LeetCodeAnimation/Readme.md

![LeetCode Animation All in One](https://upload-images.jianshu.io/upload_images/1940317-e837182a805cecce.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)

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[There is an English version of README here. just click it！](https://github.com/MisterBooo/LeetCodeAnimation/blob/master/README-En.md)

我会尽力将 LeetCode 上所有的题目都用动画的形式演示出来，计划用 3 到 4 年时间去完成它，期待与你见证这一天！

文章最新首发于微信公众号 **吴师兄学算法**，您可以关注获取最新的文章。

为了帮助大家更好的入门学习算法，经过半年的积累，我给大家整理了《剑指 Offer》系列的四十道题目，都是算法面试的高频题目，每一道题目我都提供详细的分析、精美的配图、易于理解的动画视频，适合那些第一次刷题的同学，当然，也适合重复刷题的老手再次学习巩固基础。

![](https://weixin-1257126549.cos.ap-guangzhou.myqcloud.com/blog/qebp5.png)


文章同步博客地址：https://blog.algomooc.com/

## 汇总

| 序号 | 题目&题解                                                    | 动画                                                         |
| ---- | ------------------------------------------------------------ | ------------------------------------------------------------ |
| 0    | [十大经典排序算法动画与解析，看我就够了！（配代码完全版）](https://mp.weixin.qq.com/s/vn3KiV-ez79FmbZ36SX9lg) |                                                              |
| 1    | [两数之和](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第1号问题：两数之和.md) | ![](https://blog-1257126549.cos.ap-guangzhou.myqcloud.com/blog/av47v.gif) |
| 2    | [两数相加](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第2号问题：两数相加.md) | ![](https://blog-1257126549.cos.ap-guangzhou.myqcloud.com/blog/fz933.gif) |
| 3    | [无重复字符的最长子串](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第3号问题：无重复字符的最长子串.md) | ![](https://blog-1257126549.cos.ap-guangzhou.myqcloud.com/blog/vxa7f.gif) |
| 4    | [寻找两个有序数组的中位数](https://mp.weixin.qq.com/s/FBlH7o-ssj_iMEPLcvsY2w) |                                                              |
| 9    | [回文数](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第9号问题：回文数.md) |                                                              |
| 10   | [正则表达式匹配](https://mp.weixin.qq.com/s/ZoytuPt5dfP5pMODbuKnCQ) |                                                              |
| 11   | [盛最多水的容器](https://mp.weixin.qq.com/s/0PCW-7JzU8rfrLA5GQmFiQ) | ![](https://blog-1257126549.cos.ap-guangzhou.myqcloud.com/blog/en8u4.gif) |
| 15   | [三数之和](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第15号问题：三数之和.md) |                                                              |
| 19   | [删除链表的倒数第 N 个节点](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第19号问题：删除链表的倒数第N个节点.md) | ![](https://blog-1257126549.cos.ap-guangzhou.myqcloud.com/blog/metqn.gif) |
| 20   | [有效的括号](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第20号问题：有效的括号.md) | ![](https://blog-1257126549.cos.ap-guangzhou.myqcloud.com/blog/ey3lr.gif) |
| 21   | [合并两个有序链表](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第21号问题：合并两个有序链表.md) |                                                              |
| 23   | [合并 K 个排序链表](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第23号问题：合并K个排序链表.md) |                                                              |
| 24   | [两两交换链表中的节点](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第24号问题：两两交换链表中的节点.md) |                                                              |
| 25   | [K 个一组翻转链表](https://mp.weixin.qq.com/s/YOz66mJchVIEQjA7TBV2cg) |                                                              |
| 26   | [删除排序数组中的重复项](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第26号问题：删除排序数组中的重复项.md) | ![](https://blog-1257126549.cos.ap-guangzhou.myqcloud.com/blog/4tk72.gif) |
| 32   | [最长有效括号](https://mp.weixin.qq.com/s/CPIDKHsg3ROT10rVFDyDJQ) |                                                              |
| 38   | [报数](https://mp.weixin.qq.com/s/DKXJR8pNX3fKGvtSn0TEjw)    |                                                              |
| 41   | [缺失的第一个正数](<https://mp.weixin.qq.com/s?__biz=MzUyNjQxNjYyMg==&mid=2247486473&idx=3&sn=06bf5f9c17cd3cb328934acc698b0ec3&chksm=fa0e6388cd79ea9e30c67dd2e5251056d860ba45e1fcbbcd4524573072305396d06629312c91&token=1735603091&lang=zh_CN#rd>) |                                                              |
| 66   | [加一](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第66号问题：加一.md) |                                                              |
| 75   | [颜色分类](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第75号问题：颜色分类.md) | ![](https://blog-1257126549.cos.ap-guangzhou.myqcloud.com/blog/ehgxu.gif) |
| 86   | [分割链表](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第86号问题：分割链表.md) |                                                              |
| 92   | [反转链表 II](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第92号问题：反转链表II.md) |                                                              |
| 94   | [二叉树的中序遍历](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第94号问题：二叉树的中序遍历.md) |                                                              |
| 101  | [对称二叉树](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第101号问题：对称二叉树.md) |                                                              |
| 102  | [二叉树的层序遍历](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第102号问题：二叉树的层序遍历.md) |                                                              |
| 103  | [二叉树的锯齿形层次遍历](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第103号问题：二叉树的锯齿形层次遍历.md) |                                                              |
| 107  | [二叉树的层次遍历 II](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第107号问题：二叉树的层次遍历II.md) |                                                              |
| 118  | [杨辉三角](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第118号问题：杨辉三角.md) |                                                              |
| 119  | [杨辉三角II](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第119号问题：杨辉三角II.md) |                                                              |
| 110  | [平衡二叉树](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第110号问题：平衡二叉树.md) |                                                              |
| 121  | [买卖股票的最佳时机](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第121号问题：买卖股票的最佳时机.md) |                                                              |
| 122  | [买卖股票的最佳时机II](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第122号问题：买卖股票的最佳时机II.md) |                                                              |
| 123  | [买卖股票的最佳时机III](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第123号问题：买卖股票的最佳时机III.md) |                                                              |
| 125  | [验证回文串](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第125号问题：验证回文串.md) |                                                              |
| 131  | [分割回文串](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第131号问题：分割回文串.md) |                                                              |
| 136  | [只出现一次的数字](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第136号问题：只出现一次的数字.md) |                                                              |
| 138  | [复制带随机指针](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第138号问题：复制带随机指针.md) |                                                              |
| 139  | [单词拆分](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第139号问题：单词拆分.md) |                                                              |
| 141  | [环形链表](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第141号问题：环形链表.md) |                                                              |
| 144  | [二叉树的前序遍历](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第144号问题：二叉树的前序遍历.md) |                                                              |
| 145  | [二叉树的后序遍历](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第145号问题：二叉树的后序遍历.md) |                                                              |
| 146  | [LRU缓存机制](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第146号问题：LRU缓存机制.md) |                                                              |
| 150  | [逆波兰表达式求值](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第150号问题：逆波兰表达式求值.md) |                                                              |
| 153  | [寻找旋转排序数组中的最小值](<https://mp.weixin.qq.com/s?__biz=MzUyNjQxNjYyMg==&mid=2247486243&idx=3&sn=ed49d65662be56ca76753141b91ce6ef&chksm=fa0e64a2cd79edb4b64d11e3af5f0ee2f597bbd843d5f34a812ef70f0f97e190d381e77f05f8&token=387372133&lang=zh_CN#rd>) |                                                              |
| 164  | [最大间距](https://mp.weixin.qq.com/s/xHxjCDdFZyCW2pnY6Cz8SQ) |                                                              |
| 167  | [两数之和 II - 输入有序数组](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第167号问题：两数之和II-输入有序数组.md) |                                                              |
| 169  | [求众数](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第169号问题：求众数.md) |                                                              |
| 172  | [阶乘后的零](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第172号问题：阶乘后的零.md) |                                                              |
| 187  | [重复的 DNA 序列](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第187号问题：重复的DNA序列.md) |                                                              |
| 191  | [位1的个数](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第191号问题：位1的个数.md) |                                                              |
| 199  | [二叉树的右视图](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第199号问题：二叉树的右视图.md) |                                                              |
| 201  | [数字范围按位与](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第201号问题：数字范围按位与.md) |                                                              |
| 203  | [移除链表元素](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第203号问题：移除链表元素.md) |                                                              |
| 206  | [反转链表](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第206号问题：反转链表.md) |                                                              |
| 209  | [长度最小的子数组](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第209号问题：长度最小的子数组.md) |                                                              |
| 219  | [存在重复元素 II](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第219号问题：存在重复元素II.md) |                                                              |
| 229  | [求众数II](https://mp.weixin.qq.com/s/ObO4eQbjp1s1g_WXPkjixQ) |                                                              |
| 231  | [2的幂](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第231号问题：2的幂.md) |                                                              |
| 232  | [使用栈实现队列](https://mp.weixin.qq.com/s/j6w94_PjvsL9Dip_xBcqcg) |                                                              |
| 237  | [删除链表中的节点](https://mp.weixin.qq.com/s/2XdUeDNblryFpXpTUgsaMQ) |                                                              |
| 239  | [滑动窗口最大值](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第239号问题：滑动窗口最大值.md) |                                                              |
| 242  | [有效的字母异位词](https://mp.weixin.qq.com/s/o5HTxmOgpftSaQdebS9zyQ) |                                                              |
| 268  | [缺失数字](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第268号问题：缺失数字.md) |                                                              |
| 279  | [完全平方数](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第279号问题：完全平方数.md) |                                                              |
| 283  | [移动零](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第283号问题：移动零.md) |                                                              |
| 295  | [数据流的中位数](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第295号问题：数据流的中位数.md) |                                                              |
| 301  | [删除无效的括号](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第301号问题：删除无效的括号.md) |                                                              |
| 319  | [灯泡开关](https://mp.weixin.qq.com/s/u35RGvT5Bc2o7jM-Uu_ZYA) |                                                              |
| 326  | [3 的幂](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第326号问题：3的幂.md) |                                                              |
| 328  | [奇偶链表](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第328号问题：奇偶链表.md) |                                                              |
| 342  | [4的幂](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第342号问题：4的幂.md) |                                                              |
| 344  | [反转字符串](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第344号问题：反转字符串.md) |                                                              |
| 347  | [前K个高频元素](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第347号问题：前K个高频元素.md) |                                                              |
| 349  | [两个数组的交集](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第349号问题：两个数组的交集.md) |                                                              |
| 350  | [两个数组的交集 II](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第350号问题：两个数组的交集II.md) |                                                              |
| 445  | [两数相加 II](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第445号问题：两数相加II.md) |                                                              |
| 447  | [回旋镖的数量](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第447号问题：回旋镖的数量.md) |                                                              |
| 454  | [四数相加 II](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第454号问题：四数相加II.md) |                                                              |
| 642  | [设计一个搜索自动完成系统](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第642号问题：设计一个搜索自动完成系统.md) |                                                              |
| 690  | [员工的重要性](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第690号问题：员工的重要性.md) |                                                              |
| 739  | [每日温度](https://mp.weixin.qq.com/s/3kDSOHyd-qOw7apzj0Z9YQ) |                                                              |
| 877  | [石子游戏](https://github.com/MisterBooo/LeetCodeAnimation/tree/master/notes/LeetCode第877号问题：石子游戏.md) |                                                              |
| 1025 | [除数博弈](https://mp.weixin.qq.com/s/0u6z02QYj1OpAwf54k8-Dw) |                                                              |
| 1099 | [小于 K 的两数之和](https://mp.weixin.qq.com/s/S6BbLeP_th_9JheNX7NN-w) |                                                              |





![](Pictures/qrcode.jpg)