| 206. 反转链表 | 6 | https://leetcode-cn.com/problems/reverse-linked-list |
| 142. 环形链表 II | 3 | https://leetcode-cn.com/problems/linked-list-cycle-ii |
| 21. 合并两个有序链表 | 2 | https://leetcode-cn.com/problems/merge-two-sorted-lists |
| 78. 子集 | 2 | https://leetcode-cn.com/problems/subsets |
| 103. 二叉树的锯齿形层次遍历 | 2 | https://leetcode-cn.com/problems/binary-tree-zigzag-level-order-traversal |
| 144. 二叉树的前序遍历 | 2 | https://leetcode-cn.com/problems/binary-tree-preorder-traversal |
| 110. 平衡二叉树 | 2 | https://leetcode-cn.com/problems/balanced-binary-tree |
| 剑指 Offer 21. 调整数组顺序使奇数位于偶数前面 | 2 | https://leetcode-cn.com/problems/diao-zheng-shu-zu-shun-xu-shi-qi-shu-wei-yu-ou-shu-qian-mian-lcof |
| 102. 二叉树的层序遍历 | 2 | https://leetcode-cn.com/problems/binary-tree-level-order-traversal |
| 704. 二分查找 | 2 | https://leetcode-cn.com/problems/binary-search |
| 300. 最长上升子序列 | 1 | https://leetcode-cn.com/problems/longest-increasing-subsequence |
| 121. 买卖股票的最佳时机 | 1 | https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock |
| 1. 两数之和 | 1 | https://leetcode-cn.com/problems/two-sum |
| 283. 移动零 | 1 | https://leetcode-cn.com/problems/move-zeroes |
| 415. 字符串相加 | 1 | https://leetcode-cn.com/problems/add-strings |
| 200. 岛屿数量 | 1 | https://leetcode-cn.com/problems/number-of-islands |
| 3. 无重复字符的最长子串 | 1 | https://leetcode-cn.com/problems/longest-substring-without-repeating-characters |
| 11. 盛最多水的容器 | 1 | https://leetcode-cn.com/problems/container-with-most-water |
| 167. 两数之和 II - 输入有序数组 | 1 | https://leetcode-cn.com/problems/two-sum-ii-input-array-is-sorted |
| 470. 用 Rand7() 实现 Rand10() | 1 | https://leetcode-cn.com/problems/implement-rand10-using-rand7 |
| 189. 旋转数组 | 1 | https://leetcode-cn.com/problems/rotate-array |
| 459. 重复的子字符串 | 1 | https://leetcode-cn.com/problems/repeated-substring-pattern |
| 129. 求根到叶子节点数字之和 | 1 | https://leetcode-cn.com/problems/sum-root-to-leaf-numbers |
| 312. 戳气球 | 1 | https://leetcode-cn.com/problems/burst-balloons |
| 69. x 的平方根 | 1 | https://leetcode-cn.com/problems/sqrtx |
| 718. 最长重复子数组 | 1 | https://leetcode-cn.com/problems/maximum-length-of-repeated-subarray |
| 24. 两两交换链表中的节点 | 1 | https://leetcode-cn.com/problems/swap-nodes-in-pairs |
| 146. LRU缓存机制 | 1 | https://leetcode-cn.com/problems/lru-cache |
| 剑指 Offer 64. 求1+2+…+n | 1 | https://leetcode-cn.com/problems/qiu-12n-lcof |
| 70. 爬楼梯 | 1 | https://leetcode-cn.com/problems/climbing-stairs |
| 剑指 Offer 24. 反转链表 | 1 | https://leetcode-cn.com/problems/fan-zhuan-lian-biao-lcof |
| 232. 用栈实现队列 | 1 | https://leetcode-cn.com/problems/implement-queue-using-stacks |
| 919. 完全二叉树插入器 | 1 | https://leetcode-cn.com/problems/complete-binary-tree-inserter |
| 19. 删除链表的倒数第N个节点 | 1 | https://leetcode-cn.com/problems/remove-nth-node-from-end-of-list |
| 109. 有序链表转换二叉搜索树 | 1 | https://leetcode-cn.com/problems/convert-sorted-list-to-binary-search-tree |
| 104. 二叉树的最大深度 | 1 | https://leetcode-cn.com/problems/maximum-depth-of-binary-tree |
| 53. 最大子序和 | 1 | https://leetcode-cn.com/problems/maximum-subarray |
| 补充题4. 手撕快速排序 | 1 | |