leetcode必刷题整理--目录
====================
第一周：
2020.03.02
验证回文串
https://leetcode-cn.com/problems/valid-palindrome/
2020.03.03
亲密字符串
https://leetcode-cn.com/problems/buddy-strings/
2020.03.04
反转字符串中的单词
https://leetcode-cn.com/problems/reverse-words-in-a-string-iii/
2020.03.05
三数之和-3sum
https://leetcode-cn.com/problems/3sum/
附加题：三数之和的多种可能
https://leetcode-cn.com/problems/3sum-with-multiplicity/
2020.03.06
数组中第k大的数
https://leetcode-cn.com/problems/kth-largest-element-in-an-array/
2020.03.07
环形链表
https://leetcode-cn.com/problems/linked-list-cycle-ii/
附加题：翻转链表
https://leetcode-cn.com/problems/fan-zhuan-lian-biao-lcof/
2020.03.08
最长无重复的子串
https://leetcode-cn.com/problems/longest-substring-without-repeating-characters/
附加题：数组逆序对
https://leetcode-cn.com/problems/shu-zu-zhong-de-ni-xu-dui-lcof/
====================
第二周：
2020.03.09
排序链表
https://leetcode-cn.com/problems/sort-list/
附加题：合并k个排序链表
https://leetcode-cn.com/problems/merge-k-sorted-lists/
2020.03.10
删除链表重复元素
https://leetcode-cn.com/problems/remove-duplicates-from-sorted-list-ii/
附加题：删除链表n个节点
https://leetcode-cn.com/problems/remove-nth-node-from-end-of-list/
2020.03.11
复杂链表的复制
https://leetcode-cn.com/problems/fu-za-lian-biao-de-fu-zhi-lcof/
附加题：复制带随机指针的链表
https://leetcode-cn.com/problems/copy-list-with-random-pointer/
2020.03.12
平衡二叉树
https://leetcode-cn.com/problems/balanced-binary-tree/
附加题：重建二叉树
https://leetcode-cn.com/problems/zhong-jian-er-cha-shu-lcof/
2020.03.13
二叉树的镜像
https://leetcode-cn.com/problems/er-cha-shu-de-jing-xiang-lcof/
附加题：二叉树的子结构
https://leetcode-cn.com/problems/shu-de-zi-jie-gou-lcof/
2020.03.14
从上到下打印二叉树
https://leetcode-cn.com/problems/cong-shang-dao-xia-da-yin-er-cha-shu-lcof/
附加题：之字形打印二叉树
https://leetcode-cn.com/problems/cong-shang-dao-xia-da-yin-er-cha-shu-iii-lcof/
2020.03.15
二叉树和为某一值的路径
https://leetcode-cn.com/problems/er-cha-shu-zhong-he-wei-mou-yi-zhi-de-lu-jing-lcof/
附加题：二叉树最大路径和
https://leetcode-cn.com/problems/binary-tree-maximum-path-sum/
====================
第三周：
2020.03.16
验证二叉搜索树
https://leetcode-cn.com/problems/validate-binary-search-tree/
卡
附加题：二叉搜索树和双向链表
https://leetcode-cn.com/problems/er-cha-sou-suo-shu-yu-shuang-xiang-lian-biao-lcof/
2020.03.17
二叉搜索树的第k大节点
https://leetcode-cn.com/problems/er-cha-sou-suo-shu-de-di-kda-jie-dian-lcof/
附加题：验证二叉搜索树
https://leetcode-cn.com/problems/validate-binary-search-tree/
2020.03.18
二叉树的最小深度
https://leetcode-cn.com/problems/minimum-depth-of-binary-tree/
题2：被围绕的区域
https://leetcode-cn.com/problems/surrounded-regions/
仔细研究那两道题的思路，体会之间的相关性
2020.03.19
岛屿数量
https://leetcode-cn.com/problems/number-of-islands/
附加题：扫雷游戏
https://leetcode-cn.com/problems/minesweeper/
2020.3.20
被围绕的区域
https://leetcode-cn.com/problems/surrounded-regions/
附加题 岛屿数量
https://leetcode-cn.com/problems/surrounded-regions/
2020.3.21
腐烂的橘子
https://leetcode-cn.com/problems/rotting-oranges/
2020.3.22
二叉树的右视图
https://leetcode-cn.com/problems/binary-tree-right-side-view/
DFS 路径总和
https://leetcode-cn.com/problems/path-sum/