| 3. 无重复字符的最长子串 |
18 |
https://leetcode-cn.com/problems/longest-substring-without-repeating-characters |
| 88. 合并两个有序数组 |
17 |
https://leetcode-cn.com/problems/merge-sorted-array |
| 129. 求根到叶子节点数字之和 |
15 |
https://leetcode-cn.com/problems/sum-root-to-leaf-numbers |
| 112. 路径总和 |
13 |
https://leetcode-cn.com/problems/path-sum |
| 53. 最大子序和 |
12 |
https://leetcode-cn.com/problems/maximum-subarray |
| 1. 两数之和 |
11 |
https://leetcode-cn.com/problems/two-sum |
| 165. 比较版本号 |
11 |
https://leetcode-cn.com/problems/compare-version-numbers |
| 215. 数组中的第K个最大元素 |
10 |
https://leetcode-cn.com/problems/kth-largest-element-in-an-array |
| 209. 长度最小的子数组 |
8 |
https://leetcode-cn.com/problems/minimum-size-subarray-sum |
| 剑指 Offer 22. 链表中倒数第k个节点 |
8 |
https://leetcode-cn.com/problems/lian-biao-zhong-dao-shu-di-kge-jie-dian-lcof |
| 415. 字符串相加 |
8 |
https://leetcode-cn.com/problems/add-strings |
| 46. 全排列 |
8 |
https://leetcode-cn.com/problems/permutations |
| 206. 反转链表 |
7 |
https://leetcode-cn.com/problems/reverse-linked-list |
| 102. 二叉树的层序遍历 |
6 |
https://leetcode-cn.com/problems/binary-tree-level-order-traversal |
| 70. 爬楼梯 |
6 |
https://leetcode-cn.com/problems/climbing-stairs |
| 54. 螺旋矩阵 |
6 |
https://leetcode-cn.com/problems/spiral-matrix |
| 93. 复原IP地址 |
5 |
https://leetcode-cn.com/problems/restore-ip-addresses |
| 200. 岛屿数量 |
5 |
https://leetcode-cn.com/problems/number-of-islands |
| 230. 二叉搜索树中第K小的元素 |
5 |
https://leetcode-cn.com/problems/kth-smallest-element-in-a-bst |
| 15. 三数之和 |
5 |
https://leetcode-cn.com/problems/3sum |
| 141. 环形链表 |
5 |
https://leetcode-cn.com/problems/linked-list-cycle |
| 429. N叉树的层序遍历 |
5 |
https://leetcode-cn.com/problems/n-ary-tree-level-order-traversal |
| 226. 翻转二叉树 |
4 |
https://leetcode-cn.com/problems/invert-binary-tree |
| 121. 买卖股票的最佳时机 |
4 |
https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock |
| 718. 最长重复子数组 |
4 |
https://leetcode-cn.com/problems/maximum-length-of-repeated-subarray |
| 160. 相交链表 |
4 |
https://leetcode-cn.com/problems/intersection-of-two-linked-lists |
| 695. 岛屿的最大面积 |
4 |
https://leetcode-cn.com/problems/max-area-of-island |
| 62. 不同路径 |
4 |
https://leetcode-cn.com/problems/unique-paths |
| 剑指 Offer 62. 圆圈中最后剩下的数字 |
4 |
https://leetcode-cn.com/problems/yuan-quan-zhong-zui-hou-sheng-xia-de-shu-zi-lcof |
| 94. 二叉树的中序遍历 |
3 |
https://leetcode-cn.com/problems/binary-tree-inorder-traversal |
| 104. 二叉树的最大深度 |
3 |
https://leetcode-cn.com/problems/maximum-depth-of-binary-tree |
| 21. 合并两个有序链表 |
3 |
https://leetcode-cn.com/problems/merge-two-sorted-lists |
| 509. 斐波那契数 |
3 |
https://leetcode-cn.com/problems/fibonacci-number |
| 113. 路径总和 II |
3 |
https://leetcode-cn.com/problems/path-sum-ii |
| 468. 验证IP地址 |
3 |
https://leetcode-cn.com/problems/validate-ip-address |
| 31. 下一个排列 |
3 |
https://leetcode-cn.com/problems/next-permutation |
| 20. 有效的括号 |
3 |
https://leetcode-cn.com/problems/valid-parentheses |
| 349. 两个数组的交集 |
3 |
https://leetcode-cn.com/problems/intersection-of-two-arrays |
| 5. 最长回文子串 |
3 |
https://leetcode-cn.com/problems/longest-palindromic-substring |
| 236. 二叉树的最近公共祖先 |
3 |
https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-tree |
| 146. LRU缓存机制 |
3 |
https://leetcode-cn.com/problems/lru-cache |
| 322. 零钱兑换 |
2 |
https://leetcode-cn.com/problems/coin-change |
| 394. 字符串解码 |
2 |
https://leetcode-cn.com/problems/decode-string |
| 19. 删除链表的倒数第N个节点 |
2 |
https://leetcode-cn.com/problems/remove-nth-node-from-end-of-list |
| 剑指 Offer 24. 反转链表 |
2 |
https://leetcode-cn.com/problems/fan-zhuan-lian-biao-lcof |
| 42. 接雨水 |
2 |
https://leetcode-cn.com/problems/trapping-rain-water |
| 155. 最小栈 |
2 |
https://leetcode-cn.com/problems/min-stack |
| 169. 多数元素 |
2 |
https://leetcode-cn.com/problems/majority-element |
| 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 |
| 67. 二进制求和 |
2 |
https://leetcode-cn.com/problems/add-binary |
| 144. 二叉树的前序遍历 |
2 |
https://leetcode-cn.com/problems/binary-tree-preorder-traversal |
| 198. 打家劫舍 |
2 |
https://leetcode-cn.com/problems/house-robber |
| 14. 最长公共前缀 |
2 |
https://leetcode-cn.com/problems/longest-common-prefix |
| 补充题3. 求区间最小数乘区间和的最大值 |
2 |
https://mp.weixin.qq.com/s/UFv7pt_djjZoK_gzUBrRXA |
| 199. 二叉树的右视图 |
2 |
https://leetcode-cn.com/problems/binary-tree-right-side-view |
| 剑指 Offer 09. 用两个栈实现队列 |
2 |
https://leetcode-cn.com/problems/yong-liang-ge-zhan-shi-xian-dui-lie-lcof |
| 56. 合并区间 |
2 |
https://leetcode-cn.com/problems/merge-intervals |
| 300. 最长上升子序列 |
2 |
https://leetcode-cn.com/problems/longest-increasing-subsequence |
| 剑指 Offer 38. 字符串的排列 |
2 |
https://leetcode-cn.com/problems/zi-fu-chuan-de-pai-lie-lcof |
| 补充题14. 阿拉伯数字转中文数字 |
2 |
|
| 400. 第N个数字 |
2 |
https://leetcode-cn.com/problems/nth-digit |
| 101. 对称二叉树 |
2 |
https://leetcode-cn.com/problems/symmetric-tree |
| 剑指 Offer 48. 最长不含重复字符的子字符串 |
1 |
https://leetcode-cn.com/problems/zui-chang-bu-han-zhong-fu-zi-fu-de-zi-zi-fu-chuan-lcof |
| 680. 验证回文字符串 Ⅱ |
1 |
https://leetcode-cn.com/problems/valid-palindrome-ii |
| 124. 二叉树中的最大路径和 |
1 |
https://leetcode-cn.com/problems/binary-tree-maximum-path-sum |
| 221. 最大正方形 |
1 |
https://leetcode-cn.com/problems/maximal-square |
| 98. 验证二叉搜索树 |
1 |
https://leetcode-cn.com/problems/validate-binary-search-tree |
| 1047. 删除字符串中的所有相邻重复项 |
1 |
https://leetcode-cn.com/problems/remove-all-adjacent-duplicates-in-string |
| 44. 通配符匹配 |
1 |
https://leetcode-cn.com/problems/wildcard-matching |
| 130. 被围绕的区域 |
1 |
https://leetcode-cn.com/problems/surrounded-regions |
| 16. 最接近的三数之和 |
1 |
https://leetcode-cn.com/problems/3sum-closest |
| 498. 对角线遍历 |
1 |
https://leetcode-cn.com/problems/diagonal-traverse |
| 224. 基本计算器 |
1 |
https://leetcode-cn.com/problems/basic-calculator |
| 227. 基本计算器 II |
1 |
https://leetcode-cn.com/problems/basic-calculator-ii |
| 剑指 Offer 04. 二维数组中的查找 |
1 |
https://leetcode-cn.com/problems/er-wei-shu-zu-zhong-de-cha-zhao-lcof |
| 443. 压缩字符串 |
1 |
https://leetcode-cn.com/problems/string-compression |
| 142. 环形链表 II |
1 |
https://leetcode-cn.com/problems/linked-list-cycle-ii |
| 984. 不含 AAA 或 BBB 的字符串 |
1 |
https://leetcode-cn.com/problems/string-without-aaa-or-bbb |
| 151. 翻转字符串里的单词 |
1 |
https://leetcode-cn.com/problems/reverse-words-in-a-string |
| 213. 打家劫舍 II |
1 |
https://leetcode-cn.com/problems/house-robber-ii |
| 114. 二叉树展开为链表 |
1 |
https://leetcode-cn.com/problems/flatten-binary-tree-to-linked-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 |
| 242. 有效的字母异位词 |
1 |
https://leetcode-cn.com/problems/valid-anagram |
| 862. 和至少为 K 的最短子数组 |
1 |
https://leetcode-cn.com/problems/shortest-subarray-with-sum-at-least-k |
| 1498. 满足条件的子序列数目 |
1 |
https://leetcode-cn.com/problems/number-of-subsequences-that-satisfy-the-given-sum-condition |
| 257. 二叉树的所有路径 |
1 |
https://leetcode-cn.com/problems/binary-tree-paths |
| 63. 不同路径 II |
1 |
https://leetcode-cn.com/problems/unique-paths-ii |
| 609. 在系统中查找重复文件 |
1 |
https://leetcode-cn.com/problems/find-duplicate-file-in-system |
| 232. 用栈实现队列 |
1 |
https://leetcode-cn.com/problems/implement-queue-using-stacks |
| 39. 组合总和 |
1 |
https://leetcode-cn.com/problems/combination-sum |
| 剑指 Offer 10- I. 斐波那契数列 |
1 |
https://leetcode-cn.com/problems/fei-bo-na-qi-shu-lie-lcof |
| 361. 轰炸敌人 |
1 |
https://leetcode-cn.com/problems/bomb-enemy |
| 525. 连续数组 |
1 |
https://leetcode-cn.com/problems/contiguous-array |
| 96. 不同的二叉搜索树 |
1 |
https://leetcode-cn.com/problems/unique-binary-search-trees |
| 103. 二叉树的锯齿形层次遍历 |
1 |
https://leetcode-cn.com/problems/binary-tree-zigzag-level-order-traversal |
| 717. 1比特与2比特字符 |
1 |
https://leetcode-cn.com/problems/1-bit-and-2-bit-characters |
| 1353. 最多可以参加的会议数目 |
1 |
https://leetcode-cn.com/problems/maximum-number-of-events-that-can-be-attended |
| 剑指 Offer 63. 股票的最大利润 |
1 |
https://leetcode-cn.com/problems/gu-piao-de-zui-da-li-run-lcof |
| 剑指 Offer 27. 二叉树的镜像 |
1 |
https://leetcode-cn.com/problems/er-cha-shu-de-jing-xiang-lcof |
| LCP 04. 覆盖 |
1 |
https://leetcode-cn.com/problems/broken-board-dominoes |
| 剑指 Offer 39. 数组中出现次数超过一半的数字 |
1 |
https://leetcode-cn.com/problems/shu-zu-zhong-chu-xian-ci-shu-chao-guo-yi-ban-de-shu-zi-lcof |
| 剑指 Offer 07. 重建二叉树 |
1 |
https://leetcode-cn.com/problems/zhong-jian-er-cha-shu-lcof |
| 829. 连续整数求和 |
1 |
https://leetcode-cn.com/problems/consecutive-numbers-sum |
| 1356. 根据数字二进制下 1 的数目排序 |
1 |
https://leetcode-cn.com/problems/sort-integers-by-the-number-of-1-bits |
| 6. Z 字形变换 |
1 |
https://leetcode-cn.com/problems/zigzag-conversion |
| 704. 二分查找 |
1 |
https://leetcode-cn.com/problems/binary-search |
| 111. 二叉树的最小深度 |
1 |
https://leetcode-cn.com/problems/minimum-depth-of-binary-tree |
| 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 |
| 783. 二叉搜索树节点最小距离 |
1 |
https://leetcode-cn.com/problems/minimum-distance-between-bst-nodes |
| 剑指 Offer 42. 连续子数组的最大和 |
1 |
https://leetcode-cn.com/problems/lian-xu-zi-shu-zu-de-zui-da-he-lcof |
| 55. 跳跃游戏 |
1 |
https://leetcode-cn.com/problems/jump-game |
| 2. 两数相加 |
1 |
https://leetcode-cn.com/problems/add-two-numbers |
| 1410. HTML 实体解析器 |
1 |
https://leetcode-cn.com/problems/html-entity-parser |
| 125. 验证回文串 |
1 |
https://leetcode-cn.com/problems/valid-palindrome |
| 12. 整数转罗马数字 |
1 |
https://leetcode-cn.com/problems/integer-to-roman |
| 45. 跳跃游戏 II |
1 |
https://leetcode-cn.com/problems/jump-game-ii |
| 43. 字符串相乘 |
1 |
https://leetcode-cn.com/problems/multiply-strings |