0632.Smallest Range Covering Elements from K Lists
- 0633.Sum of Square Numbers
- 0634.Find the Derangement of An Array
- 0635.Design Log Storage System
- 0636.Exclusive Time of Functions
- 0637.Average of Levels in Binary Tree
- 0638.Shopping Offers
- 0639.Decode Ways II
- 0640.Solve the Equation
- 0641.Design Circular Deque
- 0642.Design Search Autocomplete System
- 0643.Maximum Average Subarray I
- 0644.Maximum Average Subarray II
- 0645.Set Mismatch
- 0646.Maximum Length of Pair Chain
- 0647.Palindromic Substrings
- 0648.Replace Words
- 0649.Dota2 Senate
- 0650.2 Keys Keyboard
- 0651.4 Keys Keyboard
- 0652.Find Duplicate Subtrees
- 0653.Two Sum IV - Input is a BST
- 0654.Maximum Binary Tree
- 0655.Print Binary Tree
- 0656.Coin Path
- 0657.Robot Return to Origin
- 0658.Find K Closest Elements
- 0659.Split Array into Consecutive Subsequences
- 0660.Remove 9
- 0661.Image Smoother
- 0662.Maximum Width of Binary Tree
- 0663.Equal Tree Partition
- 0664.Strange Printer
- 0665.Non-decreasing Array
- 0666.Path Sum IV
- 0667.Beautiful Arrangement II
- 0668.Kth Smallest Number in Multiplication Table
- 0669.Trim a Binary Search Tree
- 0670.Maximum Swap
- 0671.Second Minimum Node In a Binary Tree
- 0672.Bulb Switcher II
- 0673.Number of Longest Increasing Subsequence
- 0674.Longest Continuous Increasing Subsequence
- 0675.Cut Off Trees for Golf Event
- 0676.Implement Magic Dictionary
- 0677.Map Sum Pairs
- 0678.Valid Parenthesis String
- 0679.24 Game
- 0680.Valid Palindrome II
- 0681.Next Closest Time
- 0682.Baseball Game
- 0683.K Empty Slots
- 0684.Redundant Connection
- 0685.Redundant Connection II
- 0686.Repeated String Match
- 0687.Longest Univalue Path
- 0688.Knight Probability in Chessboard
- 0689.Maximum Sum of 3 Non-Overlapping Subarrays
- 0690.Employee Importance
- 0691.Stickers to Spell Word
- 0692.Top K Frequent Words
- 0693.Binary Number with Alternating Bits
- 0694.Number of Distinct Islands
- 0695.Max Area of Island
- 0696.Count Binary Substrings
- 0697.Degree of an Array
- 0698.Partition to K Equal Sum Subsets
- 0699.Falling Squares
-
0700-0799
- 0700.Search in a Binary Search Tree
- 0701.Insert into a Binary Search Tree
- 0702.Search in a Sorted Array of Unknown Size
- 0703.Kth Largest Element in a Stream
- 0704.Binary Search
- 0705.Design HashSet
- 0706.Design HashMap
- 0707.Design Linked List
- 0708.Insert into a Sorted Circular Linked List
- 0709.To Lower Case
- 0710.Random Pick with Blacklist
- 0711.Number of Distinct Islands II
- 0712.Minimum ASCII Delete Sum for Two Strings
- 0713.Subarray Product Less Than K
- 0714.Best Time to Buy and Sell Stock with Transaction Fee
- 0715.Range Module
- 0716.Max Stack
- 0717.1-bit and 2-bit Characters
- 0718.Maximum Length of Repeated Subarray
- 0719.Find K-th Smallest Pair Distance
- 0720.Longest Word in Dictionary
- 0721.Accounts Merge
- 0722.Remove Comments
- 0723.Candy Crush
- 0724.Find Pivot Index
- 0725.Split Linked List in Parts
- 0726.Number of Atoms
- 0727.Minimum Window Subsequence
- 0728.Self Dividing Numbers
- 0729.My Calendar I
- 0730.Count Different Palindromic Subsequences
- 0731.My Calendar II
- 0732.My Calendar III
- 0733.Flood Fill
- 0734.Sentence Similarity
- 0735.Asteroid Collision
- 0736.Parse Lisp Expression
- 0737.Sentence Similarity II
- 0738.Monotone Increasing Digits
- 0739.Daily Temperatures
- 0740.Delete and Earn
- 0741.Cherry Pickup
- 0742.Closest Leaf in a Binary Tree
- 0743.Network Delay Time
- 0744.Find Smallest Letter Greater Than Target
- 0745.Prefix and Suffix Search
- 0746.Min Cost Climbing Stairs
- 0747.Largest Number At Least Twice of Others
- 0748.Shortest Completing Word
- 0749.Contain Virus
- 0750.Number Of Corner Rectangles
- 0751.IP to CIDR
- 0752.Open the Lock
- 0753.Cracking the Safe
- 0754.Reach a Number
- 0755.Pour Water
- 0756.Pyramid Transition Matrix
- 0757.Set Intersection Size At Least Two
- 0758.Bold Words in String
- 0759.Employee Free Time
- 0760.Find Anagram Mappings
- 0761.Special Binary String
- 0762.Prime Number of Set Bits in Binary Representation
- 0763.Partition Labels
- 0764.Largest Plus Sign
- 0765.Couples Holding Hands
- 0766.Toeplitz Matrix
- 0767.Reorganize String
- 0768.Max Chunks To Make Sorted II
- 0769.Max Chunks To Make Sorted
- 0770.Basic Calculator IV
- 0771.Jewels and Stones
- 0772.Basic Calculator III
- 0773.Sliding Puzzle
- 0774.Minimize Max Distance to Gas Station
- 0775.Global and Local Inversions
- 0776.Split BST
- 0777.Swap Adjacent in LR String
- 0778.Swim in Rising Water
- 0779.K-th Symbol in Grammar
- 0780.Reaching Points
- 0781.Rabbits in Forest
- 0782.Transform to Chessboard
- 0783.Minimum Distance Between BST Nodes
- 0784.Letter Case Permutation
- 0785.Is Graph Bipartite
- 0786.K-th Smallest Prime Fraction
- 0787.Cheapest Flights Within K Stops
- 0788.Rotated Digits
- 0789.Escape The Ghosts
- 0790.Domino and Tromino Tiling
- 0791.Custom Sort String
- 0792.Number of Matching Subsequences
- 0793.Preimage Size of Factorial Zeroes Function
- 0794.Valid Tic-Tac-Toe State
- 0795.Number of Subarrays with Bounded Maximum
- 0796.Rotate String
- 0797.All Paths From Source to Target
- 0798.Smallest Rotation with Highest Score
- 0799.Champagne Tower
-
0800-0899
- 0800.Similar RGB Color
- 0801.Minimum Swaps To Make Sequences Increasing
- 0802.Find Eventual Safe States
- 0803.Bricks Falling When Hit
- 0804.Unique Morse Code Words
- 0805.Split Array With Same Average
- 0806.Number of Lines To Write String
- 0807.Max Increase to Keep City Skyline
- 0808.Soup Servings
- 0809.Expressive Words
- 0810.Chalkboard XOR Game
- 0811.Subdomain Visit Count
- 0812.Largest Triangle Area
- 0813.Largest Sum of Averages
- 0814.Binary Tree Pruning
- 0815.Bus Routes
- 0816.Ambiguous Coordinates
- 0817.Linked List Components
- 0818.Race Car
- 0819.Most Common Word
- 0820.Short Encoding of Words
- 0821.Shortest Distance to a Character
- 0822.Card Flipping Game
- 0823.Binary Trees With Factors
- 0824.Goat Latin
- 0825.Friends Of Appropriate Ages
- 0826.Most Profit Assigning Work
- 0827.Making A Large Island
- 0828.Count Unique Characters of All Substrings of a Given String
- 0829.Consecutive Numbers Sum
- 0830.Positions of Large Groups
- 0831.Masking Personal Information
- 0832.Flipping an Image
- 0833.Find And Replace in String
- 0834.Sum of Distances in Tree
- 0835.Image Overlap
- 0836.Rectangle Overlap
- 0837.New 21 Game
- 0838.Push Dominoes
- 0839.Similar String Groups
- 0840.Magic Squares In Grid
- 0841.Keys and Rooms
- 0842.Split Array into Fibonacci Sequence
- 0843.Guess the Word
- 0844.Backspace String Compare
- 0845.Longest Mountain in Array
- 0846.Hand of Straights
- 0847.Shortest Path Visiting All Nodes
- 0848.Shifting Letters
- 0849.Maximize Distance to Closest Person
- 0850.Rectangle Area II
- 0851.Loud and Rich
- 0852.Peak Index in a Mountain Array
- 0853.Car Fleet
- 0854.K-Similar Strings
- 0855.Exam Room
- 0856.Score of Parentheses
- 0857.Minimum Cost to Hire K Workers
- 0858.Mirror Reflection
- 0859.Buddy Strings
- 0860.Lemonade Change
- 0861.Score After Flipping Matrix
- 0862.Shortest Subarray with Sum at Least K
- 0863.All Nodes Distance K in Binary Tree
- 0864.Shortest Path to Get All Keys
- 0865.Smallest Subtree with all the Deepest Nodes
- 0866.Prime Palindrome
- 0867.Transpose Matrix
- 0868.Binary Gap
- 0869.Reordered Power of 2
- 0870.Advantage Shuffle
- 0871.Minimum Number of Refueling Stops
- 0872.Leaf-Similar Trees
- 0873.Length of Longest Fibonacci Subsequence
- 0874.Walking Robot Simulation
- 0875.Koko Eating Bananas
- 0876.Middle of the Linked List
- 0877.Stone Game
- 0878.Nth Magical Number
- 0879.Profitable Schemes
- 0880.Decoded String at Index
- 0881.Boats to Save People
- 0882.Reachable Nodes In Subdivided Graph
- 0883.Projection Area of 3D Shapes
- 0884.Uncommon Words from Two Sentences
- 0885.Spiral Matrix III
- 0886.Possible Bipartition
- 0887.Super Egg Drop
- 0888.Fair Candy Swap
- 0889.Construct Binary Tree from Preorder and Postorder Traversal
- 0890.Find and Replace Pattern
- 0891.Sum of Subsequence Widths
- 0892.Surface Area of 3D Shapes
- 0893.Groups of Special-Equivalent Strings
- 0894.All Possible Full Binary Trees
- 0895.Maximum Frequency Stack
- 0896.Monotonic Array
- 0897.Increasing Order Search Tree
- 0898.Bitwise ORs of Subarrays
- 0899.Orderly Queue
-
0900-0999
- 0900.RLE Iterator
- 0901.Online Stock Span
- 0902.Numbers At Most N Given Digit Set
- 0903.Valid Permutations for DI Sequence
- 0904.Fruit Into Baskets
- 0905.Sort Array By Parity
- 0906.Super Palindromes
- 0907.Sum of Subarray Minimums
- 0908.Smallest Range I
- 0909.Snakes and Ladders
- 0910.Smallest Range II
- 0911.Online Election
- 0912.Sort an Array
- 0913.Cat and Mouse
- 0914.X of a Kind in a Deck of Cards
- 0915.Partition Array into Disjoint Intervals
- 0916.Word Subsets
- 0917.Reverse Only Letters
- 0918.Maximum Sum Circular Subarray
- 0919.Complete Binary Tree Inserter
- 0920.Number of Music Playlists
- 0921.Minimum Add to Make Parentheses Valid
- 0922.Sort Array By Parity II
- 0923.3Sum With Multiplicity
- 0924.Minimize Malware Spread
- 0925.Long Pressed Name
- 0926.Flip String to Monotone Increasing
- 0927.Three Equal Parts
- 0928.Minimize Malware Spread II
- 0929.Unique Email Addresses
- 0930.Binary Subarrays With Sum
- 0931.Minimum Falling Path Sum
- 0932.Beautiful Array
- 0933.Number of Recent Calls
- 0934.Shortest Bridge
- 0935.Knight Dialer
- 0936.Stamping The Sequence
- 0937.Reorder Data in Log Files
- 0938.Range Sum of BST
- 0939.Minimum Area Rectangle
- 0940.Distinct Subsequences II
- 0941.Valid Mountain Array
- 0942.DI String Match
- 0943.Find the Shortest Superstring
- 0944.Delete Columns to Make Sorted
- 0945.Minimum Increment to Make Array Unique
- 0946.Validate Stack Sequences
- 0947.Most Stones Removed with Same Row or Column
- 0948.Bag of Tokens
- 0949.Largest Time for Given Digits
- 0950.Reveal Cards In Increasing Order
- 0951.Flip Equivalent Binary Trees
- 0952.Largest Component Size by Common Factor
- 0953.Verifying an Alien Dictionary
- 0954.Array of Doubled Pairs
- 0955.Delete Columns to Make Sorted II
- 0956.Tallest Billboard
- 0957.Prison Cells After N Days
- 0958.Check Completeness of a Binary Tree
- 0959.Regions Cut By Slashes
- 0960.Delete Columns to Make Sorted III
- 0961.N-Repeated Element in Size 2N Array
- 0962.Maximum Width Ramp
- 0963.Minimum Area Rectangle II
- 0964.Least Operators to Express Number
- 0965.Univalued Binary Tree
- 0966.Vowel Spellchecker
- 0967.Numbers With Same Consecutive Differences
- 0968.Binary Tree Cameras
- 0969.Pancake Sorting
- 0970.Powerful Integers
- 0971.Flip Binary Tree To Match Preorder Traversal
- 0972.Equal Rational Numbers
- 0973.K Closest Points to Origin
- 0974.Subarray Sums Divisible by K
- 0975.Odd Even Jump
- 0976.Largest Perimeter Triangle
- 0977.Squares of a Sorted Array
- 0978.Longest Turbulent Subarray
- 0979.Distribute Coins in Binary Tree
- 0980.Unique Paths III
- 0981.Time Based Key-Value Store
- 0982.Triples with Bitwise AND Equal To Zero
- 0983.Minimum Cost For Tickets
- 0984.String Without AAA or BBB
- 0985.Sum of Even Numbers After Queries
- 0986.Interval List Intersections
- 0987.Vertical Order Traversal of a Binary Tree
- 0988.Smallest String Starting From Leaf
- 0989.Add to Array-Form of Integer
- 0990.Satisfiability of Equality Equations
- 0991.Broken Calculator
- 0992.Subarrays with K Different Integers
- 0993.Cousins in Binary Tree
- 0994.Rotting Oranges
- 0995.Minimum Number of K Consecutive Bit Flips
- 0996.Number of Squareful Arrays
- 0997.Find the Town Judge
- 0998.Maximum Binary Tree II
- 0999.Available Captures for Rook
-
1000-1099
- 1000.Minimum Cost to Merge Stones
- 1001.Grid Illumination
- 1002.Find Common Characters
- 1003.Check If Word Is Valid After Substitutions
- 1004.Max Consecutive Ones III
- 1005.Maximize Sum Of Array After K Negations
- 1006.Clumsy Factorial
- 1007.Minimum Domino Rotations For Equal Row
- 1008.Construct Binary Search Tree from Preorder Traversal
- 1009.Complement of Base 10 Integer
- 1010.Pairs of Songs With Total Durations Divisible by 60
- 1011.Capacity To Ship Packages Within D Days
- 1012.Complement of Base 10 Integer
- 1012.Numbers With Repeated Digits
- 1013.Pairs of Songs With Total Durations Divisible by 60
- 1013.Partition Array Into Three Parts With Equal Sum
- 1014.Best Sightseeing Pair
- 1014.Capacity To Ship Packages Within D Days
- 1015.Smallest Integer Divisible by K
- 1016.Binary String With Substrings Representing 1 To N
- 1017.Convert to Base -2
- 1018.Binary Prefix Divisible By 5
- 1019.Next Greater Node In Linked List
- 1020.Number of Enclaves
- 1020.Partition Array Into Three Parts With Equal Sum
- 1021.Best Sightseeing Pair
- 1021.Remove Outermost Parentheses
- 1022.Smallest Integer Divisible by K
- 1022.Sum of Root To Leaf Binary Numbers
- 1023.Binary String With Substrings Representing 1 To N
- 1023.Camelcase Matching
- 1024.Video Stitching
- 1025.Divisor Game
- 1026.Maximum Difference Between Node and Ancestor
- 1027.Longest Arithmetic Subsequence
- 1028.Recover a Tree From Preorder Traversal
- 1029.Two City Scheduling
- 1030.Matrix Cells in Distance Order
- 1031.Maximum Sum of Two Non-Overlapping Subarrays
- 1032.Stream of Characters
- 1033.Moving Stones Until Consecutive
- 1034.Coloring A Border
- 1035.Uncrossed Lines
- 1036.Escape a Large Maze
- 1037.Valid Boomerang
- 1038.Binary Search Tree to Greater Sum Tree
- 1039.Minimum Score Triangulation of Polygon
- 1040.Moving Stones Until Consecutive II
- 1041.Robot Bounded In Circle
- 1042.Flower Planting With No Adjacent
- 1043.Partition Array for Maximum Sum
- 1044.Longest Duplicate Substring
- 1045.Customers Who Bought All Products
- 1046.Last Stone Weight
- 1047.Remove All Adjacent Duplicates In String
- 1048.Longest String Chain
- 1049.Last Stone Weight I
- 1049.Last Stone Weight II
- 1050.Actors and Directors Who Cooperated At Least Three Times
- 1051.Height Checker
- 1052.Grumpy Bookstore Owner
- 1053.Previous Permutation With One Swap
- 1054.Distant Barcodes
- 1055.Shortest Way to Form String
- 1056.Confusing Number
- 1057.Campus Bikes
- 1058.Minimize Rounding Error to Meet Target
- 1059.All Paths from Source Lead to Destination
- 1060.Missing Element in Sorted Array
- 1061.Lexicographically Smallest Equivalent String
- 1062.Longest Repeating Substring
- 1063.Number of Valid Subarrays
- 1064.Fixed Point
- 1065.Index Pairs of a String
- 1066.Campus Bikes II
- 1067.Digit Count in Range
- 1068.Product Sales Analysis I
- 1069.Product Sales Analysis II
- 1070.Product Sales Analysis III
- 1071.Greatest Common Divisor of Strings
- 1072.Flip Columns For Maximum Number of Equal Rows
- 1073.Adding Two Negabinary Numbers
- 1074.Number of Submatrices That Sum to Target
- 1075.Project Employees I
- 1076.Project Employees II
- 1077.Project Employees III
- 1078.Occurrences After Bigram
- 1079.Letter Tile Possibilities
- 1080.Insufficient Nodes in Root to Leaf Paths
- 1081.Smallest Subsequence of Distinct Characters
- 1082.Sales Analysis I
- 1083.Sales Analysis II
- 1084.Sales Analysis III
- 1085.Sum of Digits in the Minimum Number
- 1086.High Five
- 1087.Brace Expansion
- 1088.Confusing Number II
- 1089.Duplicate Zeros
- 1090.Largest Values From Labels
- 1091.Shortest Path in Binary Matrix
- 1092.Shortest Common Supersequence
- 1093.Statistics from a Large Sample
- 1094.Car Pooling
- 1095.Find in Mountain Array
- 1096.Brace Expansion II
- 1097.Game Play Analysis V
- 1098.Unpopular Books
- 1099.Two Sum Less Than K
-
1100-1199
- 1100.Find K-Length Substrings With No Repeated Characters
- 1101.The Earliest Moment When Everyone Become Friends
- 1102.Path With Maximum Minimum Value
- 1103.Distribute Candies to People
- 1104.Path In Zigzag Labelled Binary Tree
- 1105.Filling Bookcase Shelves
- 1106.Parsing A Boolean Expression
- 1107.New Users Daily Count
- 1108.Defanging an IP Address
- 1109.Corporate Flight Bookings
- 1110.Delete Nodes And Return Forest
- 1111.Maximum Nesting Depth of Two Valid Parentheses Strings
- 1112.Highest Grade For Each Student
- 1113.Reported Posts
- 1114.Print in Order
- 1115.Print FooBar Alternately
- 1116.Print Zero Even Odd
- 1117.Building H2O
- 1118.Number of Days in a Month
- 1119.Remove Vowels from a String
- 1120.Maximum Average Subtree
- 1121.Divide Array Into Increasing Sequences
- 1122.Relative Sort Array
- 1123.Lowest Common Ancestor of Deepest Leaves
- 1124.Longest Well-Performing Interval
- 1125.Smallest Sufficient Team
- 1126.Active Businesses
- 1127.User Purchase Platform
- 1128.Number of Equivalent Domino Pairs
- 1129.Shortest Path with Alternating Colors
- 1130.Minimum Cost Tree From Leaf Values
- 1131.Maximum of Absolute Value Expression
- 1132.Reported Posts II
- 1133.Largest Unique Number
- 1134.Armstrong Number
- 1135.Connecting Cities With Minimum Cost
- 1136.Parallel Courses
- 1137.N-th Tribonacci Number
- 1138.Alphabet Board Path
- 1139.Largest 1-Bordered Square
- 1140.Stone Game II
- 1141.User Activity for the Past 30 Days I
- 1142.User Activity for the Past 30 Days II
- 1143.Longest Common Subsequence
- 1144.Decrease Elements To Make Array Zigzag
- 1145.Binary Tree Coloring Game
- 1146.Snapshot Array
- 1147.Longest Chunked Palindrome Decomposition
- 1148.Article Views I
- 1149.Article Views II
- 1150.Check If a Number Is Majority Element in a Sorted Array
- 1151.Minimum Swaps to Group All 1's Together
- 1152.Analyze User Website Visit Pattern
- 1153.String Transforms Into Another String
- 1154.Day of the Year
- 1155.Number of Dice Rolls With Target Sum
- 1156.Swap For Longest Repeated Character Substring
- 1157.Online Majority Element In Subarray
- 1158.Market Analysis I
- 1159.Market Analysis II
- 1160.Find Words That Can Be Formed by Characters
- 1161.Maximum Level Sum of a Binary Tree
- 1162.As Far from Land as Possible
- 1163.Last Substring in Lexicographical Order
- 1164.Product Price at a Given Date
- 1165.Single-Row Keyboard
- 1166.Design File System
- 1167.Minimum Cost to Connect Sticks
- 1168.Optimize Water Distribution in a Village
- 1169.Invalid Transactions
- 1170.Compare Strings by Frequency of the Smallest Character
- 1171.Remove Zero Sum Consecutive Nodes from Linked List
- 1172.Dinner Plate Stacks
- 1173.Immediate Food Delivery I
- 1174.Immediate Food Delivery II
- 1175.Prime Arrangements
- 1176.Diet Plan Performance
- 1177.Can Make Palindrome from Substring
- 1178.Number of Valid Words for Each Puzzle
- 1179.Reformat Department Table
- 1180.Count Substrings with Only One Distinct Letter
- 1181.Before and After Puzzle
- 1182.Shortest Distance to Target Color
- 1183.Maximum Number of Ones
- 1184.Distance Between Bus Stops
- 1185.Day of the Week
- 1186.Maximum Subarray Sum with One Deletion
- 1187.Make Array Strictly Increasing
- 1188.Design Bounded Blocking Queue
- 1189.Maximum Number of Balloons
- 1190.Reverse Substrings Between Each Pair of Parentheses
- 1191.K-Concatenation Maximum Sum
- 1192.Critical Connections in a Network
- 1193.Monthly Transactions I
- 1194.Tournament Winners
- 1195.Fizz Buzz Multithreaded
- 1196.How Many Apples Can You Put into the Basket
- 1197.Minimum Knight Moves
- 1198.Find Smallest Common Element in All Rows
- 1199.Minimum Time to Build Blocks
-
1200-1299
- 1200.Minimum Absolute Difference
- 1201.Ugly Number III
- 1202.Smallest String With Swaps
- 1203.Sort Items by Groups Respecting Dependencies
- 1204.Last Person to Fit in the Elevator
- 1205.Monthly Transactions II
- 1206.Design Skiplist
- 1207.Unique Number of Occurrences
- 1208.Get Equal Substrings Within Budget
- 1209.Remove All Adjacent Duplicates in String II
- 1210.Minimum Moves to Reach Target with Rotations
- 1211.Queries Quality and Percentage
- 1212.Team Scores in Football Tournament
- 1213.Intersection of Three Sorted Arrays
- 1214.Two Sum BSTs
- 1215.Stepping Numbers
- 1216.Valid Palindrome III
- 1217.Minimum Cost to Move Chips to The Same Position
- 1218.Longest Arithmetic Subsequence of Given Difference
- 1219.Path with Maximum Gold
- 1220.Count Vowels Permutation
- 1221.Split a String in Balanced Strings
- 1222.Queens That Can Attack the King
- 1223.Dice Roll Simulation
- 1224.Maximum Equal Frequency
- 1225.Report Contiguous Dates
- 1226.The Dining Philosophers
- 1227.Airplane Seat Assignment Probability
- 1228.Missing Number In Arithmetic Progression
- 1229.Meeting Scheduler
- 1230.Toss Strange Coins
- 1231.Divide Chocolate
- 1232.Check If It Is a Straight Line
- 1233.Remove Sub-Folders from the Filesystem
- 1234.Replace the Substring for Balanced String
- 1235.Maximum Profit in Job Scheduling
- 1236.Web Crawler
- 1237.Find Positive Integer Solution for a Given Equation
- 1238.Circular Permutation in Binary Representation
- 1239.Maximum Length of a Concatenated String with Unique Characters
- 1240.Tiling a Rectangle with the Fewest Squares
- 1241.Number of Comments per Post
- 1242.Web Crawler Multithreaded
- 1243.Array Transformation
- 1244.Design A Leaderboard
- 1245.Tree Diameter
- 1246.Palindrome Removal
- 1247.Minimum Swaps to Make Strings Equal
- 1248.Count Number of Nice Subarrays
- 1249.Minimum Remove to Make Valid Parentheses
- 1250.Check If It Is a Good Array
- 1251.Average Selling Price
- 1252.Cells with Odd Values in a Matrix
- 1253.Reconstruct a 2-Row Binary Matrix
- 1254.Number of Closed Islands
- 1255.Maximum Score Words Formed by Letters
- 1256.Encode Number
- 1257.Smallest Common Region
- 1258.Synonymous Sentences
- 1259.Handshakes That Don't Cross
- 1260.Shift 2D Grid
- 1261.Find Elements in a Contaminated Binary Tree
- 1262.Greatest Sum Divisible by Three
- 1263.Minimum Moves to Move a Box to Their Target Location
- 1264.Page Recommendations
- 1265.Print Immutable Linked List in Reverse
- 1266.Minimum Time Visiting All Points
- 1267.Count Servers that Communicate
- 1268.Search Suggestions System
- 1269.Number of Ways to Stay in the Same Place After Some Steps
- 1270.All People Report to the Given Manager
- 1271.Hexspeak
- 1272.Remove Interval
- 1273.Delete Tree Nodes
- 1274.Number of Ships in a Rectangle
- 1275.Find Winner on a Tic Tac Toe Game
- 1276.Number of Burgers with No Waste of Ingredients
- 1277.Count Square Submatrices with All Ones
- 1278.Palindrome Partitioning III
- 1279.Traffic Light Controlled Intersection
- 1280.Students and Examinations
- 1281.Subtract the Product and Sum of Digits of an Integer
- 1282.Group the People Given the Group Size They Belong To
- 1283.Find the Smallest Divisor Given a Threshold
- 1284.Minimum Number of Flips to Convert Binary Matrix to Zero Matrix
- 1285.Find the Start and End Number of Continuous Ranges
- 1286.Iterator for Combination
- 1287.Element Appearing More Than 25% In Sorted Array
- 1288.Remove Covered Intervals
- 1289.Minimum Falling Path Sum II
- 1290.Convert Binary Number in a Linked List to Integer
- 1291.Sequential Digits
- 1292.Maximum Side Length of a Square with Sum Less than or Equal to Threshold
- 1293.Shortest Path in a Grid with Obstacles Elimination
- 1294.Weather Type in Each Country
- 1295.Find Numbers with Even Number of Digits
- 1296.Divide Array in Sets of K Consecutive Numbers
- 1297.Maximum Number of Occurrences of a Substring
- 1298.Maximum Candies You Can Get from Boxes
- 1299.Replace Elements with Greatest Element on Right Side
-
1300-1399
- 1300.Sum of Mutated Array Closest to Target
- 1301.Number of Paths with Max Score
- 1302.Deepest Leaves Sum
- 1303.Find the Team Size
- 1304.Find N Unique Integers Sum up to Zero
- 1305.All Elements in Two Binary Search Trees
- 1306.Jump Game III
- 1307.Verbal Arithmetic Puzzle
- 1308.Running Total for Different Genders
- 1309.Decrypt String from Alphabet to Integer Mapping
- 1310.XOR Queries of a Subarray
- 1311.Get Watched Videos by Your Friends
- 1312.Minimum Insertion Steps to Make a String Palindrome
- 1313.Decompress Run-Length Encoded List
- 1314.Matrix Block Sum
- 1315.Sum of Nodes with Even-Valued Grandparent
- 1316.Distinct Echo Substrings
- 1317.Convert Integer to the Sum of Two No-Zero Integers
- 1318.Minimum Flips to Make a OR b Equal to c
- 1319.Number of Operations to Make Network Connected
- 1320.Minimum Distance to Type a Word Using Two Fingers
- 1321.Restaurant Growth
- 1322.Ads Performance
- 1323.Maximum 69 Number
- 1324.Print Words Vertically
- 1325.Delete Leaves With a Given Value
- 1326.Minimum Number of Taps to Open to Water a Garden
- 1327.List the Products Ordered in a Period
- 1328.Break a Palindrome
- 1329.Sort the Matrix Diagonally
- 1330.Reverse Subarray To Maximize Array Value
- 1331.Rank Transform of an Array
- 1332.Remove Palindromic Subsequences
- 1333.Filter Restaurants by Vegan-Friendly, Price and Distance
- 1334.Find the City With the Smallest Number of Neighbors at a Threshold Distance
- 1335.Minimum Difficulty of a Job Schedule
- 1336.Number of Transactions per Visit
- 1337.The K Weakest Rows in a Matrix
- 1338.Reduce Array Size to The Half
- 1339.Maximum Product of Splitted Binary Tree
- 1340.Jump Game V
- 1341.Movie Rating
- 1342.Number of Steps to Reduce a Number to Zero
- 1343.Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold
- 1344.Angle Between Hands of a Clock
- 1345.Jump Game IV
- 1346.Check If N and Its Double Exist
- 1347.Minimum Number of Steps to Make Two Strings Anagram
- 1348.Tweet Counts Per Frequency
- 1349.Maximum Students Taking Exam
- 1350.Students With Invalid Departments
- 1351.Count Negative Numbers in a Sorted Matrix
- 1352.Product of the Last K Numbers
- 1353.Maximum Number of Events That Can Be Attended
- 1354.Construct Target Array With Multiple Sums
- 1355.Activity Participants
- 1356.Sort Integers by The Number of 1 Bits
- 1357.Apply Discount Every n Orders
- 1358.Number of Substrings Containing All Three Characters
- 1359.Count All Valid Pickup and Delivery Options
- 1360.Number of Days Between Two Dates
- 1361.Validate Binary Tree Nodes
- 1362.Closest Divisors
- 1363.Largest Multiple of Three
- 1364.Number of Trusted Contacts of a Customer
- 1365.How Many Numbers Are Smaller Than the Current Number
- 1366.Rank Teams by Votes
- 1367.Linked List in Binary Tree
- 1368.Minimum Cost to Make at Least One Valid Path in a Grid
- 1369.Get the Second Most Recent Activity
- 1370.Increasing Decreasing String
- 1371.Find the Longest Substring Containing Vowels in Even Counts
- 1372.Longest ZigZag Path in a Binary Tree
- 1373.Maximum Sum BST in Binary Tree
- 1374.Generate a String With Characters That Have Odd Counts
- 1375.Bulb Switcher III
- 1376.Time Needed to Inform All Employees
- 1377.Frog Position After T Seconds
- 1378.Replace Employee ID With The Unique Identifier
- 1379.Find a Corresponding Node of a Binary Tree in a Clone of That Tree
- 1380.Lucky Numbers in a Matrix
- 1381.Design a Stack With Increment Operation
- 1382.Balance a Binary Search Tree
- 1383.Maximum Performance of a Team
- 1384.Total Sales Amount by Year
- 1385.Find the Distance Value Between Two Arrays
- 1386.Cinema Seat Allocation
- 1387.Sort Integers by The Power Value
- 1388.Pizza With 3n Slices
- 1389.Create Target Array in the Given Order
- 1390.Four Divisors
- 1391.Check if There is a Valid Path in a Grid
- 1392.Longest Happy Prefix
- 1393.Capital Gain
- 1394.Find Lucky Integer in an Array
- 1395.Count Number of Teams
- 1396.Design Underground System
- 1397.Find All Good Strings
- 1398.Customers Who Bought Products A and B but Not C
- 1399.Count Largest Group
-
1400-1499
- 1400.Construct K Palindrome Strings
- 1401.Circle and Rectangle Overlapping
- 1402.Reducing Dishes
- 1403.Minimum Subsequence in Non-Increasing Order
- 1404.Number of Steps to Reduce a Number in Binary Representation to One
- 1405.Longest Happy String
- 1406.Stone Game III
- 1407.Top Travellers
- 1408.String Matching in an Array
- 1409.Queries on a Permutation With Key
- 1410.HTML Entity Parser
- 1411.Number of Ways to Paint N × 3 Grid
- 1412.Find the Quiet Students in All Exams
- 1413.Minimum Value to Get Positive Step by Step Sum
- 1414.Find the Minimum Number of Fibonacci Numbers Whose Sum Is K
- 1415.The k-th Lexicographical String of All Happy Strings of Length n
- 1416.Restore The Array
- 1417.Reformat The String
- 1418.Display Table of Food Orders in a Restaurant
- 1419.Minimum Number of Frogs Croaking
- 1420.Build Array Where You Can Find The Maximum Exactly K Comparisons
- 1421.NPV Queries
- 1422.Maximum Score After Splitting a String
- 1423.Maximum Points You Can Obtain from Cards
- 1424.Diagonal Traverse II
- 1425.Constrained Subsequence Sum
- 1426.Counting Elements
- 1427.Perform String Shifts
- 1428.Leftmost Column with at Least a One
- 1429.First Unique Number
- 1430.Check If a String Is a Valid Sequence from Root to Leaves Path in a Binary Tree
- 1431.Kids With the Greatest Number of Candies
- 1432.Max Difference You Can Get From Changing an Integer
- 1433.Check If a String Can Break Another String
- 1434.Number of Ways to Wear Different Hats to Each Other
- 1435.Create a Session Bar Chart
- 1436.Destination City
- 1437.Check If All 1's Are at Least Length K Places Away
- 1438.Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit
- 1439.Find the Kth Smallest Sum of a Matrix With Sorted Rows
- 1440.Evaluate Boolean Expression
- 1441.Build an Array With Stack Operations
- 1442.Count Triplets That Can Form Two Arrays of Equal XOR
- 1443.Minimum Time to Collect All Apples in a Tree
- 1444.Number of Ways of Cutting a Pizza
- 1445.Apples & Oranges
- 1446.Consecutive Characters
- 1447.Simplified Fractions
- 1448.Count Good Nodes in Binary Tree
- 1449.Form Largest Integer With Digits That Add up to Target
- 1450.Number of Students Doing Homework at a Given Time
- 1451.Rearrange Words in a Sentence
- 1452.People Whose List of Favorite Companies Is Not a Subset of Another List
- 1453.Maximum Number of Darts Inside of a Circular Dartboard
- 1454.Active Users
- 1455.Check If a Word Occurs As a Prefix of Any Word in a Sentence
- 1456.Maximum Number of Vowels in a Substring of Given Length
- 1457.Pseudo-Palindromic Paths in a Binary Tree
- 1458.Max Dot Product of Two Subsequences
- 1459.Rectangles Area
- 1460.Make Two Arrays Equal by Reversing Sub-arrays
- 1461.Check If a String Contains All Binary Codes of Size K
- 1462.Course Schedule IV
- 1463.Cherry Pickup II
- 1464.Maximum Product of Two Elements in an Array
- 1465.Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts
- 1466.Reorder Routes to Make All Paths Lead to the City Zero
- 1467.Probability of a Two Boxes Having The Same Number of Distinct Balls
- 1468.Calculate Salaries
- 1469.Find All The Lonely Nodes
- 1470.Shuffle the Array
- 1471.The k Strongest Values in an Array
- 1472.Design Browser History
- 1473.Paint House III
- 1474.Delete N Nodes After M Nodes of a Linked List
- 1475.Final Prices With a Special Discount in a Shop
- 1476.Subrectangle Queries
- 1477.Find Two Non-overlapping Sub-arrays Each With Target Sum
- 1478.Allocate Mailboxes
- 1479.Sales by Day of the Week
- 1480.Running Sum of 1d Array
- 1481.Least Number of Unique Integers after K Removals
- 1482.Minimum Number of Days to Make m Bouquets
- 1483.Kth Ancestor of a Tree Node
- 1484.Group Sold Products By The Date
- 1485.Clone Binary Tree With Random Pointer
- 1486.XOR Operation in an Array
- 1487.Making File Names Unique
- 1488.Avoid Flood in The City
- 1489.Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree
- 1490.Clone N-ary Tree
- 1491.Average Salary Excluding the Minimum and Maximum Salary
- 1492.The kth Factor of n
- 1493.Longest Subarray of 1's After Deleting One Element
- 1494.Parallel Courses II
- 1495.Friendly Movies Streamed Last Month
- 1496.Path Crossing
- 1497.Check If Array Pairs Are Divisible by k
- 1498.Number of Subsequences That Satisfy the Given Sum Condition
- 1499.Max Value of Equation
-
1500-1599
- 1500.Design a File Sharing System
- 1501.Countries You Can Safely Invest In
- 1502.Can Make Arithmetic Progression From Sequence
- 1503.Last Moment Before All Ants Fall Out of a Plank
- 1504.Count Submatrices With All Ones
- 1505.Minimum Possible Integer After at Most K Adjacent Swaps On Digits
- 1506.Find Root of N-Ary Tree
- 1507.Reformat Date
- 1508.Range Sum of Sorted Subarray Sums
- 1509.Minimum Difference Between Largest and Smallest Value in Three Moves
- 1510.Stone Game IV
- 1511.Customer Order Frequency
- 1512.Number of Good Pairs
- 1513.Number of Substrings With Only 1s
- 1514.Path with Maximum Probability
- 1515.Best Position for a Service Centre
- 1516.Move Sub-Tree of N-Ary Tree
- 1517.Find Users With Valid E-Mails
- 1518.Water Bottles
- 1519.Number of Nodes in the Sub-Tree With the Same Label
- 1520.Maximum Number of Non-Overlapping Substrings
- 1521.Find a Value of a Mysterious Function Closest to Target
- 1522.Diameter of N-Ary Tree
- 1523.Count Odd Numbers in an Interval Range
- 1524.Number of Sub-arrays With Odd Sum
- 1525.Number of Good Ways to Split a String
- 1526.Minimum Number of Increments on Subarrays to Form a Target Array
- 1527.Patients With a Condition
- 1528.Shuffle String
- 1529.Bulb Switcher IV
- 1530.Number of Good Leaf Nodes Pairs
- 1531.String Compression II
- 1532.The Most Recent Three Orders
- 1533.Find the Index of the Large Integer
- 1534.Count Good Triplets
- 1535.Find the Winner of an Array Game
- 1536.Minimum Swaps to Arrange a Binary Grid
- 1537.Get the Maximum Score
- 1538.Guess the Majority in a Hidden Array
- 1539.Kth Missing Positive Number
- 1540.Can Convert String in K Moves
- 1541.Minimum Insertions to Balance a Parentheses String
- 1542.Find Longest Awesome Substring
- 1543.Fix Product Name Format
- 1544.Make The String Great
- 1545.Find Kth Bit in Nth Binary String
- 1546.Maximum Number of Non-Overlapping Subarrays With Sum Equals Target
- 1547.Minimum Cost to Cut a Stick
- 1548.The Most Similar Path in a Graph
- 1549.The Most Recent Orders for Each Product
- 1550.Three Consecutive Odds
- 1551.Minimum Operations to Make Array Equal
- 1552.Magnetic Force Between Two Balls
- 1553.Minimum Number of Days to Eat N Oranges
- 1554.Strings Differ by One Character
- 1556.Thousand Separator
- 1557.Minimum Number of Vertices to Reach All Nodes
- 1558.Minimum Numbers of Function Calls to Make Target Array
- 1559.Detect Cycles in 2D Grid
- 1560.Most Visited Sector in a Circular Track
- 1561.Maximum Number of Coins You Can Get
- 1562.Find Latest Group of Size M
- 1563.Stone Game V
- 1564.Put Boxes Into the Warehouse I
- 1566.Detect Pattern of Length M Repeated K or More Times
- 1567.Maximum Length of Subarray With Positive Product
- 1568.Minimum Number of Days to Disconnect Island
- 1569.Number of Ways to Reorder Array to Get Same BST
- 1572.Matrix Diagonal Sum
- 1573.Number of Ways to Split a String
- 1574.Shortest Subarray to be Removed to Make Array Sorted
- 1575.Count All Possible Routes
- 1576.Replace All #003F's to Avoid Consecutive Repeating Characters
- 1577.Number of Ways Where Square of Number Is Equal to Product of Two Numbers
- 1578.Minimum Deletion Cost to Avoid Repeating Letters
- 1579.Remove Max Number of Edges to Keep Graph Fully Traversable
- 1582.Special Positions in a Binary Matrix
- 1583.Count Unhappy Friends
- 1584.Min Cost to Connect All Points
- 1585.Check If String Is Transformable With Substring Sort Operations
- 1588.Sum of All Odd Length Subarrays
- 1589.Maximum Sum Obtained of Any Permutation
- 1590.Make Sum Divisible by P
- 1591.Strange Printer II
- 1592.Rearrange Spaces Between Words
- 1593.Split a String Into the Max Number of Unique Substrings
- 1594.Maximum Non Negative Product in a Matrix
- 1595.Minimum Cost to Connect Two Groups of Points
- 1598.Crawler Log Folder
- 1599.Maximum Profit of Operating a Centennial Wheel
-
5000-5099
- 5075.Number of Submatrices That Sum to Target
- 5076.Greatest Common Divisor of Strings
- 5077.Flip Columns For Maximum Number of Equal Rows
- 5078.Adding Two Negabinary Numbers
- 5083.Occurrences After Bigram
- 5084.Insufficient Nodes in Root to Leaf Paths
- 5086.Smallest Subsequence of Distinct Characters
- 5087.Letter Tile Possibilities