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docs: fixed problem difficulty consistent with LeetCode. (doocs#539)
Co-authored-by: HalfCoke <halfcokey@gmail.com>
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‎lcof/README.md

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| 题号 | 题解 | 标签 | 难度 |
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| -------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------- | ---- |
1717
| [03](https://leetcode-cn.com/problems/shu-zu-zhong-zhong-fu-de-shu-zi-lcof) | [数组中重复的数字](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9803.%20%E6%95%B0%E7%BB%84%E4%B8%AD%E9%87%8D%E5%A4%8D%E7%9A%84%E6%95%B0%E5%AD%97/README.md) | `数组`,`哈希表` | 简单 |
18-
| [04](https://leetcode-cn.com/problems/er-wei-shu-zu-zhong-de-cha-zhao-lcof) | [二维数组中的查找](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9804.%20%E4%BA%8C%E7%BB%B4%E6%95%B0%E7%BB%84%E4%B8%AD%E7%9A%84%E6%9F%A5%E6%89%BE/README.md) | `数组`,`双指针` | 简单 |
18+
| [04](https://leetcode-cn.com/problems/er-wei-shu-zu-zhong-de-cha-zhao-lcof) | [二维数组中的查找](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9804.%20%E4%BA%8C%E7%BB%B4%E6%95%B0%E7%BB%84%E4%B8%AD%E7%9A%84%E6%9F%A5%E6%89%BE/README.md) | `数组`,`双指针` | 中等 |
1919
| [05](https://leetcode-cn.com/problems/ti-huan-kong-ge-lcof) | [替换空格](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9805.%20%E6%9B%BF%E6%8D%A2%E7%A9%BA%E6%A0%BC/README.md) | | 简单 |
2020
| [06](https://leetcode-cn.com/problems/cong-wei-dao-tou-da-yin-lian-biao-lcof) | [从尾到头打印链表](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9806.%20%E4%BB%8E%E5%B0%BE%E5%88%B0%E5%A4%B4%E6%89%93%E5%8D%B0%E9%93%BE%E8%A1%A8/README.md) | | 简单 |
2121
| [07](https://leetcode-cn.com/problems/zhong-jian-er-cha-shu-lcof) | [重建二叉树](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9807.%20%E9%87%8D%E5%BB%BA%E4%BA%8C%E5%8F%89%E6%A0%91/README.md) | `树`,`递归` | 中等 |
@@ -56,7 +56,7 @@
5656
| [40](https://leetcode-cn.com/problems/zui-xiao-de-kge-shu-lcof) | [最小的 k 个数](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9840.%20%E6%9C%80%E5%B0%8F%E7%9A%84k%E4%B8%AA%E6%95%B0/README.md) | `堆`,`分治算法` | 简单 |
5757
| [41](https://leetcode-cn.com/problems/shu-ju-liu-zhong-de-zhong-wei-shu-lcof) | [数据流中的中位数](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9841.%20%E6%95%B0%E6%8D%AE%E6%B5%81%E4%B8%AD%E7%9A%84%E4%B8%AD%E4%BD%8D%E6%95%B0/README.md) | `堆`,`设计` | 困难 |
5858
| [42](https://leetcode-cn.com/problems/lian-xu-zi-shu-zu-de-zui-da-he-lcof) | [连续子数组的最大和](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9842.%20%E8%BF%9E%E7%BB%AD%E5%AD%90%E6%95%B0%E7%BB%84%E7%9A%84%E6%9C%80%E5%A4%A7%E5%92%8C/README.md) | `分治算法`,`动态规划` | 简单 |
59-
| [43](https://leetcode-cn.com/problems/1nzheng-shu-zhong-1chu-xian-de-ci-shu-lcof) | [1 ～ n 整数中 1 出现的次数](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9843.%201%EF%BD%9En%E6%95%B4%E6%95%B0%E4%B8%AD1%E5%87%BA%E7%8E%B0%E7%9A%84%E6%AC%A1%E6%95%B0/README.md) | `数学` | 中等 |
59+
| [43](https://leetcode-cn.com/problems/1nzheng-shu-zhong-1chu-xian-de-ci-shu-lcof) | [1 ～ n 整数中 1 出现的次数](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9843.%201%EF%BD%9En%E6%95%B4%E6%95%B0%E4%B8%AD1%E5%87%BA%E7%8E%B0%E7%9A%84%E6%AC%A1%E6%95%B0/README.md) | `数学` | 困难 |
6060
| [44](https://leetcode-cn.com/problems/shu-zi-xu-lie-zhong-mou-yi-wei-de-shu-zi-lcof) | [数字序列中某一位的数字](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9844.%20%E6%95%B0%E5%AD%97%E5%BA%8F%E5%88%97%E4%B8%AD%E6%9F%90%E4%B8%80%E4%BD%8D%E7%9A%84%E6%95%B0%E5%AD%97/README.md) | `数学` | 中等 |
6161
| [45](https://leetcode-cn.com/problems/ba-shu-zu-pai-cheng-zui-xiao-de-shu-lcof) | [把数组排成最小的数](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9845.%20%E6%8A%8A%E6%95%B0%E7%BB%84%E6%8E%92%E6%88%90%E6%9C%80%E5%B0%8F%E7%9A%84%E6%95%B0/README.md) | `排序` | 中等 |
6262
| [46](https://leetcode-cn.com/problems/ba-shu-zi-fan-yi-cheng-zi-fu-chuan-lcof) | [把数字翻译成字符串](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9846.%20%E6%8A%8A%E6%95%B0%E5%AD%97%E7%BF%BB%E8%AF%91%E6%88%90%E5%AD%97%E7%AC%A6%E4%B8%B2/README.md) | | 中等 |
@@ -77,15 +77,15 @@
7777
| [57 - II](https://leetcode-cn.com/problems/he-wei-sde-lian-xu-zheng-shu-xu-lie-lcof) | [和为 s 的连续正数序列](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9857%20-%20II.%20%E5%92%8C%E4%B8%BAs%E7%9A%84%E8%BF%9E%E7%BB%AD%E6%AD%A3%E6%95%B0%E5%BA%8F%E5%88%97/README.md) | | 简单 |
7878
| [58 - I](https://leetcode-cn.com/problems/fan-zhuan-dan-ci-shun-xu-lcof) | [翻转单词顺序](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9858%20-%20I.%20%E7%BF%BB%E8%BD%AC%E5%8D%95%E8%AF%8D%E9%A1%BA%E5%BA%8F/README.md) | `字符串` | 简单 |
7979
| [58 - II](https://leetcode-cn.com/problems/zuo-xuan-zhuan-zi-fu-chuan-lcof) | [左旋转字符串](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9858%20-%20II.%20%E5%B7%A6%E6%97%8B%E8%BD%AC%E5%AD%97%E7%AC%A6%E4%B8%B2/README.md) | `字符串` | 简单 |
80-
| [59 - I](https://leetcode-cn.com/problems/hua-dong-chuang-kou-de-zui-da-zhi-lcof) | [滑动窗口的最大值](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9859%20-%20I.%20%E6%BB%91%E5%8A%A8%E7%AA%97%E5%8F%A3%E7%9A%84%E6%9C%80%E5%A4%A7%E5%80%BC/README.md) | `栈` | 简单 |
80+
| [59 - I](https://leetcode-cn.com/problems/hua-dong-chuang-kou-de-zui-da-zhi-lcof) | [滑动窗口的最大值](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9859%20-%20I.%20%E6%BB%91%E5%8A%A8%E7%AA%97%E5%8F%A3%E7%9A%84%E6%9C%80%E5%A4%A7%E5%80%BC/README.md) | `栈` | 困难 |
8181
| [59 - II](https://leetcode-cn.com/problems/dui-lie-de-zui-da-zhi-lcof) | [队列的最大值](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9859%20-%20II.%20%E9%98%9F%E5%88%97%E7%9A%84%E6%9C%80%E5%A4%A7%E5%80%BC/README.md) | `栈` | 中等 |
82-
| [60](https://leetcode-cn.com/problems/nge-tou-zi-de-dian-shu-lcof) | [n 个骰子的点数](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9860.%20n%E4%B8%AA%E9%AA%B0%E5%AD%90%E7%9A%84%E7%82%B9%E6%95%B0/README.md) | | 简单 |
82+
| [60](https://leetcode-cn.com/problems/nge-tou-zi-de-dian-shu-lcof) | [n 个骰子的点数](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9860.%20n%E4%B8%AA%E9%AA%B0%E5%AD%90%E7%9A%84%E7%82%B9%E6%95%B0/README.md) | | 中等 |
8383
| [61](https://leetcode-cn.com/problems/bu-ke-pai-zhong-de-shun-zi-lcof) | [扑克牌中的顺子](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9861.%20%E6%89%91%E5%85%8B%E7%89%8C%E4%B8%AD%E7%9A%84%E9%A1%BA%E5%AD%90/README.md) | | 简单 |
8484
| [62](https://leetcode-cn.com/problems/yuan-quan-zhong-zui-hou-sheng-xia-de-shu-zi-lcof) | [圆圈中最后剩下的数字](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9862.%20%E5%9C%86%E5%9C%88%E4%B8%AD%E6%9C%80%E5%90%8E%E5%89%A9%E4%B8%8B%E7%9A%84%E6%95%B0%E5%AD%97/README.md) | | 简单 |
8585
| [63](https://leetcode-cn.com/problems/gu-piao-de-zui-da-li-run-lcof) | [股票的最大利润](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9863.%20%E8%82%A1%E7%A5%A8%E7%9A%84%E6%9C%80%E5%A4%A7%E5%88%A9%E6%B6%A6/README.md) | `动态规划` | 中等 |
8686
| [64](https://leetcode-cn.com/problems/qiu-12n-lcof) | [求 1+2+…+n](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9864.%20%E6%B1%821%2B2%2B%E2%80%A6%2Bn/README.md) | | 中等 |
8787
| [65](https://leetcode-cn.com/problems/bu-yong-jia-jian-cheng-chu-zuo-jia-fa-lcof) | [不用加减乘除做加法](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9865.%20%E4%B8%8D%E7%94%A8%E5%8A%A0%E5%87%8F%E4%B9%98%E9%99%A4%E5%81%9A%E5%8A%A0%E6%B3%95/README.md) | | 简单 |
88-
| [66](https://leetcode-cn.com/problems/gou-jian-cheng-ji-shu-zu-lcof) | [构建乘积数组](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9866.%20%E6%9E%84%E5%BB%BA%E4%B9%98%E7%A7%AF%E6%95%B0%E7%BB%84/README.md) | | 简单 |
88+
| [66](https://leetcode-cn.com/problems/gou-jian-cheng-ji-shu-zu-lcof) | [构建乘积数组](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9866.%20%E6%9E%84%E5%BB%BA%E4%B9%98%E7%A7%AF%E6%95%B0%E7%BB%84/README.md) | | 中等 |
8989
| [67](https://leetcode-cn.com/problems/ba-zi-fu-chuan-zhuan-huan-cheng-zheng-shu-lcof) | [把字符串转换成整数](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9867.%20%E6%8A%8A%E5%AD%97%E7%AC%A6%E4%B8%B2%E8%BD%AC%E6%8D%A2%E6%88%90%E6%95%B4%E6%95%B0/README.md) | `数学`,`字符串` | 中等 |
9090
| [68 - I](https://leetcode-cn.com/problems/er-cha-sou-suo-shu-de-zui-jin-gong-gong-zu-xian-lcof) | [二叉搜索树的最近公共祖先](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9868%20-%20I.%20%E4%BA%8C%E5%8F%89%E6%90%9C%E7%B4%A2%E6%A0%91%E7%9A%84%E6%9C%80%E8%BF%91%E5%85%AC%E5%85%B1%E7%A5%96%E5%85%88/README.md) | `树` | 简单 |
9191
| [68 - II](https://leetcode-cn.com/problems/er-cha-shu-de-zui-jin-gong-gong-zu-xian-lcof) | [二叉树的最近公共祖先](/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9868%20-%20II.%20%E4%BA%8C%E5%8F%89%E6%A0%91%E7%9A%84%E6%9C%80%E8%BF%91%E5%85%AC%E5%85%B1%E7%A5%96%E5%85%88/README.md) | `树` | 简单 |

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