测试 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 3. 无重复字符的最长子串 7 https://leetcode-cn.com/problems/longest-substring-without-repeating-characters 227. 基本计算器 II 3 https://leetcode-cn.com/problems/basic-calculator-ii 74. 搜索二维矩阵 3 https://leetcode-cn.com/problems/search-a-2d-matrix 100. 相同的树 3 https://leetcode-cn.com/problems/same-tree 153. 寻找旋转排序数组中的最小值 2 https://leetcode-cn.com/problems/find-minimum-in-rotated-sorted-array 补充题4. 手撕快速排序 2 https://leetcode-cn.com/problems/sort-an-array 20. 有效的括号 2 https://leetcode-cn.com/problems/valid-parentheses 1143. 最长公共子序列 2 https://leetcode-cn.com/problems/longest-common-subsequence 171. Excel表列序号 2 https://leetcode-cn.com/problems/excel-sheet-column-number 46. 全排列 1 https://leetcode-cn.com/problems/permutations 202. 快乐数 1 https://leetcode-cn.com/problems/happy-number 134. 加油站 1 https://leetcode-cn.com/problems/gas-station 470. 用 Rand7() 实现 Rand10() 1 https://leetcode-cn.com/problems/implement-rand10-using-rand7 121. 买卖股票的最佳时机 1 https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock 442. 数组中重复的数据 1 https://leetcode-cn.com/problems/find-all-duplicates-in-an-array 53. 最大子序和 1 https://leetcode-cn.com/problems/maximum-subarray 剑指 Offer 62. 圆圈中最后剩下的数字 1 https://leetcode-cn.com/problems/yuan-quan-zhong-zui-hou-sheng-xia-de-shu-zi-lcof 206. 反转链表 1 https://leetcode-cn.com/problems/reverse-linked-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 14. 最长公共前缀 1 https://leetcode-cn.com/problems/longest-common-prefix 55. 跳跃游戏 1 https://leetcode-cn.com/problems/jump-game 136. 只出现一次的数字 1 https://leetcode-cn.com/problems/single-number 821. 字符的最短距离 1 https://leetcode-cn.com/problems/shortest-distance-to-a-character 43. 字符串相乘 1 https://leetcode-cn.com/problems/multiply-strings 237. 删除链表中的节点 1 https://leetcode-cn.com/problems/delete-node-in-a-linked-list 217. 存在重复元素 1 https://leetcode-cn.com/problems/contains-duplicate 240. 搜索二维矩阵 II 1 https://leetcode-cn.com/problems/search-a-2d-matrix-ii