前端 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 补充题4. 手撕快速排序 7 https://leetcode-cn.com/problems/sort-an-array 70. 爬楼梯 4 https://leetcode-cn.com/problems/climbing-stairs 88. 合并两个有序数组 4 https://leetcode-cn.com/problems/merge-sorted-array 剑指 Offer 10- I. 斐波那契数列 4 https://leetcode-cn.com/problems/fei-bo-na-qi-shu-lie-lcof 104. 二叉树的最大深度 3 https://leetcode-cn.com/problems/maximum-depth-of-binary-tree 300. 最长上升子序列 3 https://leetcode-cn.com/problems/longest-increasing-subsequence 20. 有效的括号 2 https://leetcode-cn.com/problems/valid-parentheses 415. 字符串相加 2 https://leetcode-cn.com/problems/add-strings 46. 全排列 2 https://leetcode-cn.com/problems/permutations 1047. 删除字符串中的所有相邻重复项 2 https://leetcode-cn.com/problems/remove-all-adjacent-duplicates-in-string 498. 对角线遍历 2 https://leetcode-cn.com/problems/diagonal-traverse 322. 零钱兑换 2 https://leetcode-cn.com/problems/coin-change 48. 旋转图像 2 https://leetcode-cn.com/problems/rotate-image 136. 只出现一次的数字 2 https://leetcode-cn.com/problems/single-number 54. 螺旋矩阵 1 https://leetcode-cn.com/problems/spiral-matrix 141. 环形链表 1 https://leetcode-cn.com/problems/linked-list-cycle 654. 最大二叉树 1 https://leetcode-cn.com/problems/maximum-binary-tree 704. 二分查找 1 https://leetcode-cn.com/problems/binary-search 557. 反转字符串中的单词 III 1 https://leetcode-cn.com/problems/reverse-words-in-a-string-iii 102. 二叉树的层序遍历 1 https://leetcode-cn.com/problems/binary-tree-level-order-traversal 21. 合并两个有序链表 1 https://leetcode-cn.com/problems/merge-two-sorted-lists 206. 反转链表 1 https://leetcode-cn.com/problems/reverse-linked-list 199. 二叉树的右视图 1 https://leetcode-cn.com/problems/binary-tree-right-side-view 42. 接雨水 1 https://leetcode-cn.com/problems/trapping-rain-water 64. 最小路径和 1 https://leetcode-cn.com/problems/minimum-path-sum 补充题5. 手撕归并排序 1 https://leetcode-cn.com/problems/sort-an-array 50. Pow(x, n) 1 https://leetcode-cn.com/problems/powx-n 172. 阶乘后的零 1 https://leetcode-cn.com/problems/factorial-trailing-zeroes 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 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 剑指 Offer 10- II. 青蛙跳台阶问题 1 https://leetcode-cn.com/problems/qing-wa-tiao-tai-jie-wen-ti-lcof 6. Z 字形变换 1 https://leetcode-cn.com/problems/zigzag-conversion 63. 不同路径 II 1 https://leetcode-cn.com/problems/unique-paths-ii 384. 打乱数组 1 https://leetcode-cn.com/problems/shuffle-an-array 14. 最长公共前缀 1 https://leetcode-cn.com/problems/longest-common-prefix 15. 三数之和 1 https://leetcode-cn.com/problems/3sum 260. 只出现一次的数字 III 1 https://leetcode-cn.com/problems/single-number-iii 补充题19. 判断一个点是否在三角形内 1 https://mp.weixin.qq.com/s/qnVUJq4lmnLsXJgyHCXngA 1. 两数之和 1 https://leetcode-cn.com/problems/two-sum 718. 最长重复子数组 1 https://leetcode-cn.com/problems/maximum-length-of-repeated-subarray 59. 螺旋矩阵 II 1 https://leetcode-cn.com/problems/spiral-matrix-ii 53. 最大子序和 1 https://leetcode-cn.com/problems/maximum-subarray 283. 移动零 1 https://leetcode-cn.com/problems/move-zeroes 1518. 换酒问题 1 https://leetcode-cn.com/problems/water-bottles 78. 子集 1 https://leetcode-cn.com/problems/subsets