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LeetCode021

★ 356 Open GitHub ↗

🚀 LeetCode From Zero To One & 题单整理 & 题解分享 & 算法模板 & 刷题路线，持续更新中...

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# LeetCode From Zero To One

该仓库是自己整理的一个题单和题解列表，题单来自 [代码随想录](https://programmercarl.com/)，推荐大家先去网站一刷，此列表主要是为了方便二刷和三刷的小伙伴们，省去在页面里回来切换页面的麻烦，同时每道题目后面附带了我在学习时记录的题解，最后整理这个仓库也花费了不少时间和精力，如果对大家有帮助不要忘记给个 **Star** 吖，谢谢！

仓库说明：

1. 题解中的代码实现语言是 C++，尽量保证每道题目使用「**最优**」的写法。对于初学的小伙伴不需要过于纠结语言的问题，重点学习优秀的算法实现思想，然后再用自己熟悉的语言进行实现。

> 关于「最优」体现以下两个方面：
   >
   > 1. 时间复杂度，在满足题目要求的基础上尽可能满足进阶时间复杂度。
   >
   > 2. 代码书写度，对于一道题目有很多种实现方式，尽量使用最简洁的一种实现方式。

2. 题解是自己学习过程中认真写的，并非搬运，主要记录题目的算法核心实现步骤。

**目前已有题单**：

1. [代码随想录](https://github.com/tonngw/LeetCode021/blob/master/%E4%BB%A3%E7%A0%81%E9%9A%8F%E6%83%B3%E5%BD%95.md)
2. [LeetCode Hot 100 顺序版](https://github.com/tonngw/LeetCode021/blob/master/LeetCode%20Hot%20100.md)
3. [LeetCode Hot 100 分类版](https://github.com/tonngw/LeetCode021/blob/master/LeetCode%20Hot%20100%20%E5%88%86%E7%B1%BB%E7%89%88.md)
4. [剑指 Offer 顺序版](https://github.com/tonngw/LeetCode021/blob/master/%E5%89%91%E6%8C%87%20Offer.md)
5. [剑指 Offer 分类版](https://github.com/tonngw/LeetCode021/blob/master/%E5%89%91%E6%8C%87%20Offer%20%E5%88%86%E7%B1%BB%E7%89%88.md)

TODO：

- [x] 代码随想录题单
- [x] LeetCode Hot 100 题单 
- [x] 为每个题单添加传送门，从算法标签到转到文档具体位置。
- [x] 剑指 Offer 题单
- [x] 排序算法总结（内部排序、外部排序）
- [ ] AcWing 算法基础课
- [ ] 牛客网面试必刷 TOP 101 题单
- [ ] CodeTop Hot 100 题单
- [ ] 算法模板整理

Tips：

- 按住 `Ctrl` 点击链接可以在新标签页打开，提升效率利器！

持续更新中... 你的 **Star** 是我更新的最大动力！

#### 传送门

- [数组](https://github.com/tonngw/LeetCode021#数组)
- [链表](https://github.com/tonngw/LeetCode021#链表)
- [哈希表](https://github.com/tonngw/LeetCode021#哈希表)
- [字符串](https://github.com/tonngw/LeetCode021#字符串)
- [双指针算法](https://github.com/tonngw/LeetCode021#双指针算法)
- [栈与队列](https://github.com/tonngw/LeetCode021#栈与队列)
- [二叉树](https://github.com/tonngw/LeetCode021#二叉树)
- [回溯](https://github.com/tonngw/LeetCode021#回溯)
- [贪心算法](https://github.com/tonngw/LeetCode021#贪心算法)
- [动态规划](https://github.com/tonngw/LeetCode021#动态规划)

## 数组

- [704. 二分查找](https://leetcode-cn.com/problems/binary-search/) 「[题解](https://leetcode-cn.com/problems/binary-search/solution/704-er-fen-cha-zhao-by-tonngw-nk9o/)」
- [35. 搜索插入位置](https://leetcode-cn.com/problems/search-insert-position/) 「[题解](https://leetcode-cn.com/problems/search-insert-position/solution/35-sou-suo-cha-ru-wei-zhi-by-tonngw-srqu/)」
- [34. 在排序数组中查找元素的第一个和最后一个位置](https://leetcode-cn.com/problems/find-first-and-last-position-of-element-in-sorted-array/) 「[题解](https://leetcode-cn.com/problems/find-first-and-last-position-of-element-in-sorted-array/solution/34-zai-pai-xu-shu-zu-zhong-cha-zhao-yuan-mm3f/)」
- [69. x 的平方根](https://leetcode-cn.com/problems/sqrtx/) 「[题解](https://leetcode-cn.com/problems/sqrtx/solution/69-x-de-ping-fang-gen-by-tonngw-p82h/)」
- [367. 有效的完全平方数](https://leetcode-cn.com/problems/valid-perfect-square/) 「[题解](https://leetcode-cn.com/problems/valid-perfect-square/solution/367-you-xiao-de-wan-quan-ping-fang-shu-b-bs6i/)」
- [27. 移除元素](https://leetcode-cn.com/problems/remove-element/) 「[题解](https://leetcode-cn.com/problems/remove-element/solution/27-yi-chu-yuan-su-by-tonngw-6xwn/)」
- [26. 删除有序数组中的重复项](https://leetcode-cn.com/problems/remove-duplicates-from-sorted-array/) 「[题解](https://leetcode-cn.com/problems/remove-duplicates-from-sorted-array/solution/26-shan-chu-you-xu-shu-zu-zhong-de-zhong-n4n7/)」
- [283. 移动零](https://leetcode-cn.com/problems/move-zeroes/) 「[题解](https://leetcode-cn.com/problems/move-zeroes/solution/283-yi-dong-ling-by-tonngw-x0zd/)」
- [844. 比较含退格的字符串](https://leetcode-cn.com/problems/backspace-string-compare/) 「[题解](https://leetcode-cn.com/problems/backspace-string-compare/solution/844-bi-jiao-han-tui-ge-de-zi-fu-chuan-by-rw53/)」
- [977. 有序数组的平方](https://leetcode-cn.com/problems/squares-of-a-sorted-array/) 「[题解](https://leetcode-cn.com/problems/squares-of-a-sorted-array/solution/977-you-xu-shu-zu-de-ping-fang-by-tonngw-r0ba/)」
- [209. 长度最小的子数组](https://leetcode-cn.com/problems/minimum-size-subarray-sum/) 「[题解](https://leetcode-cn.com/problems/minimum-size-subarray-sum/solution/209-chang-du-zui-xiao-de-zi-shu-zu-by-to-3ryl/)」
- [904. 水果成篮](https://leetcode-cn.com/problems/fruit-into-baskets/) 「[题解](https://leetcode-cn.com/problems/fruit-into-baskets/solution/904-shui-guo-cheng-lan-by-tonngw-yr8e/)」
- [76. 最小覆盖子串](https://leetcode.cn/problems/minimum-window-substring/)「[题解](https://leetcode.cn/problems/minimum-window-substring/solution/hua-dong-chuang-kou-suan-fa-76-zui-xiao-3y39p/)」
- [54. 螺旋矩阵](https://leetcode-cn.com/problems/spiral-matrix/) 「[题解](https://leetcode-cn.com/problems/spiral-matrix/solution/54-luo-xuan-ju-zhen-by-tonngw-q2a2/)」
- [59. 螺旋矩阵 II](https://leetcode-cn.com/problems/spiral-matrix-ii/) 「[题解](https://leetcode-cn.com/problems/spiral-matrix-ii/solution/59-luo-xuan-ju-zhen-ii-by-tonngw-2cwa/)」

## 链表

- [203. 移除链表元素](https://leetcode-cn.com/problems/remove-linked-list-elements/) 「[题解](https://leetcode-cn.com/problems/remove-linked-list-elements/solution/203-yi-chu-lian-biao-yuan-su-by-tonngw-q6xj/)」
- [707. 设计链表](https://leetcode-cn.com/problems/design-linked-list/) 「[题解](https://leetcode-cn.com/problems/design-linked-list/solution/707-she-ji-lian-biao-by-tonngw-1wq4/)」
- [206. 反转链表](https://leetcode-cn.com/problems/reverse-linked-list/) 「[题解](https://leetcode-cn.com/problems/reverse-linked-list/solution/206-fan-zhuan-lian-biao-by-tonngw-brl7/)」
- [24. 两两交换链表中的节点](https://leetcode-cn.com/problems/swap-nodes-in-pairs/) 「[题解](https://leetcode-cn.com/problems/swap-nodes-in-pairs/solution/24-liang-liang-jiao-huan-lian-biao-zhong-toyu/)」
- [19. 删除链表的倒数第 N 个结点](https://leetcode-cn.com/problems/remove-nth-node-from-end-of-list/) 「[题解](https://leetcode-cn.com/problems/remove-nth-node-from-end-of-list/solution/19-shan-chu-lian-biao-de-dao-shu-di-n-ge-c2s0/)」
- [面试题 02.07. 链表相交](https://leetcode-cn.com/problems/intersection-of-two-linked-lists-lcci/) 「[题解](https://leetcode-cn.com/problems/intersection-of-two-linked-lists-lcci/solution/si-lu-qing-xi-dai-ma-jian-ji-de-xie-fa-m-1pjx/)」
- [142. 环形链表 II](https://leetcode-cn.com/problems/linked-list-cycle-ii/) 「[题解](https://leetcode-cn.com/problems/linked-list-cycle-ii/solution/142-huan-xing-lian-biao-ii-by-tonngw-uem5/)」
- [141. 环形链表](https://leetcode-cn.com/problems/linked-list-cycle/) 「[题解](https://leetcode-cn.com/problems/linked-list-cycle/solution/141-huan-xing-lian-biao-by-tonngw-2gsc/)」

## 哈希表

- [242. 有效的字母异位词](https://leetcode-cn.com/problems/valid-anagram/) 「[题解](https://leetcode-cn.com/problems/valid-anagram/solution/242-you-xiao-de-zi-mu-yi-wei-ci-by-tonng-hlcb/)」
- [383. 赎金信](https://leetcode-cn.com/problems/ransom-note/) 「[题解](https://leetcode-cn.com/problems/ransom-note/solution/383-shu-jin-xin-by-tonngw-my3k/)」
- [49. 字母异位词分组](https://leetcode.cn/problems/group-anagrams/)「[题解](https://leetcode.cn/problems/group-anagrams/solution/by-tonngw-bqjz/)」
- [438. 找到字符串中所有字母异位词](https://leetcode-cn.com/problems/find-all-anagrams-in-a-string/) 「[题解](https://leetcode-cn.com/problems/find-all-anagrams-in-a-string/solution/438-zhao-dao-zi-fu-chuan-zhong-suo-you-z-q79l/)」
- [349. 两个数组的交集](https://leetcode-cn.com/problems/intersection-of-two-arrays/) 「[题解](https://leetcode-cn.com/problems/intersection-of-two-arrays/solution/349-liang-ge-shu-zu-de-jiao-ji-by-tonngw-vuse/)」
- [350. 两个数组的交集 II](https://leetcode-cn.com/problems/intersection-of-two-arrays-ii/) 「[题解](https://leetcode-cn.com/problems/intersection-of-two-arrays-ii/solution/350-liang-ge-shu-zu-de-jiao-ji-ii-by-ton-dwfj/)」
- [202. 快乐数](https://leetcode-cn.com/problems/happy-number/) 「[题解](https://leetcode-cn.com/problems/happy-number/solution/kuai-man-zhi-zhen-ha-xi-biao-shuang-jie-0f1tq/)」
- [1. 两数之和](https://leetcode-cn.com/problems/two-sum/) 「[题解](https://leetcode-cn.com/problems/two-sum/solution/1-liang-shu-zhi-he-by-tonngw-j0do/)」
- [454. 四数相加 II](https://leetcode-cn.com/problems/4sum-ii/) 「[题解](https://leetcode-cn.com/problems/4sum-ii/solution/454-si-shu-xiang-jia-ii-by-tonngw-zofb/)」
- [15. 三数之和](https://leetcode-cn.com/problems/3sum/) 「[题解](https://leetcode-cn.com/problems/3sum/solution/15-san-shu-zhi-he-by-tonngw-cs4b/)」
- [18. 四数之和](https://leetcode-cn.com/problems/4sum/) 「[题解](https://leetcode-cn.com/problems/4sum/solution/18-si-shu-zhi-he-by-tonngw-fvqc/)」

## 字符串

- [344. 反转字符串](https://leetcode-cn.com/problems/reverse-string/) 「[题解](https://leetcode-cn.com/problems/reverse-string/solution/344-fan-zhuan-zi-fu-chuan-by-tonngw-y122/)」
- [541. 反转字符串 II](https://leetcode-cn.com/problems/reverse-string-ii/) 「[题解](https://leetcode-cn.com/problems/reverse-string-ii/solution/541-fan-zhuan-zi-fu-chuan-ii-by-tonngw-8iyn/)」
- [剑指 Offer 05. 替换空格](https://leetcode-cn.com/problems/ti-huan-kong-ge-lcof/) 「[题解](https://leetcode-cn.com/problems/ti-huan-kong-ge-lcof/solution/jian-zhi-offer-05-ti-huan-kong-ge-by-ton-wne9/)」
- [151. 翻转字符串里的单词](https://leetcode-cn.com/problems/reverse-words-in-a-string/) 「[题解](https://leetcode-cn.com/problems/reverse-words-in-a-string/solution/151-fan-zhuan-zi-fu-chuan-li-de-dan-ci-b-ifvu/)」
- [剑指 Offer 58 - II. 左旋转字符串](https://leetcode-cn.com/problems/zuo-xuan-zhuan-zi-fu-chuan-lcof/) 「[题解](https://leetcode-cn.com/problems/zuo-xuan-zhuan-zi-fu-chuan-lcof/solution/jian-zhi-offer-58-ii-zuo-xuan-zhuan-zi-f-pyjg/)」
- [28. 实现 strStr()](https://leetcode-cn.com/problems/implement-strstr/) 「[题解](https://leetcode-cn.com/problems/implement-strstr/solution/28-shi-xian-strstr-by-tonngw-i190/)」
- [459. 重复的子字符串](https://leetcode-cn.com/problems/repeated-substring-pattern/) 「[题解](https://leetcode-cn.com/problems/repeated-substring-pattern/solution/459-zhong-fu-de-zi-zi-fu-chuan-by-tonngw-durz/)」

## 双指针算法

- [27. 移除元素](https://leetcode-cn.com/problems/remove-element/) 「[题解](https://leetcode-cn.com/problems/remove-element/solution/27-yi-chu-yuan-su-by-tonngw-6xwn/)」
- [26. 删除有序数组中的重复项](https://leetcode-cn.com/problems/remove-duplicates-from-sorted-array/) 「[题解](https://leetcode-cn.com/problems/remove-duplicates-from-sorted-array/solution/26-shan-chu-you-xu-shu-zu-zhong-de-zhong-n4n7/)」
- [283. 移动零](https://leetcode-cn.com/problems/move-zeroes/) 「[题解](https://leetcode-cn.com/problems/move-zeroes/solution/283-yi-dong-ling-by-tonngw-x0zd/)」
- [844. 比较含退格的字符串](https://leetcode-cn.com/problems/backspace-string-compare/) 「[题解](https://leetcode-cn.com/problems/backspace-string-compare/solution/844-bi-jiao-han-tui-ge-de-zi-fu-chuan-by-rw53/)」
- [977. 有序数组的平方](https://leetcode-cn.com/problems/squares-of-a-sorted-array/) 「[题解](https://leetcode-cn.com/problems/squares-of-a-sorted-array/solution/977-you-xu-shu-zu-de-ping-fang-by-tonngw-r0ba/)」
- [344. 反转字符串](https://leetcode-cn.com/problems/reverse-string/) 「[题解](https://leetcode-cn.com/problems/reverse-string/solution/344-fan-zhuan-zi-fu-chuan-by-tonngw-y122/)」
- [剑指 Offer 05. 替换空格](https://leetcode-cn.com/problems/ti-huan-kong-ge-lcof/) 「[题解](https://leetcode-cn.com/problems/ti-huan-kong-ge-lcof/solution/jian-zhi-offer-05-ti-huan-kong-ge-by-ton-wne9/)」
- [151. 翻转字符串里的单词](https://leetcode-cn.com/problems/reverse-words-in-a-string/) 「[题解](https://leetcode-cn.com/problems/reverse-words-in-a-string/solution/151-fan-zhuan-zi-fu-chuan-li-de-dan-ci-b-ifvu/)」
- [206. 反转链表](https://leetcode-cn.com/problems/reverse-linked-list/) 「[题解](https://leetcode-cn.com/problems/reverse-linked-list/solution/206-fan-zhuan-lian-biao-by-tonngw-brl7/)」
- [19. 删除链表的倒数第 N 个结点](https://leetcode-cn.com/problems/remove-nth-node-from-end-of-list/) 「[题解](https://leetcode-cn.com/problems/remove-nth-node-from-end-of-list/solution/19-shan-chu-lian-biao-de-dao-shu-di-n-ge-c2s0/)」
- [面试题 02.07. 链表相交](https://leetcode-cn.com/problems/intersection-of-two-linked-lists-lcci/) 「[题解](https://leetcode-cn.com/problems/intersection-of-two-linked-lists-lcci/solution/si-lu-qing-xi-dai-ma-jian-ji-de-xie-fa-m-1pjx/)」
- [142. 环形链表 II](https://leetcode-cn.com/problems/linked-list-cycle-ii/) 「[题解](https://leetcode-cn.com/problems/linked-list-cycle-ii/solution/142-huan-xing-lian-biao-ii-by-tonngw-uem5/)」
- [141. 环形链表](https://leetcode-cn.com/problems/linked-list-cycle/) 「[题解](https://leetcode-cn.com/problems/linked-list-cycle/solution/141-huan-xing-lian-biao-by-tonngw-2gsc/)」
- [15. 三数之和](https://leetcode-cn.com/problems/3sum/) 「[题解](https://leetcode-cn.com/problems/3sum/solution/15-san-shu-zhi-he-by-tonngw-cs4b/)」
- [18. 四数之和](https://leetcode-cn.com/problems/4sum/) 「[题解](https://leetcode-cn.com/problems/4sum/solution/18-si-shu-zhi-he-by-tonngw-fvqc/)」

## 栈与队列

- [232. 用栈实现队列](https://leetcode-cn.com/problems/implement-queue-using-stacks/) 「[题解](https://leetcode-cn.com/problems/implement-queue-using-stacks/solution/232-yong-zhan-shi-xian-dui-lie-by-tonngw-4iv3/)」
- [225. 用队列实现栈](https://leetcode-cn.com/problems/implement-stack-using-queues/) 「[题解](https://leetcode-cn.com/problems/implement-stack-using-queues/solution/225-yong-dui-lie-shi-xian-zhan-by-tonngw-6be1/)」
- [20. 有效的括号](https://leetcode-cn.com/problems/valid-parentheses/) 「[题解](https://leetcode-cn.com/problems/valid-parentheses/solution/si-lu-qing-xi-dai-ma-jian-ji-de-xie-fa-2-e83j/)」
- [1047. 删除字符串中的所有相邻重复项](https://leetcode-cn.com/problems/remove-all-adjacent-duplicates-in-string/) 「[题解](https://leetcode-cn.com/problems/remove-all-adjacent-duplicates-in-string/solution/1047-shan-chu-zi-fu-chuan-zhong-de-suo-y-5ehq/)」
- [150. 逆波兰表达式求值](https://leetcode-cn.com/problems/evaluate-reverse-polish-notation/) 「[题解](https://leetcode-cn.com/problems/evaluate-reverse-polish-notation/solution/150-ni-bo-lan-biao-da-shi-qiu-zhi-by-ton-586i/)」
- [239. 滑动窗口最大值](https://leetcode-cn.com/problems/sliding-window-maximum/) 「[题解](https://leetcode-cn.com/problems/sliding-window-maximum/solution/239-hua-dong-chuang-kou-zui-da-zhi-by-to-aac7/)」
- [347. 前 K 个高频元素](https://leetcode-cn.com/problems/top-k-frequent-elements/) 「[题解](https://leetcode-cn.com/problems/top-k-frequent-elements/solution/347-qian-k-ge-gao-pin-yuan-su-by-tonngw-a12g/)」

## 二叉树

### 遍历二叉树

- [144. 二叉树的前序遍历](https://leetcode-cn.com/problems/binary-tree-preorder-traversal/)「[题解](https://leetcode-cn.com/problems/binary-tree-preorder-traversal/solution/144-er-cha-shu-de-qian-xu-bian-li-by-ton-z9xb/)」
- [589. N 叉树的前序遍历](https://leetcode-cn.com/problems/n-ary-tree-preorder-traversal/)「[题解](https://leetcode-cn.com/problems/n-ary-tree-preorder-traversal/solution/589-n-cha-shu-de-qian-xu-bian-li-by-tonn-pgfi/)」
- [145. 二叉树的后序遍历](https://leetcode-cn.com/problems/binary-tree-postorder-traversal/)「[题解](https://leetcode-cn.com/problems/binary-tree-postorder-traversal/solution/145-er-cha-shu-de-hou-xu-bian-li-by-tonn-ngrt/)」
- [590. N 叉树的后序遍历](https://leetcode-cn.com/problems/n-ary-tree-postorder-traversal/)「[题解](https://leetcode-cn.com/problems/n-ary-tree-postorder-traversal/solution/590-n-cha-shu-de-hou-xu-bian-li-by-tonng-ipjo/)」
- [94. 二叉树的中序遍历](https://leetcode-cn.com/problems/binary-tree-inorder-traversal/)「[题解](https://leetcode-cn.com/problems/binary-tree-inorder-traversal/solution/94-er-cha-shu-de-zhong-xu-bian-li-by-ton-6i82/)」
- [102. 二叉树的层序遍历](https://leetcode-cn.com/problems/binary-tree-level-order-traversal/)「[题解](https://leetcode-cn.com/problems/binary-tree-level-order-traversal/solution/102-er-cha-shu-de-ceng-xu-bian-li-by-ton-zt9s/)」
- [107. 二叉树的层序遍历 II](https://leetcode-cn.com/problems/binary-tree-level-order-traversal-ii/)「[题解](https://leetcode-cn.com/problems/binary-tree-level-order-traversal-ii/solution/107-er-cha-shu-de-ceng-xu-bian-li-ii-by-ea0gn/)」
- [429. N 叉树的层序遍历](https://leetcode-cn.com/problems/n-ary-tree-level-order-traversal/)「[题解](https://leetcode-cn.com/problems/n-ary-tree-level-order-traversal/solution/429-n-cha-shu-de-ceng-xu-bian-li-by-tonn-2biu/)」
- [199. 二叉树的右视图](https://leetcode-cn.com/problems/binary-tree-right-side-view/)「[题解](https://leetcode-cn.com/problems/binary-tree-right-side-view/solution/199-er-cha-shu-de-you-shi-tu-by-tonngw-n6r4/)」
- [637. 二叉树的层平均值](https://leetcode-cn.com/problems/average-of-levels-in-binary-tree/)「[题解](https://leetcode-cn.com/problems/average-of-levels-in-binary-tree/solution/637-er-cha-shu-de-ceng-ping-jun-zhi-by-t-scuj/)」
- [515. 在每个树行中找最大值](https://leetcode-cn.com/problems/find-largest-value-in-each-tree-row/)「[题解](https://leetcode-cn.com/problems/find-largest-value-in-each-tree-row/solution/515-zai-mei-ge-shu-xing-zhong-zhao-zui-d-1ij2/)」
- [116. 填充每个节点的下一个右侧节点指针](https://leetcode-cn.com/problems/populating-next-right-pointers-in-each-node/)「[题解](https://leetcode-cn.com/problems/populating-next-right-pointers-in-each-node/solution/116-tian-chong-mei-ge-jie-dian-de-xia-yi-968q/)」
- [117. 填充每个节点的下一个右侧节点指针 II](https://leetcode-cn.com/problems/populating-next-right-pointers-in-each-node-ii/)「[题解](https://leetcode-cn.com/problems/populating-next-right-pointers-in-each-node-ii/solution/117-tian-chong-mei-ge-jie-dian-de-xia-yi-j1ap/)」

### 求二叉树的属性

- [104. 二叉树的最大深度](https://leetcode-cn.com/problems/maximum-depth-of-binary-tree/)「[题解](https://leetcode-cn.com/problems/maximum-depth-of-binary-tree/solution/104-er-cha-shu-de-zui-da-shen-du-by-tonn-zen4/)」
- [559. N 叉树的最大深度](https://leetcode-cn.com/problems/maximum-depth-of-n-ary-tree/)「[题解](https://leetcode-cn.com/problems/maximum-depth-of-n-ary-tree/solution/559-n-cha-shu-de-zui-da-shen-du-by-tonng-5mpk/)」
- [111. 二叉树的最小深度](https://leetcode-cn.com/problems/minimum-depth-of-binary-tree/)「[题解](https://leetcode-cn.com/problems/minimum-depth-of-binary-tree/solution/111-er-cha-shu-de-zui-xiao-shen-du-by-to-o3dn/)」
- [226. 翻转二叉树](https://leetcode-cn.com/problems/invert-binary-tree/)「[题解](https://leetcode-cn.com/problems/invert-binary-tree/solution/226-fan-zhuan-er-cha-shu-by-tonngw-8v8z/)」
- [101. 对称二叉树](https://leetcode-cn.com/problems/symmetric-tree/)「[题解](https://leetcode-cn.com/problems/symmetric-tree/solution/101-dui-cheng-er-cha-shu-by-tonngw-zoj1/)」
- [100. 相同的树](https://leetcode-cn.com/problems/same-tree/)「[题解](https://leetcode-cn.com/problems/same-tree/solution/100-xiang-tong-de-shu-by-tonngw-d2nv/)」
- [572. 另一棵树的子树](https://leetcode-cn.com/problems/subtree-of-another-tree/)「[题解](https://leetcode-cn.com/problems/subtree-of-another-tree/solution/572-ling-yi-ke-shu-de-zi-shu-by-tonngw-dn3q/)」
- [222. 完全二叉树的节点个数](https://leetcode-cn.com/problems/count-complete-tree-nodes/)「[题解](https://leetcode-cn.com/problems/count-complete-tree-nodes/solution/222-wan-quan-er-cha-shu-de-jie-dian-ge-s-e4d9/)」
- [110. 平衡二叉树](https://leetcode-cn.com/problems/balanced-binary-tree/)「[题解](https://leetcode-cn.com/problems/balanced-binary-tree/solution/110-ping-heng-er-cha-shu-by-tonngw-gkhd/)」
- [257. 二叉树的所有路径](https://leetcode-cn.com/problems/binary-tree-paths/)「[题解](https://leetcode-cn.com/problems/binary-tree-paths/solution/257-er-cha-shu-de-suo-you-lu-jing-by-ton-czh8/)」
- [404. 左叶子之和](https://leetcode-cn.com/problems/sum-of-left-leaves/)「[题解](https://leetcode-cn.com/problems/sum-of-left-leaves/solution/404-zuo-xie-zi-zhi-he-by-tonngw-r38j/)」
- [513. 找树左下角的值](https://leetcode-cn.com/problems/find-bottom-left-tree-value/)「[题解](https://leetcode-cn.com/problems/find-bottom-left-tree-value/solution/513-zhao-shu-zuo-xia-jiao-de-zhi-by-tonn-94nr/)」
- [112. 路径总和](https://leetcode-cn.com/problems/path-sum/)「[题解](https://leetcode-cn.com/problems/path-sum/solution/112-lu-jing-zong-he-by-tonngw-b1bq/)」

### 二叉树的修改与构造

- [105. 从前序与中序遍历序列构造二叉树](https://leetcode-cn.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal/)「[题解](https://leetcode-cn.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal/solution/105-cong-qian-xu-yu-zhong-xu-bian-li-xu-wgoxg/)」
- [106. 从中序与后序遍历序列构造二叉树](https://leetcode-cn.com/problems/construct-binary-tree-from-inorder-and-postorder-traversal/)「[题解](https://leetcode-cn.com/problems/construct-binary-tree-from-inorder-and-postorder-traversal/solution/106-cong-zhong-xu-yu-hou-xu-bian-li-xu-l-790b/)」
- [654. 最大二叉树](https://leetcode-cn.com/problems/maximum-binary-tree/)「[题解](https://leetcode-cn.com/problems/maximum-binary-tree/solution/654-zui-da-er-cha-shu-by-tonngw-vnyk/)」
- [617. 合并二叉树](https://leetcode-cn.com/problems/merge-two-binary-trees/)「[题解](https://leetcode-cn.com/problems/merge-two-binary-trees/solution/617-he-bing-er-cha-shu-by-tonngw-aizw/)」

### 求二叉搜索树的属性

- [700. 二叉搜索树中的搜索](https://leetcode-cn.com/problems/search-in-a-binary-search-tree/)「[题解](https://leetcode-cn.com/problems/search-in-a-binary-search-tree/solution/700-er-cha-sou-suo-shu-zhong-de-sou-suo-c4qo8/)」
- [98. 验证二叉搜索树](https://leetcode-cn.com/problems/validate-binary-search-tree/)「[题解](https://leetcode-cn.com/problems/validate-binary-search-tree/solution/98-yan-zheng-er-cha-sou-suo-shu-by-tonng-nsg4/)」
- [530. 二叉搜索树的最小绝对差](https://leetcode-cn.com/problems/minimum-absolute-difference-in-bst/)「[题解](https://leetcode-cn.com/problems/minimum-absolute-difference-in-bst/solution/530-er-cha-sou-suo-shu-de-zui-xiao-jue-d-hnpi/)」
- [501. 二叉搜索树中的众数](https://leetcode-cn.com/problems/find-mode-in-binary-search-tree/)「[题解](https://leetcode-cn.com/problems/find-mode-in-binary-search-tree/solution/501-er-cha-sou-suo-shu-zhong-de-zhong-sh-wmcf/)」
- [538. 把二叉搜索树转换为累加树](https://leetcode-cn.com/problems/convert-bst-to-greater-tree/)「[题解](https://leetcode-cn.com/problems/convert-bst-to-greater-tree/solution/538-ba-er-cha-sou-suo-shu-zhuan-huan-wei-kse8/)」

### 二叉树公共祖先问题

- [236. 二叉树的最近公共祖先](https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-tree/)「[题解](https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-tree/solution/236-er-cha-shu-de-zui-jin-gong-gong-zu-x-ok6d/)」
- [235. 二叉搜索树的最近公共祖先](https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-search-tree/)「[题解](https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-search-tree/solution/235-er-cha-sou-suo-shu-de-zui-jin-gong-g-xjo0/)」

### 二叉搜索树的修改与构造

- [701. 二叉搜索树中的插入操作](https://leetcode-cn.com/problems/insert-into-a-binary-search-tree/)「[题解](https://leetcode-cn.com/problems/insert-into-a-binary-search-tree/solution/701-er-cha-sou-suo-shu-zhong-de-cha-ru-c-9zqv/)」
- [450. 删除二叉搜索树中的节点](https://leetcode-cn.com/problems/delete-node-in-a-bst/)「[题解](https://leetcode-cn.com/problems/delete-node-in-a-bst/solution/450-shan-chu-er-cha-sou-suo-shu-zhong-de-ldqw/)」
- [669. 修剪二叉搜索树](https://leetcode-cn.com/problems/trim-a-binary-search-tree/)「[题解](https://leetcode-cn.com/problems/trim-a-binary-search-tree/solution/669-xiu-jian-er-cha-sou-suo-shu-by-tonng-a943/)」
- [108. 将有序数组转换为二叉搜索树](https://leetcode-cn.com/problems/convert-sorted-array-to-binary-search-tree/)「[题解](https://leetcode-cn.com/problems/convert-sorted-array-to-binary-search-tree/solution/108-jiang-you-xu-shu-zu-zhuan-huan-wei-e-ogu2/)」

## 回溯

### 组合问题

- [77. 组合](https://leetcode-cn.com/problems/combinations/)「[题解](https://leetcode-cn.com/problems/combinations/solution/77-zu-he-by-tonngw-torm/)」
- [216. 组合总和 III](https://leetcode-cn.com/problems/combination-sum-iii/)「[题解](https://leetcode-cn.com/problems/combination-sum-iii/solution/216-zu-he-zong-he-iii-by-tonngw-mf64/)」
- [17. 电话号码的字母组合](https://leetcode-cn.com/problems/letter-combinations-of-a-phone-number/)「[题解](https://leetcode-cn.com/problems/letter-combinations-of-a-phone-number/solution/17-dian-hua-hao-ma-de-zi-mu-zu-he-by-ton-fwvm/)」
- [39. 组合总和](https://leetcode-cn.com/problems/combination-sum/)「[题解](https://leetcode-cn.com/problems/combination-sum/solution/39-zu-he-zong-he-by-tonngw-oqyt/)」
- [40. 组合总和 II](https://leetcode-cn.com/problems/combination-sum-ii/)「[题解](https://leetcode-cn.com/problems/combination-sum-ii/solution/40-zu-he-zong-he-ii-by-tonngw-wesr/)」

### 分割问题

- [131. 分割回文串](https://leetcode-cn.com/problems/palindrome-partitioning/)「[题解](https://leetcode-cn.com/problems/palindrome-partitioning/solution/131-fen-ge-hui-wen-chuan-by-tonngw-yfro/)」
- [93. 复原 IP 地址](https://leetcode-cn.com/problems/restore-ip-addresses/)「[题解](https://leetcode-cn.com/problems/restore-ip-addresses/solution/93-fu-yuan-ip-di-zhi-by-tonngw-61ni/)」

### 子集问题

- [78. 子集](https://leetcode-cn.com/problems/subsets/)「[题解](https://leetcode-cn.com/problems/subsets/solution/78-zi-ji-by-tonngw-bhjq/)」
- [90. 子集 II](https://leetcode-cn.com/problems/subsets-ii/)「[题解](https://leetcode-cn.com/problems/subsets-ii/solution/90-zi-ji-ii-by-tonngw-j0e3/)」
- [491. 递增子序列](https://leetcode-cn.com/problems/increasing-subsequences/)「[题解](https://leetcode-cn.com/problems/increasing-subsequences/solution/491-di-zeng-zi-xu-lie-by-tonngw-s1rh/)」

### 排列问题

- [46. 全排列](https://leetcode-cn.com/problems/permutations/)「[题解](https://leetcode-cn.com/problems/permutations/solution/46-quan-pai-lie-by-tonngw-08i3/)」
- [47. 全排列 II](https://leetcode-cn.com/problems/permutations-ii/)「[题解](https://leetcode-cn.com/problems/permutations-ii/solution/47-quan-pai-lie-ii-by-tonngw-in1s/)」

### 棋盘问题

- [51. N 皇后](https://leetcode-cn.com/problems/n-queens/)「[题解](https://leetcode-cn.com/problems/n-queens/solution/51-n-huang-hou-by-tonngw-rl3n/)」
- [52. N皇后 II](https://leetcode-cn.com/problems/n-queens-ii/)「[题解](https://leetcode-cn.com/problems/n-queens-ii/solution/52-nhuang-hou-ii-by-tonngw-y2b8/)」
- [37. 解数独](https://leetcode-cn.com/problems/sudoku-solver/)「[题解](https://leetcode-cn.com/problems/sudoku-solver/solution/37-jie-shu-du-by-tonngw-5zqf/)」

### 其他

- [332. 重新安排行程](https://leetcode-cn.com/problems/reconstruct-itinerary/)「[题解](https://leetcode-cn.com/problems/reconstruct-itinerary/solution/332-zhong-xin-an-pai-xing-cheng-by-tonng-fody/)」

## 贪心算法

### 简单贪心

- [455. 分发饼干](https://leetcode-cn.com/problems/assign-cookies/)「[题解](https://leetcode-cn.com/problems/assign-cookies/solution/455-fen-fa-bing-gan-by-tonngw-4nmz/)」
- [53. 最大子序和](https://leetcode-cn.com/problems/maximum-subarray/)「[题解](https://leetcode-cn.com/problems/maximum-subarray/solution/53-zui-da-zi-xu-he-by-tonngw-9jx5/)」
- [1005. K 次取反后最大化的数组和](https://leetcode-cn.com/problems/maximize-sum-of-array-after-k-negations/)「[题解](https://leetcode-cn.com/problems/maximize-sum-of-array-after-k-negations/solution/1005-k-ci-qu-fan-hou-zui-da-hua-de-shu-z-y87w/)」
- [860. 柠檬水找零](https://leetcode-cn.com/problems/lemonade-change/)「[题解](https://leetcode-cn.com/problems/lemonade-change/solution/mo-ni-tan-xin-860-ning-meng-shui-zhao-li-mf63/)」

### 中等贪心

- [376. 摆动序列](https://leetcode-cn.com/problems/wiggle-subsequence/)「[题解](https://leetcode-cn.com/problems/wiggle-subsequence/solution/tan-xin-suan-fa-fu-zheng-ming-376-bai-do-3ga9/)」
- [738. 单调递增的数字](https://leetcode-cn.com/problems/monotone-increasing-digits/)「[题解](https://leetcode-cn.com/problems/monotone-increasing-digits/solution/tan-xin-miao-dong-738-dan-diao-di-zeng-d-89m9/)」

### 股票问题

- [122. 买卖股票的最佳时机 II](https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-ii/)「[题解](https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-ii/solution/si-lu-qing-xi-dai-ma-jian-ji-de-ti-jie-1-xlap/)」
- [714. 买卖股票的最佳时机含手续费](https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-with-transaction-fee/)「[题解](https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-with-transaction-fee/solution/714-mai-mai-gu-piao-de-zui-jia-shi-ji-ha-qen5/)」

### 两个维护度权衡问题

- [135. 分发糖果](https://leetcode-cn.com/problems/candy/)「[题解](https://leetcode-cn.com/problems/candy/solution/135-fen-fa-tang-guo-by-tonngw-f5pq/)」
- [406. 根据身高重建队列](https://leetcode-cn.com/problems/queue-reconstruction-by-height/)「[题解](https://leetcode-cn.com/problems/queue-reconstruction-by-height/solution/406-gen-ju-shen-gao-zhong-jian-dui-lie-b-08mz/)」

### 区间问题

- [55. 跳跃游戏](https://leetcode-cn.com/problems/jump-game/)「[题解](https://leetcode-cn.com/problems/jump-game/solution/55-tiao-yue-you-xi-by-tonngw-ec5n/)」
- [45. 跳跃游戏 II](https://leetcode-cn.com/problems/jump-game-ii/)「[题解](https://leetcode-cn.com/problems/jump-game-ii/solution/45-tiao-yue-you-xi-ii-by-tonngw-ih55/)」
- [452. 用最少数量的箭引爆气球](https://leetcode-cn.com/problems/minimum-number-of-arrows-to-burst-balloons/)「[题解](https://leetcode-cn.com/problems/minimum-number-of-arrows-to-burst-balloons/solution/452-yong-zui-shao-shu-liang-de-jian-yin-ou0nn/)」
- [435. 无重叠区间](https://leetcode-cn.com/problems/non-overlapping-intervals/)「[题解](https://leetcode-cn.com/problems/non-overlapping-intervals/solution/435-wu-zhong-die-qu-jian-by-tonngw-2q04/)」
- [763. 划分字母区间](https://leetcode-cn.com/problems/partition-labels/)「[题解](https://leetcode-cn.com/problems/partition-labels/solution/763-hua-fen-zi-mu-qu-jian-by-tonngw-rt1i/)」
- [56. 合并区间](https://leetcode-cn.com/problems/merge-intervals/)「[题解](https://leetcode-cn.com/problems/merge-intervals/solution/tong-su-yi-dong-xiang-jie-tan-xin-jing-d-ielv/)」

### 其他

- [134. 加油站](https://leetcode-cn.com/problems/gas-station/)「[题解](https://leetcode-cn.com/problems/gas-station/solution/134-jia-you-zhan-by-tonngw-28hj/)」
- [968. 监控二叉树](https://leetcode.cn/problems/binary-tree-cameras/)「[题解](https://leetcode.cn/problems/binary-tree-cameras/solution/)」「TODO」

## 动态规划

### 动态规划基础

- [509. 斐波那契数](https://leetcode-cn.com/problems/fibonacci-number/) 「[题解](https://leetcode-cn.com/problems/fibonacci-number/solution/509-fei-bo-na-qi-shu-by-tonngw-56bq/)」
- [70. 爬楼梯](https://leetcode-cn.com/problems/climbing-stairs/) 「[题解](https://leetcode-cn.com/problems/climbing-stairs/solution/70-pa-lou-ti-wan-quan-bei-bao-fei-bo-na-p7wwt/)」
- [746. 使用最小花费爬楼梯](https://leetcode-cn.com/problems/min-cost-climbing-stairs/) 「[题解](https://leetcode-cn.com/problems/min-cost-climbing-stairs/solution/746-shi-yong-zui-xiao-hua-fei-pa-lou-ti-mf1mi/)」
- [62. 不同路径](https://leetcode-cn.com/problems/unique-paths/)「[题解](https://leetcode-cn.com/problems/unique-paths/solution/62-bu-tong-lu-jing-by-tonngw-fczx/)」
- [63. 不同路径 II](https://leetcode-cn.com/problems/unique-paths-ii/)「[题解](https://leetcode-cn.com/problems/unique-paths-ii/solution/63-bu-tong-lu-jing-ii-by-tonngw-tc06/)」
- [343. 整数拆分](https://leetcode-cn.com/problems/integer-break/)「[题解](https://leetcode-cn.com/problems/integer-break/solution/343-zheng-shu-chai-fen-by-tonngw-jped/)」
- [96. 不同的二叉搜索树](https://leetcode-cn.com/problems/unique-binary-search-trees/)「[题解](https://leetcode-cn.com/problems/unique-binary-search-trees/solution/dong-tai-gui-hua-xiang-jie-96-bu-tong-de-uvf4/)」

### 背包问题

- [416. 分割等和子集](https://leetcode-cn.com/problems/partition-equal-subset-sum/)「[题解](https://leetcode-cn.com/problems/partition-equal-subset-sum/solution/416-fen-ge-deng-he-zi-ji-by-tonngw-1w3h/)」
- [1049. 最后一块石头的重量 II](https://leetcode-cn.com/problems/last-stone-weight-ii/)「[题解](https://leetcode-cn.com/problems/last-stone-weight-ii/solution/1049-zui-hou-yi-kuai-shi-tou-de-zhong-li-8vf9/)」
- [494. 目标和](https://leetcode-cn.com/problems/target-sum/)「[题解](https://leetcode-cn.com/problems/target-sum/solution/494-mu-biao-he-by-tonngw-nmoe/)」
- [474. 一和零](https://leetcode-cn.com/problems/ones-and-zeroes/)「[题解](https://leetcode-cn.com/problems/ones-and-zeroes/solution/74-yi-he-ling-er-wei-fei-yong-de-01-bei-aqpd8/)」
- [518. 零钱兑换 II](https://leetcode-cn.com/problems/coin-change-2/)「[题解](https://leetcode-cn.com/problems/coin-change-2/solution/518-ling-qian-dui-huan-iiwan-quan-bei-ba-68wd/)」
- [377. 组合总和 Ⅳ](https://leetcode-cn.com/problems/combination-sum-iv/)「[题解](https://leetcode-cn.com/problems/combination-sum-iv/solution/377-zu-he-zong-he-ivwan-quan-bei-bao-wen-f0rn/)」
- [322. 零钱兑换](https://leetcode-cn.com/problems/coin-change/)「[题解](https://leetcode-cn.com/problems/coin-change/solution/322-ling-qian-dui-huan-by-tonngw-he5h/)」
- [279. 完全平方数](https://leetcode-cn.com/problems/perfect-squares/)「[题解](https://leetcode-cn.com/problems/perfect-squares/solution/279-wan-quan-ping-fang-shu-wan-quan-bei-55juk/)」
- [139. 单词拆分](https://leetcode-cn.com/problems/word-break/)「[题解](https://leetcode-cn.com/problems/word-break/solution/139-dan-ci-chai-fen-by-tonngw-jiaf/)」

### 打家劫舍系列问题

- [198. 打家劫舍](https://leetcode-cn.com/problems/house-robber/)「[题解](https://leetcode-cn.com/problems/house-robber/solution/198-da-jia-jie-she-by-tonngw-ajbc/)」
- [213. 打家劫舍 II](https://leetcode-cn.com/problems/house-robber-ii/)「[题解](https://leetcode-cn.com/problems/house-robber-ii/solution/213-da-jia-jie-she-ii-by-tonngw-pfln/)」
- [337. 打家劫舍 III](https://leetcode-cn.com/problems/house-robber-iii/)「[题解](https://leetcode-cn.com/problems/house-robber-iii/solution/337-da-jia-jie-she-iii-by-tonngw-mg1f/)」

### 股票系列问题

- [121. 买卖股票的最佳时机](https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock/)「[题解](https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock/solution/by-tonngw-ky6p/)」
- [122. 买卖股票的最佳时机 II](https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-ii/)「[题解](https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-ii/solution/si-lu-qing-xi-dai-ma-jian-ji-de-ti-jie-1-xlap/)」
- [123. 买卖股票的最佳时机 III](https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-iii/)「[题解](https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-iii/solution/123-mai-mai-gu-piao-de-zui-jia-shi-ji-ii-q6vh/)」
- [188. 买卖股票的最佳时机 IV](https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-iv/)「[题解](https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-iv/solution/zhuang-tai-ji-dpxiang-jie-188-mai-mai-gu-po3i/)」
- [309. 最佳买卖股票时机含冷冻期](https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-with-cooldown/)「[题解](https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-with-cooldown/solution/zhuang-tai-ji-dp-309-zui-jia-mai-mai-gu-dylw4/)」
- [714. 买卖股票的最佳时机含手续费](https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-with-transaction-fee/)「[题解](https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-with-transaction-fee/solution/zhuang-tai-ji-dp-wen-ti-714-mai-mai-gu-p-dgos/)」

### 子序列系列问题

- [300. 最长递增子序列](https://leetcode-cn.com/problems/longest-increasing-subsequence/)「[题解](https://leetcode-cn.com/problems/longest-increasing-subsequence/solution/300-zui-chang-di-zeng-zi-xu-lie-by-tonng-0mvw/)」
- [674. 最长连续递增序列](https://leetcode-cn.com/problems/longest-continuous-increasing-subsequence/)「[题解](https://leetcode-cn.com/problems/longest-continuous-increasing-subsequence/solution/674-zui-chang-lian-xu-di-zeng-xu-lie-by-0ffva/)」
- [718. 最长重复子数组](https://leetcode-cn.com/problems/maximum-length-of-repeated-subarray/)「[题解](https://leetcode-cn.com/problems/maximum-length-of-repeated-subarray/solution/718-zui-chang-zhong-fu-zi-shu-zu-by-tonn-e57a/)」
- [1143. 最长公共子序列](https://leetcode-cn.com/problems/longest-common-subsequence/)「[题解](https://leetcode-cn.com/problems/longest-common-subsequence/solution/1143-zui-chang-gong-gong-zi-xu-lie-by-to-2hul/)」
- [1035. 不相交的线](https://leetcode-cn.com/problems/uncrossed-lines/)「[题解](https://leetcode-cn.com/problems/uncrossed-lines/solution/1035-bu-xiang-jiao-de-xian-by-tonngw-999m/)」
- [53. 最大子数组和](https://leetcode-cn.com/problems/maximum-subarray/)「[题解](https://leetcode-cn.com/problems/maximum-subarray/solution/53-zui-da-zi-xu-he-by-tonngw-9jx5/)」
- [392. 判断子序列](https://leetcode-cn.com/problems/is-subsequence/)「[题解](https://leetcode-cn.com/problems/is-subsequence/solution/392-pan-duan-zi-xu-lie-by-tonngw-slxn/)」
- [115. 不同的子序列](https://leetcode-cn.com/problems/distinct-subsequences/)「[题解](https://leetcode-cn.com/problems/distinct-subsequences/solution/115-bu-tong-de-zi-xu-lie-by-tonngw-a77n/)」
- [583. 两个字符串的删除操作](https://leetcode-cn.com/problems/delete-operation-for-two-strings/)「[题解](https://leetcode-cn.com/problems/delete-operation-for-two-strings/solution/583-liang-ge-zi-fu-chuan-de-shan-chu-cao-2kg9/)」
- [72. 编辑距离](https://leetcode-cn.com/problems/edit-distance/)「[题解](https://leetcode-cn.com/problems/edit-distance/solution/72-bian-ji-ju-chi-by-tonngw-2jch/)」
- [647. 回文子串](https://leetcode-cn.com/problems/palindromic-substrings/)「[题解](https://leetcode-cn.com/problems/palindromic-substrings/solution/647-hui-wen-zi-chuan-by-tonngw-4ftv/)」
- [516. 最长回文子序列](https://leetcode-cn.com/problems/longest-palindromic-subsequence/)「[题解](https://leetcode-cn.com/problems/longest-palindromic-subsequence/solution/516-zui-chang-hui-wen-zi-xu-lie-by-tonng-p32p/)」
- [5. 最长回文子串](https://leetcode-cn.com/problems/longest-palindromic-substring/)「[题解](https://leetcode-cn.com/problems/longest-palindromic-substring/solution/5-zui-chang-hui-wen-zi-chuan-by-tonngw-1i6u/)」

## 单调栈

- [739. 每日温度](https://leetcode-cn.com/problems/daily-temperatures/)「[题解](https://leetcode-cn.com/problems/daily-temperatures/solution/739-mei-ri-wen-du-by-tonngw-g24w/)」
- [496. 下一个更大元素 I](https://leetcode-cn.com/problems/next-greater-element-i/)「[题解](https://leetcode-cn.com/problems/next-greater-element-i/solution/496-xia-yi-ge-geng-da-yuan-su-i-by-tonng-eae4/)」
- [503. 下一个更大元素 II](https://leetcode-cn.com/problems/next-greater-element-ii/)「[题解](https://leetcode-cn.com/problems/next-greater-element-ii/solution/503-xia-yi-ge-geng-da-yuan-su-ii-by-tonn-m9p6/)」
- [42. 接雨水](https://leetcode-cn.com/problems/trapping-rain-water/)「[题解](https://leetcode-cn.com/problems/trapping-rain-water/solution/42-jie-yu-shui-san-ci-xian-xing-sao-miao-15ks/)」
- [84. 柱状图中最大的矩形](https://leetcode-cn.com/problems/largest-rectangle-in-histogram/)「[题解](https://leetcode-cn.com/problems/largest-rectangle-in-histogram/solution/84-zhu-zhuang-tu-zhong-zui-da-de-ju-xing-gjcg/)」

## 滑动窗口问题

- [239. 滑动窗口最大值](https://leetcode-cn.com/problems/sliding-window-maximum/)「[题解](https://leetcode-cn.com/problems/sliding-window-maximum/solution/239-hua-dong-chuang-kou-zui-da-zhi-by-to-aac7/)」
- [918. 环形子数组的最大和](https://leetcode-cn.com/problems/maximum-sum-circular-subarray/)「[题解](https://leetcode-cn.com/problems/maximum-sum-circular-subarray/solution/918-huan-xing-zi-shu-zu-de-zui-da-he-ton-9d7b/)」
- [3. 无重复字符的最长子串](https://leetcode-cn.com/problems/longest-substring-without-repeating-characters/)「[题解](https://leetcode-cn.com/problems/longest-substring-without-repeating-characters/solution/by-tonngw-vu6h/)」
- [76. 最小覆盖子串](https://leetcode-cn.com/problems/minimum-window-substring/)「[题解](https://leetcode-cn.com/problems/minimum-window-substring/solution/hua-dong-chuang-kou-suan-fa-76-zui-xiao-3y39p/)」
- [209. 长度最小的子数组](https://leetcode-cn.com/problems/minimum-size-subarray-sum/)「[题解](https://leetcode-cn.com/problems/minimum-size-subarray-sum/solution/209-chang-du-zui-xiao-de-zi-shu-zu-by-to-3ryl/)」
- [438. 找到字符串中所有字母异位词](https://leetcode-cn.com/problems/find-all-anagrams-in-a-string/)「[题解](https://leetcode-cn.com/problems/find-all-anagrams-in-a-string/solution/438-zhao-dao-zi-fu-chuan-zhong-suo-you-z-q79l/)」
- [904. 水果成篮](https://leetcode-cn.com/problems/fruit-into-baskets/)「[题解](https://leetcode-cn.com/problems/fruit-into-baskets/solution/904-shui-guo-cheng-lan-by-tonngw-yr8e/)」

## 参考资料：

- [代码随想录](https://programmercarl.com/)
- [AcWing LeetCode 究极班](https://www.acwing.com/activity/content/31/)

## Star History

[![Star History Chart](https://api.star-history.com/svg?repos=tonngw/LeetCode021&type=Date)](https://star-history.com/#tonngw/LeetCode021&Date)

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