| 53. 最大子序和 | 5 | https://leetcode-cn.com/problems/maximum-subarray |
| 206. 反转链表 | 3 | https://leetcode-cn.com/problems/reverse-linked-list |
| 110. 平衡二叉树 | 2 | https://leetcode-cn.com/problems/balanced-binary-tree |
| 144. 二叉树的前序遍历 | 2 | https://leetcode-cn.com/problems/binary-tree-preorder-traversal |
| 54. 螺旋矩阵 | 2 | https://leetcode-cn.com/problems/spiral-matrix |
| 剑指 Offer 22. 链表中倒数第k个节点 | 2 | https://leetcode-cn.com/problems/lian-biao-zhong-dao-shu-di-kge-jie-dian-lcof |
| 215. 数组中的第K个最大元素 | 1 | https://leetcode-cn.com/problems/kth-largest-element-in-an-array |
| 300. 最长上升子序列 | 1 | https://leetcode-cn.com/problems/longest-increasing-subsequence |
| 146. LRU缓存机制 | 1 | https://leetcode-cn.com/problems/lru-cache |
| 88. 合并两个有序数组 | 1 | https://leetcode-cn.com/problems/merge-sorted-array |
| 94. 二叉树的中序遍历 | 1 | https://leetcode-cn.com/problems/binary-tree-inorder-traversal |
| 补充题4. 手撕快速排序 | 1 | https://leetcode-cn.com/problems/sort-an-array |
| 224. 基本计算器 | 1 | https://leetcode-cn.com/problems/basic-calculator |
| 152. 乘积最大子数组 | 1 | https://leetcode-cn.com/problems/maximum-product-subarray |
| 232. 用栈实现队列 | 1 | https://leetcode-cn.com/problems/implement-queue-using-stacks |
| 102. 二叉树的层序遍历 | 1 | https://leetcode-cn.com/problems/binary-tree-level-order-traversal |
| 69. x 的平方根 | 1 | https://leetcode-cn.com/problems/sqrtx |
| 补充题5. 手撕归并排序 | 1 | https://leetcode-cn.com/problems/sort-an-array |
| 41. 缺失的第一个正数 | 1 | https://leetcode-cn.com/problems/first-missing-positive |
| 14. 最长公共前缀 | 1 | https://leetcode-cn.com/problems/longest-common-prefix |
| 160. 相交链表 | 1 | https://leetcode-cn.com/problems/intersection-of-two-linked-lists |
| 剑指 Offer 31. 栈的压入、弹出序列 | 1 | https://leetcode-cn.com/problems/zhan-de-ya-ru-dan-chu-xu-lie-lcof |
| 141. 环形链表 | 1 | https://leetcode-cn.com/problems/linked-list-cycle |
| 226. 翻转二叉树 | 1 | https://leetcode-cn.com/problems/invert-binary-tree |
| 704. 二分查找 | 1 | https://leetcode-cn.com/problems/binary-search |
| 2. 两数相加 | 1 | https://leetcode-cn.com/problems/add-two-numbers |
| 剑指 Offer 54. 二叉搜索树的第k大节点 | 1 | https://leetcode-cn.com/problems/er-cha-sou-suo-shu-de-di-kda-jie-dian-lcof |
| 142. 环形链表 II | 1 | https://leetcode-cn.com/problems/linked-list-cycle-ii |
| 3. 无重复字符的最长子串 | 1 | https://leetcode-cn.com/problems/longest-substring-without-repeating-characters |