| 25. K 个一组翻转链表 |
15 |
https://leetcode-cn.com/problems/reverse-nodes-in-k-group |
| 215. 数组中的第K个最大元素 |
15 |
https://leetcode-cn.com/problems/kth-largest-element-in-an-array |
| 3. 无重复字符的最长子串 |
14 |
https://leetcode-cn.com/problems/longest-substring-without-repeating-characters |
| 103. 二叉树的锯齿形层次遍历 |
13 |
https://leetcode-cn.com/problems/binary-tree-zigzag-level-order-traversal |
| 160. 相交链表 |
12 |
https://leetcode-cn.com/problems/intersection-of-two-linked-lists |
| 56. 合并区间 |
10 |
https://leetcode-cn.com/problems/merge-intervals |
| 88. 合并两个有序数组 |
9 |
https://leetcode-cn.com/problems/merge-sorted-array |
| 206. 反转链表 |
8 |
https://leetcode-cn.com/problems/reverse-linked-list |
| 200. 岛屿数量 |
8 |
https://leetcode-cn.com/problems/number-of-islands |
| 5. 最长回文子串 |
8 |
https://leetcode-cn.com/problems/longest-palindromic-substring |
| 1. 两数之和 |
8 |
https://leetcode-cn.com/problems/two-sum |
| 300. 最长上升子序列 |
7 |
https://leetcode-cn.com/problems/longest-increasing-subsequence |
| 15. 三数之和 |
7 |
https://leetcode-cn.com/problems/3sum |
| 剑指 Offer 22. 链表中倒数第k个节点 |
7 |
https://leetcode-cn.com/problems/lian-biao-zhong-dao-shu-di-kge-jie-dian-lcof |
| 21. 合并两个有序链表 |
7 |
https://leetcode-cn.com/problems/merge-two-sorted-lists |
| 补充题4. 手撕快速排序 |
7 |
https://leetcode-cn.com/problems/undefined |
| 121. 买卖股票的最佳时机 |
6 |
https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock |
| 83. 删除排序链表中的重复元素 |
6 |
https://leetcode-cn.com/problems/remove-duplicates-from-sorted-list |
| 141. 环形链表 |
6 |
https://leetcode-cn.com/problems/linked-list-cycle |
| 33. 搜索旋转排序数组 |
6 |
https://leetcode-cn.com/problems/search-in-rotated-sorted-array |
| 112. 路径总和 |
6 |
https://leetcode-cn.com/problems/path-sum |
| 958. 二叉树的完全性检验 |
5 |
https://leetcode-cn.com/problems/check-completeness-of-a-binary-tree |
| 101. 对称二叉树 |
5 |
https://leetcode-cn.com/problems/symmetric-tree |
| 补充题1. 排序奇升偶降链表 |
5 |
https://leetcode-cn.com/problems/undefined |
| 146. LRU缓存机制 |
5 |
https://leetcode-cn.com/problems/lru-cache |
| 54. 螺旋矩阵 |
5 |
https://leetcode-cn.com/problems/spiral-matrix |
| 142. 环形链表 II |
5 |
https://leetcode-cn.com/problems/linked-list-cycle-ii |
| 94. 二叉树的中序遍历 |
5 |
https://leetcode-cn.com/problems/binary-tree-inorder-traversal |
| 23. 合并K个排序链表 |
5 |
https://leetcode-cn.com/problems/merge-k-sorted-lists |
| 102. 二叉树的层序遍历 |
5 |
https://leetcode-cn.com/problems/binary-tree-level-order-traversal |
| 470. 用 Rand7() 实现 Rand10() |
5 |
https://leetcode-cn.com/problems/implement-rand10-using-rand7 |
| 124. 二叉树中的最大路径和 |
5 |
https://leetcode-cn.com/problems/binary-tree-maximum-path-sum |
| 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 |
| 236. 二叉树的最近公共祖先 |
5 |
https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-tree |
| 70. 爬楼梯 |
4 |
https://leetcode-cn.com/problems/climbing-stairs |
| 169. 多数元素 |
4 |
https://leetcode-cn.com/problems/majority-element |
| 143. 重排链表 |
4 |
https://leetcode-cn.com/problems/reorder-list |
| 240. 搜索二维矩阵 II |
4 |
https://leetcode-cn.com/problems/search-a-2d-matrix-ii |
| 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 |
| 165. 比较版本号 |
4 |
https://leetcode-cn.com/problems/compare-version-numbers |
| 232. 用栈实现队列 |
4 |
https://leetcode-cn.com/problems/implement-queue-using-stacks |
| 22. 括号生成 |
4 |
https://leetcode-cn.com/problems/generate-parentheses |
| 92. 反转链表 II |
4 |
https://leetcode-cn.com/problems/reverse-linked-list-ii |
| 98. 验证二叉搜索树 |
4 |
https://leetcode-cn.com/problems/validate-binary-search-tree |
| 46. 全排列 |
4 |
https://leetcode-cn.com/problems/permutations |
| 718. 最长重复子数组 |
4 |
https://leetcode-cn.com/problems/maximum-length-of-repeated-subarray |
| 69. x 的平方根 |
4 |
https://leetcode-cn.com/problems/sqrtx |
| 122. 买卖股票的最佳时机 II |
3 |
https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-ii |
| 39. 组合总和 |
3 |
https://leetcode-cn.com/problems/combination-sum |
| 113. 路径总和 II |
3 |
https://leetcode-cn.com/problems/path-sum-ii |
| 32. 最长有效括号 |
3 |
https://leetcode-cn.com/problems/longest-valid-parentheses |
| 224. 基本计算器 |
3 |
https://leetcode-cn.com/problems/basic-calculator |
| 226. 翻转二叉树 |
3 |
https://leetcode-cn.com/problems/invert-binary-tree |
| 20. 有效的括号 |
3 |
https://leetcode-cn.com/problems/valid-parentheses |
| 53. 最大子序和 |
3 |
https://leetcode-cn.com/problems/maximum-subarray |
| 64. 最小路径和 |
3 |
https://leetcode-cn.com/problems/minimum-path-sum |
| 42. 接雨水 |
3 |
https://leetcode-cn.com/problems/trapping-rain-water |
| 199. 二叉树的右视图 |
3 |
https://leetcode-cn.com/problems/binary-tree-right-side-view |
| 补充题9. 36进制加法 |
3 |
https://leetcode-cn.com/problems/undefined |
| 72. 编辑距离 |
3 |
https://leetcode-cn.com/problems/edit-distance |
| 138. 复制带随机指针的链表 |
3 |
https://leetcode-cn.com/problems/copy-list-with-random-pointer |
| 415. 字符串相加 |
3 |
https://leetcode-cn.com/problems/add-strings |
| 227. 基本计算器 II |
3 |
https://leetcode-cn.com/problems/basic-calculator-ii |
| 129. 求根到叶子节点数字之和 |
3 |
https://leetcode-cn.com/problems/sum-root-to-leaf-numbers |
| 补充题2. 圆环回原点问题 |
3 |
https://leetcode-cn.com/problems/undefined |
| 75. 颜色分类 |
2 |
https://leetcode-cn.com/problems/sort-colors |
| 41. 缺失的第一个正数 |
2 |
https://leetcode-cn.com/problems/first-missing-positive |
| 剑指 Offer 36. 二叉搜索树与双向链表 |
2 |
https://leetcode-cn.com/problems/er-cha-sou-suo-shu-yu-shuang-xiang-lian-biao-lcof |
| 26. 删除排序数组中的重复项 |
2 |
https://leetcode-cn.com/problems/remove-duplicates-from-sorted-array |
| 76. 最小覆盖子串 |
2 |
https://leetcode-cn.com/problems/minimum-window-substring |
| 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 |
| 225. 用队列实现栈 |
2 |
https://leetcode-cn.com/problems/implement-stack-using-queues |
| 647. 回文子串 |
2 |
https://leetcode-cn.com/problems/palindromic-substrings |
| 剑指 Offer 27. 二叉树的镜像 |
2 |
https://leetcode-cn.com/problems/er-cha-shu-de-jing-xiang-lcof |
| 4. 寻找两个正序数组的中位数 |
2 |
https://leetcode-cn.com/problems/median-of-two-sorted-arrays |
| 209. 长度最小的子数组 |
2 |
https://leetcode-cn.com/problems/minimum-size-subarray-sum |
| 剑指 Offer 54. 二叉搜索树的第k大节点 |
2 |
https://leetcode-cn.com/problems/er-cha-sou-suo-shu-de-di-kda-jie-dian-lcof |
| 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 |
| 剑指 Offer 10- I. 斐波那契数列 |
2 |
https://leetcode-cn.com/problems/fei-bo-na-qi-shu-lie-lcof |
| 125. 验证回文串 |
2 |
https://leetcode-cn.com/problems/valid-palindrome |
| 680. 验证回文字符串 Ⅱ |
2 |
https://leetcode-cn.com/problems/valid-palindrome-ii |
| 110. 平衡二叉树 |
2 |
https://leetcode-cn.com/problems/balanced-binary-tree |
| 补充题5. 手撕归并排序 |
2 |
https://leetcode-cn.com/problems/undefined |
| 148. 排序链表 |
2 |
https://leetcode-cn.com/problems/sort-list |
| 151. 翻转字符串里的单词 |
2 |
https://leetcode-cn.com/problems/reverse-words-in-a-string |
| 108. 将有序数组转换为二叉搜索树 |
2 |
https://leetcode-cn.com/problems/convert-sorted-array-to-binary-search-tree |
| 补充题6. 手撕堆排序 |
2 |
https://leetcode-cn.com/problems/undefined |
| 862. 和至少为 K 的最短子数组 |
2 |
https://leetcode-cn.com/problems/shortest-subarray-with-sum-at-least-k |
| 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 |
| 8. 字符串转换整数 (atoi) |
2 |
https://leetcode-cn.com/problems/string-to-integer-atoi |
| 2. 两数相加 |
2 |
https://leetcode-cn.com/problems/add-two-numbers |
| 补充题14. 阿拉伯数字转中文数字 |
2 |
https://leetcode-cn.com/problems/undefined |
| 48. 旋转图像 |
2 |
https://leetcode-cn.com/problems/rotate-image |
| 155. 最小栈 |
2 |
https://leetcode-cn.com/problems/min-stack |
| 61. 旋转链表 |
2 |
https://leetcode-cn.com/problems/rotate-list |
| 468. 验证IP地址 |
2 |
https://leetcode-cn.com/problems/validate-ip-address |
| 297. 二叉树的序列化与反序列化 |
2 |
https://leetcode-cn.com/problems/serialize-and-deserialize-binary-tree |
| 补充题3. 求区间最小数乘区间和的最大值 |
2 |
https://leetcode-cn.com/problems/undefined |
| 349. 两个数组的交集 |
2 |
https://leetcode-cn.com/problems/intersection-of-two-arrays |
| 695. 岛屿的最大面积 |
2 |
https://leetcode-cn.com/problems/max-area-of-island |
| 11. 盛最多水的容器 |
2 |
https://leetcode-cn.com/problems/container-with-most-water |
| 739. 每日温度 |
2 |
https://leetcode-cn.com/problems/daily-temperatures |
| 78. 子集 |
2 |
https://leetcode-cn.com/problems/subsets |
| 23. 合并K个升序链表 |
2 |
https://leetcode-cn.com/problems/merge-k-sorted-lists |
| 287. 寻找重复数 |
1 |
https://leetcode-cn.com/problems/find-the-duplicate-number |
| 572. 另一个树的子树 |
1 |
https://leetcode-cn.com/problems/subtree-of-another-tree |
| 977. 有序数组的平方 |
1 |
https://leetcode-cn.com/problems/squares-of-a-sorted-array |
| 974. 和可被 K 整除的子数组 |
1 |
https://leetcode-cn.com/problems/subarray-sums-divisible-by-k |
| 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 |
| 59. 螺旋矩阵 II |
1 |
https://leetcode-cn.com/problems/spiral-matrix-ii |
| 1438. 绝对差不超过限制的最长连续子数组 |
1 |
https://leetcode-cn.com/problems/longest-continuous-subarray-with-absolute-diff-less-than-or-equal-to-limit |
| 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 |
| 836. 矩形重叠 |
1 |
https://leetcode-cn.com/problems/rectangle-overlap |
| 91. 解码方法 |
1 |
https://leetcode-cn.com/problems/decode-ways |
| 179. 最大数 |
1 |
https://leetcode-cn.com/problems/largest-number |
| 剑指 Offer 17. 打印从1到最大的n位数 |
1 |
https://leetcode-cn.com/problems/da-yin-cong-1dao-zui-da-de-nwei-shu-lcof |
| 剑指 Offer 46. 把数字翻译成字符串 |
1 |
https://leetcode-cn.com/problems/ba-shu-zi-fan-yi-cheng-zi-fu-chuan-lcof |
| 60. 排列序列 |
1 |
https://leetcode-cn.com/problems/permutation-sequence |
| 104. 二叉树的最大深度 |
1 |
https://leetcode-cn.com/problems/maximum-depth-of-binary-tree |
| 面试题 17.24. 最大子矩阵 |
1 |
https://leetcode-cn.com/problems/max-submatrix-lcci |
| 547. 省份数量（原朋友圈） |
1 |
https://leetcode-cn.com/problems/friend-circles |
| 剑指 Offer 51. 数组中的逆序对 |
1 |
https://leetcode-cn.com/problems/shu-zu-zhong-de-ni-xu-dui-lcof |
| 补充题10. 36进制减法 |
1 |
https://leetcode-cn.com/problems/undefined |
| 198. 打家劫舍 |
1 |
https://leetcode-cn.com/problems/house-robber |
| 543. 二叉树的直径 |
1 |
https://leetcode-cn.com/problems/diameter-of-binary-tree |
| 460. LFU缓存 |
1 |
https://leetcode-cn.com/problems/lfu-cache |
| 1302. 层数最深叶子节点的和 |
1 |
https://leetcode-cn.com/problems/deepest-leaves-sum |
| 189. 旋转数组 |
1 |
https://leetcode-cn.com/problems/rotate-array |
| 361. 轰炸敌人 |
1 |
https://leetcode-cn.com/problems/bomb-enemy |
| 704. 二分查找 |
1 |
https://leetcode-cn.com/problems/binary-search |
| 127. 单词接龙 |
1 |
https://leetcode-cn.com/problems/word-ladder |
| 96. 不同的二叉搜索树 |
1 |
https://leetcode-cn.com/problems/unique-binary-search-trees |
| 16. 最接近的三数之和 |
1 |
https://leetcode-cn.com/problems/3sum-closest |
| 10. 正则表达式匹配 |
1 |
https://leetcode-cn.com/problems/regular-expression-matching |
| 120. 三角形最小路径和 |
1 |
https://leetcode-cn.com/problems/triangle |
| 239. 滑动窗口最大值 |
1 |
https://leetcode-cn.com/problems/sliding-window-maximum |
| 129. 求根节点到叶节点数字之和 |
1 |
https://leetcode-cn.com/problems/sum-root-to-leaf-numbers |
| 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 |
| 剑指 Offer 55 - I. 二叉树的深度 |
1 |
https://leetcode-cn.com/problems/er-cha-shu-de-shen-du-lcof |
| 面试题 08.05. 递归乘法 |
1 |
https://leetcode-cn.com/problems/recursive-mulitply-lcci |
| 670. 最大交换 |
1 |
https://leetcode-cn.com/problems/maximum-swap |
| 93. 复原IP地址 |
1 |
https://leetcode-cn.com/problems/restore-ip-addresses |
| 405. 数字转换为十六进制数 |
1 |
https://leetcode-cn.com/problems/convert-a-number-to-hexadecimal |
| 1420. 生成数组 |
1 |
https://leetcode-cn.com/problems/build-array-where-you-can-find-the-maximum-exactly-k-comparisons |
| 14. 最长公共前缀 |
1 |
https://leetcode-cn.com/problems/longest-common-prefix |
| 429. N 叉树的层序遍历 |
1 |
https://leetcode-cn.com/problems/n-ary-tree-level-order-traversal |
| 93. 复原 IP 地址 |
1 |
https://leetcode-cn.com/problems/restore-ip-addresses |
| 136. 只出现一次的数字 |
1 |
https://leetcode-cn.com/problems/single-number |
| 394. 字符串解码 |
1 |
https://leetcode-cn.com/problems/decode-string |
| 18. 四数之和 |
1 |
https://leetcode-cn.com/problems/4sum |
| 329. 矩阵中的最长递增路径 |
1 |
https://leetcode-cn.com/problems/longest-increasing-path-in-a-matrix |
| 191. 位1的个数 |
1 |
https://leetcode-cn.com/problems/number-of-1-bits |
| 887. 鸡蛋掉落 |
1 |
https://leetcode-cn.com/problems/super-egg-drop |
| 剑指 Offer 11. 旋转数组的最小数字 |
1 |
https://leetcode-cn.com/problems/xuan-zhuan-shu-zu-de-zui-xiao-shu-zi-lcof |
| 153. 寻找旋转排序数组中的最小值 |
1 |
https://leetcode-cn.com/problems/find-minimum-in-rotated-sorted-array |
| 611. 有效三角形的个数 |
1 |
https://leetcode-cn.com/problems/valid-triangle-number |
| 剑指 Offer 03. 数组中重复的数字 |
1 |
https://leetcode-cn.com/problems/shu-zu-zhong-zhong-fu-de-shu-zi-lcof |
| 62. 不同路径 |
1 |
https://leetcode-cn.com/problems/unique-paths |
| 322. 零钱兑换 |
1 |
https://leetcode-cn.com/problems/coin-change |
| 31. 下一个排列 |
1 |
https://leetcode-cn.com/problems/next-permutation |
| 765. 情侣牵手 |
1 |
https://leetcode-cn.com/problems/couples-holding-hands |
| 77. 组合 |
1 |
https://leetcode-cn.com/problems/combinations |
| 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 |
| 19. 删除链表的倒数第N个节点 |
1 |
https://leetcode-cn.com/problems/remove-nth-node-from-end-of-list |
| 106. 从中序与后序遍历序列构造二叉树 |
1 |
https://leetcode-cn.com/problems/construct-binary-tree-from-inorder-and-postorder-traversal |
| 剑指 Offer 33. 二叉搜索树的后序遍历序列 |
1 |
https://leetcode-cn.com/problems/er-cha-sou-suo-shu-de-hou-xu-bian-li-xu-lie-lcof |
| 498. 对角线遍历 |
1 |
https://leetcode-cn.com/problems/diagonal-traverse |
| 剑指 Offer 38. 字符串的排列 |
1 |
https://leetcode-cn.com/problems/zi-fu-chuan-de-pai-lie-lcof |
| 103. 二叉树的锯齿形层序遍历 |
1 |
https://leetcode-cn.com/problems/binary-tree-zigzag-level-order-traversal |
| 402. 移掉K位数字 |
1 |
https://leetcode-cn.com/problems/remove-k-digits |
| 334. 递增的三元子序列 |
1 |
https://leetcode-cn.com/problems/increasing-triplet-subsequence |
| 19. 删除链表的倒数第 N 个结点 |
1 |
https://leetcode-cn.com/problems/remove-nth-node-from-end-of-list |
| 429. N叉树的层序遍历 |
1 |
https://leetcode-cn.com/problems/n-ary-tree-level-order-traversal |
| 213. 打家劫舍 II |
1 |
https://leetcode-cn.com/problems/house-robber-ii |
| 剑指 Offer 45. 把数组排成最小的数 |
1 |
https://leetcode-cn.com/problems/ba-shu-zu-pai-cheng-zui-xiao-de-shu-lcof |
| 347. 前 K 个高频元素 |
1 |
https://leetcode-cn.com/problems/top-k-frequent-elements |
| 416. 分割等和子集 |
1 |
https://leetcode-cn.com/problems/partition-equal-subset-sum |
| 207. 课程表 |
1 |
https://leetcode-cn.com/problems/course-schedule |
| 871. 最低加油次数 |
1 |
https://leetcode-cn.com/problems/minimum-number-of-refueling-stops |
| 763. 划分字母区间 |
1 |
https://leetcode-cn.com/problems/partition-labels |
| 162. 寻找峰值 |
1 |
https://leetcode-cn.com/problems/find-peak-element |
| 556. 下一个更大元素 III |
1 |
https://leetcode-cn.com/problems/next-greater-element-iii |
| 662. 二叉树最大宽度 |
1 |
https://leetcode-cn.com/problems/maximum-width-of-binary-tree |
| 617. 合并二叉树 |
1 |
https://leetcode-cn.com/problems/merge-two-binary-trees |
