| 3. 无重复字符的最长子串 | 2 | https://leetcode-cn.com/problems/longest-substring-without-repeating-characters |
| 146. LRU缓存机制 | 2 | https://leetcode-cn.com/problems/lru-cache |
| 120. 三角形最小路径和 | 2 | https://leetcode-cn.com/problems/triangle |
| 102. 二叉树的层序遍历 | 2 | https://leetcode-cn.com/problems/binary-tree-level-order-traversal |
| 110. 平衡二叉树 | 2 | https://leetcode-cn.com/problems/balanced-binary-tree |
| 200. 岛屿数量 | 1 | https://leetcode-cn.com/problems/number-of-islands |
| 10. 正则表达式匹配 | 1 | https://leetcode-cn.com/problems/regular-expression-matching |
| 129. 求根到叶子节点数字之和 | 1 | https://leetcode-cn.com/problems/sum-root-to-leaf-numbers |
| 227. 基本计算器 II | 1 | https://leetcode-cn.com/problems/basic-calculator-ii |
| 343. 整数拆分 | 1 | https://leetcode-cn.com/problems/integer-break |
| 215. 数组中的第K个最大元素 | 1 | https://leetcode-cn.com/problems/kth-largest-element-in-an-array |
| 121. 买卖股票的最佳时机 | 1 | https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock |
| 剑指 Offer 53 - II. 0~n-1中缺失的数字 | 1 | https://leetcode-cn.com/problems/que-shi-de-shu-zi-lcof |
| 378. 有序矩阵中第K小的元素 | 1 | https://leetcode-cn.com/problems/kth-smallest-element-in-a-sorted-matrix |
| 8. 字符串转换整数 (atoi) | 1 | https://leetcode-cn.com/problems/string-to-integer-atoi |
| 486. 预测赢家 | 1 | https://leetcode-cn.com/problems/predict-the-winner |
| 15. 三数之和 | 1 | https://leetcode-cn.com/problems/3sum |
| 781. 森林中的兔子 | 1 | https://leetcode-cn.com/problems/rabbits-in-forest |
| 剑指 Offer 36. 二叉搜索树与双向链表 | 1 | https://leetcode-cn.com/problems/er-cha-sou-suo-shu-yu-shuang-xiang-lian-biao-lcof |
| 46. 全排列 | 1 | https://leetcode-cn.com/problems/permutations |
| 23. 合并K个排序链表 | 1 | https://leetcode-cn.com/problems/merge-k-sorted-lists |
| 460. LFU缓存 | 1 | https://leetcode-cn.com/problems/lfu-cache |
| 2. 两数相加 | 1 | https://leetcode-cn.com/problems/add-two-numbers |
| 4. 寻找两个正序数组的中位数 | 1 | https://leetcode-cn.com/problems/median-of-two-sorted-arrays |
| 611. 有效三角形的个数 | 1 | https://leetcode-cn.com/problems/valid-triangle-number |
| 面试题 08.05. 递归乘法 | 1 | https://leetcode-cn.com/problems/recursive-mulitply-lcci |