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 8 https://leetcode-cn.com/problems/longest-substring-without-repeating-characters 1. 两数之和 7 https://leetcode-cn.com/problems/two-sum 704. 二分查找 6 https://leetcode-cn.com/problems/binary-search 20. 有效的括号 6 https://leetcode-cn.com/problems/valid-parentheses 232. 用栈实现队列 5 https://leetcode-cn.com/problems/implement-queue-using-stacks 141. 环形链表 4 https://leetcode-cn.com/problems/linked-list-cycle 14. 最长公共前缀 4 https://leetcode-cn.com/problems/longest-common-prefix 46. 全排列 4 https://leetcode-cn.com/problems/permutations 7. 整数反转 4 https://leetcode-cn.com/problems/reverse-integer 53. 最大子序和 4 https://leetcode-cn.com/problems/maximum-subarray 136. 只出现一次的数字 4 https://leetcode-cn.com/problems/single-number 242. 有效的字母异位词 4 https://leetcode-cn.com/problems/valid-anagram 8. 字符串转换整数 (atoi) 4 https://leetcode-cn.com/problems/string-to-integer-atoi 151. 翻转字符串里的单词 3 https://leetcode-cn.com/problems/reverse-words-in-a-string 468. 验证IP地址 3 https://leetcode-cn.com/problems/validate-ip-address 补充题14. 阿拉伯数字转中文数字 3 剑指 Offer 53 - I. 在排序数组中查找数字 I 3 https://leetcode-cn.com/problems/zai-pai-xu-shu-zu-zhong-cha-zhao-shu-zi-lcof 169. 多数元素 3 https://leetcode-cn.com/problems/majority-element 补充题4. 手撕快速排序 3 https://leetcode-cn.com/problems/sort-an-array 128. 最长连续序列 2 https://leetcode-cn.com/problems/longest-consecutive-sequence 83. 删除排序链表中的重复元素 2 https://leetcode-cn.com/problems/remove-duplicates-from-sorted-list 21. 合并两个有序链表 2 https://leetcode-cn.com/problems/merge-two-sorted-lists 88. 合并两个有序数组 2 https://leetcode-cn.com/problems/merge-sorted-array 226. 翻转二叉树 2 https://leetcode-cn.com/problems/invert-binary-tree 剑指 Offer 21. 调整数组顺序使奇数位于偶数前面 2 https://leetcode-cn.com/problems/diao-zheng-shu-zu-shun-xu-shi-qi-shu-wei-yu-ou-shu-qian-mian-lcof 718. 最长重复子数组 2 https://leetcode-cn.com/problems/maximum-length-of-repeated-subarray 76. 最小覆盖子串 2 https://leetcode-cn.com/problems/minimum-window-substring 239. 滑动窗口最大值 2 https://leetcode-cn.com/problems/sliding-window-maximum 剑指 Offer 57 - II. 和为s的连续正数序列 2 https://leetcode-cn.com/problems/he-wei-sde-lian-xu-zheng-shu-xu-lie-lcof 165. 比较版本号 2 https://leetcode-cn.com/problems/compare-version-numbers 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 876. 链表的中间结点 1 https://leetcode-cn.com/problems/middle-of-the-linked-list 70. 爬楼梯 1 https://leetcode-cn.com/problems/climbing-stairs 796. 旋转字符串 1 https://leetcode-cn.com/problems/rotate-string 72. 编辑距离 1 https://leetcode-cn.com/problems/edit-distance 460. LFU缓存 1 https://leetcode-cn.com/problems/lfu-cache 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 231. 2的幂 1 https://leetcode-cn.com/problems/power-of-two 415. 字符串相加 1 https://leetcode-cn.com/problems/add-strings 50. Pow(x, n) 1 https://leetcode-cn.com/problems/powx-n 40. 组合总和 II 1 https://leetcode-cn.com/problems/combination-sum-ii 628. 三个数的最大乘积 1 https://leetcode-cn.com/problems/maximum-product-of-three-numbers 215. 数组中的第K个最大元素 1 https://leetcode-cn.com/problems/kth-largest-element-in-an-array 剑指 Offer 61. 扑克牌中的顺子 1 https://leetcode-cn.com/problems/bu-ke-pai-zhong-de-shun-zi-lcof 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 240. 搜索二维矩阵 II 1 https://leetcode-cn.com/problems/search-a-2d-matrix-ii 23. 合并K个排序链表 1 https://leetcode-cn.com/problems/merge-k-sorted-lists 9. 回文数 1 https://leetcode-cn.com/problems/palindrome-number 剑指 Offer 10- I. 斐波那契数列 1 https://leetcode-cn.com/problems/fei-bo-na-qi-shu-lie-lcof 26. 删除排序数组中的重复项 1 https://leetcode-cn.com/problems/remove-duplicates-from-sorted-array 283. 移动零 1 https://leetcode-cn.com/problems/move-zeroes 34. 在排序数组中查找元素的第一个和最后一个位置 1 https://leetcode-cn.com/problems/find-first-and-last-position-of-element-in-sorted-array 125. 验证回文串 1 https://leetcode-cn.com/problems/valid-palindrome 28. 实现 strStr() 1 https://leetcode-cn.com/problems/implement-strstr 206. 反转链表 1 https://leetcode-cn.com/problems/reverse-linked-list 101. 对称二叉树 1 https://leetcode-cn.com/problems/symmetric-tree 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 32. 最长有效括号 1 https://leetcode-cn.com/problems/longest-valid-parentheses 15. 三数之和 1 https://leetcode-cn.com/problems/3sum