| 206. 反转链表 | 5 | https://leetcode-cn.com/problems/reverse-linked-list |
| 53. 最大子序和 | 4 | https://leetcode-cn.com/problems/maximum-subarray |
| 1143. 最长公共子序列 | 3 | https://leetcode-cn.com/problems/longest-common-subsequence |
| 442. 数组中重复的数据 | 2 | https://leetcode-cn.com/problems/find-all-duplicates-in-an-array |
| 300. 最长上升子序列 | 2 | https://leetcode-cn.com/problems/longest-increasing-subsequence |
| 8. 字符串转换整数 (atoi) | 2 | https://leetcode-cn.com/problems/string-to-integer-atoi |
| 215. 数组中的第K个最大元素 | 2 | https://leetcode-cn.com/problems/kth-largest-element-in-an-array |
| 121. 买卖股票的最佳时机 | 2 | https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock |
| 141. 环形链表 | 1 | https://leetcode-cn.com/problems/linked-list-cycle |
| 21. 合并两个有序链表 | 1 | https://leetcode-cn.com/problems/merge-two-sorted-lists |
| 494. 目标和 | 1 | https://leetcode-cn.com/problems/target-sum |
| 227. 基本计算器 II | 1 | https://leetcode-cn.com/problems/basic-calculator-ii |
| 72. 编辑距离 | 1 | https://leetcode-cn.com/problems/edit-distance |
| 633. 平方数之和 | 1 | https://leetcode-cn.com/problems/sum-of-square-numbers |
| 125. 验证回文串 | 1 | https://leetcode-cn.com/problems/valid-palindrome |
| 152. 乘积最大子数组 | 1 | https://leetcode-cn.com/problems/maximum-product-subarray |
| 15. 三数之和 | 1 | https://leetcode-cn.com/problems/3sum |
| 105. 从前序与中序遍历序列构造二叉树 | 1 | https://leetcode-cn.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal |
| 148. 排序链表 | 1 | https://leetcode-cn.com/problems/sort-list |
| 239. 滑动窗口最大值 | 1 | https://leetcode-cn.com/problems/sliding-window-maximum |
| 22. 括号生成 | 1 | https://leetcode-cn.com/problems/generate-parentheses |
| 75. 颜色分类 | 1 | https://leetcode-cn.com/problems/sort-colors |
| 20. 有效的括号 | 1 | https://leetcode-cn.com/problems/valid-parentheses |
| 169. 多数元素 | 1 | https://leetcode-cn.com/problems/majority-element |
| 171. Excel表列序号 | 1 | https://leetcode-cn.com/problems/excel-sheet-column-number |
| 5. 最长回文子串 | 1 | https://leetcode-cn.com/problems/longest-palindromic-substring |
| 43. 字符串相乘 | 1 | https://leetcode-cn.com/problems/multiply-strings |
| 63. 不同路径 II | 1 | https://leetcode-cn.com/problems/unique-paths-ii |
| 146. LRU缓存机制 | 1 | https://leetcode-cn.com/problems/lru-cache |
| 补充题6. 手撕堆排序 | 1 | https://leetcode-cn.com/problems/sort-an-array |
| 160. 相交链表 | 1 | https://leetcode-cn.com/problems/intersection-of-two-linked-lists |
| 补充题4. 手撕快速排序 | 1 | https://leetcode-cn.com/problems/sort-an-array |
| 113. 路径总和 II | 1 | https://leetcode-cn.com/problems/path-sum-ii |