| 215. 数组中的第K个最大元素 |
14 |
https://leetcode-cn.com/problems/kth-largest-element-in-an-array |
| 236. 二叉树的最近公共祖先 |
10 |
https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-tree |
| 206. 反转链表 |
9 |
https://leetcode-cn.com/problems/reverse-linked-list |
| 48. 旋转图像 |
9 |
https://leetcode-cn.com/problems/rotate-image |
| 124. 二叉树中的最大路径和 |
7 |
https://leetcode-cn.com/problems/binary-tree-maximum-path-sum |
| 53. 最大子序和 |
7 |
https://leetcode-cn.com/problems/maximum-subarray |
| 91. 解码方法 |
6 |
https://leetcode-cn.com/problems/decode-ways |
| 151. 翻转字符串里的单词 |
6 |
https://leetcode-cn.com/problems/reverse-words-in-a-string |
| 543. 二叉树的直径 |
6 |
https://leetcode-cn.com/problems/diameter-of-binary-tree |
| 297. 二叉树的序列化与反序列化 |
6 |
https://leetcode-cn.com/problems/serialize-and-deserialize-binary-tree |
| 146. LRU缓存机制 |
5 |
https://leetcode-cn.com/problems/lru-cache |
| 450. 删除二叉搜索树中的节点 |
5 |
https://leetcode-cn.com/problems/delete-node-in-a-bst |
| 22. 括号生成 |
5 |
https://leetcode-cn.com/problems/generate-parentheses |
| 47. 全排列 II |
5 |
https://leetcode-cn.com/problems/permutations-ii |
| 224. 基本计算器 |
5 |
https://leetcode-cn.com/problems/basic-calculator |
| 468. 验证IP地址 |
4 |
https://leetcode-cn.com/problems/validate-ip-address |
| 110. 平衡二叉树 |
4 |
https://leetcode-cn.com/problems/balanced-binary-tree |
| 94. 二叉树的中序遍历 |
4 |
https://leetcode-cn.com/problems/binary-tree-inorder-traversal |
| 15. 三数之和 |
4 |
https://leetcode-cn.com/problems/3sum |
| 121. 买卖股票的最佳时机 |
4 |
https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock |
| 39. 组合总和 |
4 |
https://leetcode-cn.com/problems/combination-sum |
| 1. 两数之和 |
4 |
https://leetcode-cn.com/problems/two-sum |
| 3. 无重复字符的最长子串 |
4 |
https://leetcode-cn.com/problems/longest-substring-without-repeating-characters |
| 207. 课程表 |
4 |
https://leetcode-cn.com/problems/course-schedule |
| 138. 复制带随机指针的链表 |
4 |
https://leetcode-cn.com/problems/copy-list-with-random-pointer |
| 69. x 的平方根 |
4 |
https://leetcode-cn.com/problems/sqrtx |
| 240. 搜索二维矩阵 II |
4 |
https://leetcode-cn.com/problems/search-a-2d-matrix-ii |
| 4. 寻找两个正序数组的中位数 |
3 |
https://leetcode-cn.com/problems/median-of-two-sorted-arrays |
| 103. 二叉树的锯齿形层次遍历 |
3 |
https://leetcode-cn.com/problems/binary-tree-zigzag-level-order-traversal |
| 560. 和为K的子数组 |
3 |
https://leetcode-cn.com/problems/subarray-sum-equals-k |
| 162. 寻找峰值 |
3 |
https://leetcode-cn.com/problems/find-peak-element |
| 62. 不同路径 |
3 |
https://leetcode-cn.com/problems/unique-paths |
| 72. 编辑距离 |
3 |
https://leetcode-cn.com/problems/edit-distance |
| 200. 岛屿数量 |
3 |
https://leetcode-cn.com/problems/number-of-islands |
| 89. 格雷编码 |
3 |
https://leetcode-cn.com/problems/gray-code |
| 98. 验证二叉搜索树 |
3 |
https://leetcode-cn.com/problems/validate-binary-search-tree |
| 152. 乘积最大子数组 |
3 |
https://leetcode-cn.com/problems/maximum-product-subarray |
| 384. 打乱数组 |
3 |
https://leetcode-cn.com/problems/shuffle-an-array |
| 37. 解数独 |
3 |
https://leetcode-cn.com/problems/sudoku-solver |
| 36. 有效的数独 |
3 |
https://leetcode-cn.com/problems/valid-sudoku |
| 面试题 08.12. 八皇后 |
3 |
https://leetcode-cn.com/problems/eight-queens-lcci |
| 141. 环形链表 |
3 |
https://leetcode-cn.com/problems/linked-list-cycle |
| 153. 寻找旋转排序数组中的最小值 |
3 |
https://leetcode-cn.com/problems/find-minimum-in-rotated-sorted-array |
| 33. 搜索旋转排序数组 |
3 |
https://leetcode-cn.com/problems/search-in-rotated-sorted-array |
| 剑指 Offer 46. 把数字翻译成字符串 |
2 |
https://leetcode-cn.com/problems/ba-shu-zi-fan-yi-cheng-zi-fu-chuan-lcof |
| 415. 字符串相加 |
2 |
https://leetcode-cn.com/problems/add-strings |
| 986. 区间列表的交集 |
2 |
https://leetcode-cn.com/problems/interval-list-intersections |
| 547. 省份数量（原朋友圈） |
2 |
https://leetcode-cn.com/problems/number-of-provinces |
| 34. 在排序数组中查找元素的第一个和最后一个位置 |
2 |
https://leetcode-cn.com/problems/find-first-and-last-position-of-element-in-sorted-array |
| 142. 环形链表 II |
2 |
https://leetcode-cn.com/problems/linked-list-cycle-ii |
| 154. 寻找旋转排序数组中的最小值 II |
2 |
https://leetcode-cn.com/problems/find-minimum-in-rotated-sorted-array-ii |
| 283. 移动零 |
2 |
https://leetcode-cn.com/problems/move-zeroes |
| 10. 正则表达式匹配 |
2 |
https://leetcode-cn.com/problems/regular-expression-matching |
| 79. 单词搜索 |
2 |
https://leetcode-cn.com/problems/word-search |
| 剑指 Offer 52. 两个链表的第一个公共节点 |
2 |
https://leetcode-cn.com/problems/liang-ge-lian-biao-de-di-yi-ge-gong-gong-jie-dian-lcof |
| 76. 最小覆盖子串 |
2 |
https://leetcode-cn.com/problems/minimum-window-substring |
| 449. 序列化和反序列化二叉搜索树 |
2 |
https://leetcode-cn.com/problems/serialize-and-deserialize-bst |
| 300. 最长上升子序列 |
2 |
https://leetcode-cn.com/problems/longest-increasing-subsequence |
| 剑指 Offer 33. 二叉搜索树的后序遍历序列 |
2 |
https://leetcode-cn.com/problems/er-cha-sou-suo-shu-de-hou-xu-bian-li-xu-lie-lcof |
| 剑指 Offer 04. 二维数组中的查找 |
2 |
https://leetcode-cn.com/problems/er-wei-shu-zu-zhong-de-cha-zhao-lcof |
| 剑指 Offer 51. 数组中的逆序对 |
2 |
https://leetcode-cn.com/problems/shu-zu-zhong-de-ni-xu-dui-lcof |
| 877. 石子游戏 |
2 |
https://leetcode-cn.com/problems/stone-game |
| 59. 螺旋矩阵 II |
2 |
https://leetcode-cn.com/problems/spiral-matrix-ii |
| 25. K 个一组翻转链表 |
2 |
https://leetcode-cn.com/problems/reverse-nodes-in-k-group |
| 287. 寻找重复数 |
2 |
https://leetcode-cn.com/problems/find-the-duplicate-number |
| 362. 敲击计数器 |
2 |
https://leetcode-cn.com/problems/design-hit-counter |
| 119. 杨辉三角 II |
2 |
https://leetcode-cn.com/problems/pascals-triangle-ii |
| 863. 二叉树中所有距离为 K 的结点 |
2 |
https://leetcode-cn.com/problems/all-nodes-distance-k-in-binary-tree |
| 1095. 山脉数组中查找目标值 |
2 |
https://leetcode-cn.com/problems/find-in-mountain-array |
| 295. 数据流的中位数 |
2 |
https://leetcode-cn.com/problems/find-median-from-data-stream |
| 8. 字符串转换整数 (atoi) |
2 |
https://leetcode-cn.com/problems/string-to-integer-atoi |
| 129. 求根到叶子节点数字之和 |
2 |
https://leetcode-cn.com/problems/sum-root-to-leaf-numbers |
| 173. 二叉搜索树迭代器 |
2 |
https://leetcode-cn.com/problems/binary-search-tree-iterator |
| 73. 矩阵置零 |
2 |
https://leetcode-cn.com/problems/set-matrix-zeroes |
| 补充题12. 二叉树的下一个节点 |
2 |
https://mp.weixin.qq.com/s/yewlHvHSilMsrUMFIO8WAA |
| 补充题6. 手撕堆排序 |
2 |
https://leetcode-cn.com/problems/sort-an-array |
| 148. 排序链表 |
2 |
https://leetcode-cn.com/problems/sort-list |
| 208. 实现 Trie (前缀树) |
2 |
https://leetcode-cn.com/problems/implement-trie-prefix-tree |
| 706. 设计哈希映射 |
2 |
https://leetcode-cn.com/problems/design-hashmap |
| 160. 相交链表 |
2 |
https://leetcode-cn.com/problems/intersection-of-two-linked-lists |
| 428. 序列化和反序列化 N 叉树 |
2 |
https://leetcode-cn.com/problems/serialize-and-deserialize-n-ary-tree |
| 64. 最小路径和 |
2 |
https://leetcode-cn.com/problems/minimum-path-sum |
| 116. 填充每个节点的下一个右侧节点指针 |
2 |
https://leetcode-cn.com/problems/populating-next-right-pointers-in-each-node |
| 105. 从前序与中序遍历序列构造二叉树 |
2 |
https://leetcode-cn.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal |
| 40. 组合总和 II |
2 |
https://leetcode-cn.com/problems/combination-sum-ii |
| 189. 旋转数组 |
2 |
https://leetcode-cn.com/problems/rotate-array |
| 84. 柱状图中最大的矩形 |
1 |
https://leetcode-cn.com/problems/largest-rectangle-in-histogram |
| 120. 三角形最小路径和 |
1 |
https://leetcode-cn.com/problems/triangle |
| 5. 最长回文子串 |
1 |
https://leetcode-cn.com/problems/longest-palindromic-substring |
| 867. 转置矩阵 |
1 |
https://leetcode-cn.com/problems/transpose-matrix |
| 78. 子集 |
1 |
https://leetcode-cn.com/problems/subsets |
| 907. 子数组的最小值之和 |
1 |
https://leetcode-cn.com/problems/sum-of-subarray-minimums |
| 1013. 将数组分成和相等的三个部分 |
1 |
https://leetcode-cn.com/problems/partition-array-into-three-parts-with-equal-sum |
| 572. 另一个树的子树 |
1 |
https://leetcode-cn.com/problems/subtree-of-another-tree |
| 704. 二分查找 |
1 |
https://leetcode-cn.com/problems/binary-search |
| 171. Excel表列序号 |
1 |
https://leetcode-cn.com/problems/excel-sheet-column-number |
| 150. 逆波兰表达式求值 |
1 |
https://leetcode-cn.com/problems/evaluate-reverse-polish-notation |
| 767. 重构字符串 |
1 |
https://leetcode-cn.com/problems/reorganize-string |
| 459. 重复的子字符串 |
1 |
https://leetcode-cn.com/problems/repeated-substring-pattern |
| 973. 最接近原点的 K 个点 |
1 |
https://leetcode-cn.com/problems/k-closest-points-to-origin |
| 剑指 Offer 21. 调整数组顺序使奇数位于偶数前面 |
1 |
https://leetcode-cn.com/problems/diao-zheng-shu-zu-shun-xu-shi-qi-shu-wei-yu-ou-shu-qian-mian-lcof |
| 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 |
| 887. 鸡蛋掉落 |
1 |
https://leetcode-cn.com/problems/super-egg-drop |
| 剑指 Offer 26. 树的子结构 |
1 |
https://leetcode-cn.com/problems/shu-de-zi-jie-gou-lcof |
| 328. 奇偶链表 |
1 |
https://leetcode-cn.com/problems/odd-even-linked-list |
| 137. 只出现一次的数字 II |
1 |
https://leetcode-cn.com/problems/single-number-ii |
| 155. 最小栈 |
1 |
https://leetcode-cn.com/problems/min-stack |
| 1375. 灯泡开关 III |
1 |
https://leetcode-cn.com/problems/bulb-switcher-iii |
| 662. 二叉树最大宽度 |
1 |
https://leetcode-cn.com/problems/maximum-width-of-binary-tree |
| 44. 通配符匹配 |
1 |
https://leetcode-cn.com/problems/wildcard-matching |
| 739. 每日温度 |
1 |
https://leetcode-cn.com/problems/daily-temperatures |
| 122. 买卖股票的最佳时机 II |
1 |
https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-ii |
| 20. 有效的括号 |
1 |
https://leetcode-cn.com/problems/valid-parentheses |
| 700. 二叉搜索树中的搜索 |
1 |
https://leetcode-cn.com/problems/search-in-a-binary-search-tree |
| 701. 二叉搜索树中的插入操作 |
1 |
https://leetcode-cn.com/problems/insert-into-a-binary-search-tree |
| 1312. 让字符串成为回文串的最少插入次数 |
1 |
https://leetcode-cn.com/problems/minimum-insertion-steps-to-make-a-string-palindrome |
| 139. 单词拆分 |
1 |
https://leetcode-cn.com/problems/word-break |
| 557. 反转字符串中的单词 III |
1 |
https://leetcode-cn.com/problems/reverse-words-in-a-string-iii |
| 60. 第k个排列 |
1 |
https://leetcode-cn.com/problems/permutation-sequence |
| 848. 字母移位 |
1 |
https://leetcode-cn.com/problems/shifting-letters |
| 569. 员工薪水中位数 |
1 |
https://leetcode-cn.com/problems/median-employee-salary |
| 88. 合并两个有序数组 |
1 |
https://leetcode-cn.com/problems/merge-sorted-array |
| 617. 合并二叉树 |
1 |
https://leetcode-cn.com/problems/merge-two-binary-trees |
| 349. 两个数组的交集 |
1 |
https://leetcode-cn.com/problems/intersection-of-two-arrays |
| 713. 乘积小于K的子数组 |
1 |
https://leetcode-cn.com/problems/subarray-product-less-than-k |
| 102. 二叉树的层序遍历 |
1 |
https://leetcode-cn.com/problems/binary-tree-level-order-traversal |
| 113. 路径总和 II |
1 |
https://leetcode-cn.com/problems/path-sum-ii |
| 692. 前K个高频单词 |
1 |
https://leetcode-cn.com/problems/top-k-frequent-words |
| 394. 字符串解码 |
1 |
https://leetcode-cn.com/problems/decode-string |
| 1155. 掷骰子的N种方法 |
1 |
https://leetcode-cn.com/problems/number-of-dice-rolls-with-target-sum |
| 694. 不同岛屿的数量 |
1 |
https://leetcode-cn.com/problems/number-of-distinct-islands |
| 1314. 矩阵区域和 |
1 |
https://leetcode-cn.com/problems/matrix-block-sum |
| 82. 删除排序链表中的重复元素 II |
1 |
https://leetcode-cn.com/problems/remove-duplicates-from-sorted-list-ii |
| 123. 买卖股票的最佳时机 III |
1 |
https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-iii |
| 114. 二叉树展开为链表 |
1 |
https://leetcode-cn.com/problems/flatten-binary-tree-to-linked-list |
| 104. 二叉树的最大深度 |
1 |
https://leetcode-cn.com/problems/maximum-depth-of-binary-tree |
| 407. 接雨水 II |
1 |
https://leetcode-cn.com/problems/trapping-rain-water-ii |
| 剑指 Offer 40. 最小的k个数 |
1 |
https://leetcode-cn.com/problems/zui-xiao-de-kge-shu-lcof |
| 347. 前 K 个高频元素 |
1 |
https://leetcode-cn.com/problems/top-k-frequent-elements |
| 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 |
| 29. 两数相除 |
1 |
https://leetcode-cn.com/problems/divide-two-integers |
| 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 |
| 386. 字典序排数 |
1 |
https://leetcode-cn.com/problems/lexicographical-numbers |
| 311. 稀疏矩阵的乘法 |
1 |
https://leetcode-cn.com/problems/sparse-matrix-multiplication |
| 166. 分数到小数 |
1 |
https://leetcode-cn.com/problems/fraction-to-recurring-decimal |
| 补充题14. 阿拉伯数字转中文数字 |
1 |
|
| 21. 合并两个有序链表 |
1 |
https://leetcode-cn.com/problems/merge-two-sorted-lists |
| 1358. 包含所有三种字符的子字符串数目 |
1 |
https://leetcode-cn.com/problems/number-of-substrings-containing-all-three-characters |
| 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 |
| 补充题17. 两个有序数组第k小的数 |
1 |
|
| 209. 长度最小的子数组 |
1 |
https://leetcode-cn.com/problems/minimum-size-subarray-sum |
| 227. 基本计算器 II |
1 |
https://leetcode-cn.com/problems/basic-calculator-ii |
| 470. 用 Rand7() 实现 Rand10() |
1 |
https://leetcode-cn.com/problems/implement-rand10-using-rand7 |
| 13. 罗马数字转整数 |
1 |
https://leetcode-cn.com/problems/roman-to-integer |
| 643. 子数组最大平均数 I |
1 |
https://leetcode-cn.com/problems/maximum-average-subarray-i |
| 871. 最低加油次数 |
1 |
https://leetcode-cn.com/problems/minimum-number-of-refueling-stops |
| 1615. 最大网络秩 |
1 |
https://leetcode-cn.com/problems/maximal-network-rank |
| 剑指 Offer 56 - II. 数组中数字出现的次数 II |
1 |
https://leetcode-cn.com/problems/shu-zu-zhong-shu-zi-chu-xian-de-ci-shu-ii-lcof |
| 1483. 树节点的第 K 个祖先 |
1 |
https://leetcode-cn.com/problems/kth-ancestor-of-a-tree-node |
| 1570. 两个稀疏向量的点积 |
1 |
https://leetcode-cn.com/problems/dot-product-of-two-sparse-vectors |
| 628. 三个数的最大乘积 |
1 |
https://leetcode-cn.com/problems/maximum-product-of-three-numbers |
| 145. 二叉树的后序遍历 |
1 |
https://leetcode-cn.com/problems/binary-tree-postorder-traversal |
| 46. 全排列 |
1 |
https://leetcode-cn.com/problems/permutations |
| 460. LFU缓存 |
1 |
https://leetcode-cn.com/problems/lfu-cache |
| 785. 判断二分图 |
1 |
https://leetcode-cn.com/problems/is-graph-bipartite |
| 718. 最长重复子数组 |
1 |
https://leetcode-cn.com/problems/maximum-length-of-repeated-subarray |
| 242. 有效的字母异位词 |
1 |
https://leetcode-cn.com/problems/valid-anagram |
| 307. 区域和检索 - 数组可修改 |
1 |
https://leetcode-cn.com/problems/range-sum-query-mutable |
| 442. 数组中重复的数据 |
1 |
https://leetcode-cn.com/problems/find-all-duplicates-in-an-array |
| 补充题13. 中文数字转阿拉伯数字 |
1 |
|
| 56. 合并区间 |
1 |
https://leetcode-cn.com/problems/merge-intervals |
| 17. 电话号码的字母组合 |
1 |
https://leetcode-cn.com/problems/letter-combinations-of-a-phone-number |
| 1143. 最长公共子序列 |
1 |
https://leetcode-cn.com/problems/longest-common-subsequence |
| 179. 最大数 |
1 |
https://leetcode-cn.com/problems/largest-number |
| 513. 找树左下角的值 |
1 |
https://leetcode-cn.com/problems/find-bottom-left-tree-value |
| 133. 克隆图 |
1 |
https://leetcode-cn.com/problems/clone-graph |
| 99. 恢复二叉搜索树 |
1 |
https://leetcode-cn.com/problems/recover-binary-search-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 |
| 168. Excel表列名称 |
1 |
https://leetcode-cn.com/problems/excel-sheet-column-title |
| 2. 两数相加 |
1 |
https://leetcode-cn.com/problems/add-two-numbers |
| 337. 打家劫舍 III |
1 |
https://leetcode-cn.com/problems/house-robber-iii |
| 518. 零钱兑换 II |
1 |
https://leetcode-cn.com/problems/coin-change-2 |
| 844. 比较含退格的字符串 |
1 |
https://leetcode-cn.com/problems/backspace-string-compare |
| 353. 贪吃蛇 |
1 |
https://leetcode-cn.com/problems/design-snake-game |
| 198. 打家劫舍 |
1 |
https://leetcode-cn.com/problems/house-robber |
| 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 |
| 70. 爬楼梯 |
1 |
https://leetcode-cn.com/problems/climbing-stairs |
| 面试题 17.24. 最大子矩阵 |
1 |
https://leetcode-cn.com/problems/max-submatrix-lcci |
| 268. 缺失数字 |
1 |
https://leetcode-cn.com/problems/missing-number |
| 1497. 检查数组对是否可以被 k 整除 |
1 |
https://leetcode-cn.com/problems/check-if-array-pairs-are-divisible-by-k |
| 239. 滑动窗口最大值 |
1 |
https://leetcode-cn.com/problems/sliding-window-maximum |
| 354. 俄罗斯套娃信封问题 |
1 |
https://leetcode-cn.com/problems/russian-doll-envelopes |
| 752. 打开转盘锁 |
1 |
https://leetcode-cn.com/problems/open-the-lock |
| 797. 所有可能的路径 |
1 |
https://leetcode-cn.com/problems/all-paths-from-source-to-target |
| 222. 完全二叉树的节点个数 |
1 |
https://leetcode-cn.com/problems/count-complete-tree-nodes |
| 322. 零钱兑换 |
1 |
https://leetcode-cn.com/problems/coin-change |
| 743. 网络延迟时间 |
1 |
https://leetcode-cn.com/problems/network-delay-time |
| 199. 二叉树的右视图 |
1 |
https://leetcode-cn.com/problems/binary-tree-right-side-view |
| 135. 分发糖果 |
1 |
https://leetcode-cn.com/problems/candy |
| 41. 缺失的第一个正数 |
1 |
https://leetcode-cn.com/problems/first-missing-positive |
| 剑指 Offer 15. 二进制中1的个数 |
1 |
https://leetcode-cn.com/problems/er-jin-zhi-zhong-1de-ge-shu-lcof |
| 剑指 Offer 22. 链表中倒数第k个节点 |
1 |
https://leetcode-cn.com/problems/lian-biao-zhong-dao-shu-di-kge-jie-dian-lcof |