客户端 若想按部门/难度/题型筛选题目，请进入CodeTop查询 题目 出现次数 链接 1. 两数之和 4 https://leetcode-cn.com/problems/two-sum 剑指 Offer 54. 二叉搜索树的第k大节点 3 https://leetcode-cn.com/problems/er-cha-sou-suo-shu-de-di-kda-jie-dian-lcof 300. 最长上升子序列 3 https://leetcode-cn.com/problems/longest-increasing-subsequence 21. 合并两个有序链表 3 https://leetcode-cn.com/problems/merge-two-sorted-lists 206. 反转链表 3 https://leetcode-cn.com/problems/reverse-linked-list 415. 字符串相加 3 https://leetcode-cn.com/problems/add-strings 141. 环形链表 2 https://leetcode-cn.com/problems/linked-list-cycle 227. 基本计算器 II 2 https://leetcode-cn.com/problems/basic-calculator-ii 215. 数组中的第K个最大元素 2 https://leetcode-cn.com/problems/kth-largest-element-in-an-array 704. 二分查找 2 https://leetcode-cn.com/problems/binary-search 151. 翻转字符串里的单词 2 https://leetcode-cn.com/problems/reverse-words-in-a-string 1143. 最长公共子序列 2 https://leetcode-cn.com/problems/longest-common-subsequence 234. 回文链表 2 https://leetcode-cn.com/problems/palindrome-linked-list 补充题4. 手撕快速排序 2 https://leetcode-cn.com/problems/sort-an-array 678. 有效的括号字符串 2 https://leetcode-cn.com/problems/valid-parenthesis-string 4. 寻找两个正序数组的中位数 2 https://leetcode-cn.com/problems/median-of-two-sorted-arrays 62. 不同路径 2 https://leetcode-cn.com/problems/unique-paths 125. 验证回文串 2 https://leetcode-cn.com/problems/valid-palindrome 补充题19. 判断一个点是否在三角形内 1 https://mp.weixin.qq.com/s/qnVUJq4lmnLsXJgyHCXngA 31. 下一个排列 1 https://leetcode-cn.com/problems/next-permutation 160. 相交链表 1 https://leetcode-cn.com/problems/intersection-of-two-linked-lists 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 16. 最接近的三数之和 1 https://leetcode-cn.com/problems/3sum-closest 287. 寻找重复数 1 https://leetcode-cn.com/problems/find-the-duplicate-number 405. 数字转换为十六进制数 1 https://leetcode-cn.com/problems/convert-a-number-to-hexadecimal 207. 课程表 1 https://leetcode-cn.com/problems/course-schedule 补充题6. 手撕堆排序 1 https://leetcode-cn.com/problems/sort-an-array 104. 二叉树的最大深度 1 https://leetcode-cn.com/problems/maximum-depth-of-binary-tree 200. 岛屿数量 1 https://leetcode-cn.com/problems/number-of-islands 45. 跳跃游戏 II 1 https://leetcode-cn.com/problems/jump-game-ii 剑指 Offer 41. 数据流中的中位数 1 https://leetcode-cn.com/problems/shu-ju-liu-zhong-de-zhong-wei-shu-lcof 718. 最长重复子数组 1 https://leetcode-cn.com/problems/maximum-length-of-repeated-subarray 10. 正则表达式匹配 1 https://leetcode-cn.com/problems/regular-expression-matching 53. 最大子序和 1 https://leetcode-cn.com/problems/maximum-subarray 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 470. 用 Rand7() 实现 Rand10() 1 https://leetcode-cn.com/problems/implement-rand10-using-rand7 20. 有效的括号 1 https://leetcode-cn.com/problems/valid-parentheses 498. 对角线遍历 1 https://leetcode-cn.com/problems/diagonal-traverse 179. 最大数 1 https://leetcode-cn.com/problems/largest-number 236. 二叉树的最近公共祖先 1 https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-tree 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 128. 最长连续序列 1 https://leetcode-cn.com/problems/longest-consecutive-sequence 43. 字符串相乘 1 https://leetcode-cn.com/problems/multiply-strings 171. Excel表列序号 1 https://leetcode-cn.com/problems/excel-sheet-column-number 876. 链表的中间结点 1 https://leetcode-cn.com/problems/middle-of-the-linked-list 2. 两数相加 1 https://leetcode-cn.com/problems/add-two-numbers 59. 螺旋矩阵 II 1 https://leetcode-cn.com/problems/spiral-matrix-ii 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 169. 多数元素 1 https://leetcode-cn.com/problems/majority-element 384. 打乱数组 1 https://leetcode-cn.com/problems/shuffle-an-array 442. 数组中重复的数据 1 https://leetcode-cn.com/problems/find-all-duplicates-in-an-array 144. 二叉树的前序遍历 1 https://leetcode-cn.com/problems/binary-tree-preorder-traversal 692. 前K个高频单词 1 https://leetcode-cn.com/problems/top-k-frequent-words 167. 两数之和 II - 输入有序数组 1 https://leetcode-cn.com/problems/two-sum-ii-input-array-is-sorted 459. 重复的子字符串 1 https://leetcode-cn.com/problems/repeated-substring-pattern 26. 删除排序数组中的重复项 1 https://leetcode-cn.com/problems/remove-duplicates-from-sorted-array 120. 三角形最小路径和 1 https://leetcode-cn.com/problems/triangle 7. 整数反转 1 https://leetcode-cn.com/problems/reverse-integer 54. 螺旋矩阵 1 https://leetcode-cn.com/problems/spiral-matrix 232. 用栈实现队列 1 https://leetcode-cn.com/problems/implement-queue-using-stacks 155. 最小栈 1 https://leetcode-cn.com/problems/min-stack 23. 合并K个排序链表 1 https://leetcode-cn.com/problems/merge-k-sorted-lists 剑指 Offer 10- I. 斐波那契数列 1 https://leetcode-cn.com/problems/fei-bo-na-qi-shu-lie-lcof 887. 鸡蛋掉落 1 https://leetcode-cn.com/problems/super-egg-drop