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 415. 字符串相加 14 https://leetcode-cn.com/problems/add-strings 1. 两数之和 4 https://leetcode-cn.com/problems/two-sum 704. 二分查找 4 https://leetcode-cn.com/problems/binary-search 198. 打家劫舍 4 https://leetcode-cn.com/problems/house-robber 165. 比较版本号 3 https://leetcode-cn.com/problems/compare-version-numbers 215. 数组中的第K个最大元素 3 https://leetcode-cn.com/problems/kth-largest-element-in-an-array 补充题22. IP地址与整数的转换 3 https://mp.weixin.qq.com/s/u-RahFTB3JIqND41HqtotQ 384. 打乱数组 3 https://leetcode-cn.com/problems/shuffle-an-array 22. 括号生成 3 https://leetcode-cn.com/problems/generate-parentheses 70. 爬楼梯 2 https://leetcode-cn.com/problems/climbing-stairs 121. 买卖股票的最佳时机 2 https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock 146. LRU缓存机制 2 https://leetcode-cn.com/problems/lru-cache 206. 反转链表 2 https://leetcode-cn.com/problems/reverse-linked-list 21. 合并两个有序链表 2 https://leetcode-cn.com/problems/merge-two-sorted-lists 8. 字符串转换整数 (atoi) 2 https://leetcode-cn.com/problems/string-to-integer-atoi 543. 二叉树的直径 2 https://leetcode-cn.com/problems/diameter-of-binary-tree 剑指 Offer 29. 顺时针打印矩阵 2 https://leetcode-cn.com/problems/shun-shi-zhen-da-yin-ju-zhen-lcof 20. 有效的括号 2 https://leetcode-cn.com/problems/valid-parentheses 88. 合并两个有序数组 2 https://leetcode-cn.com/problems/merge-sorted-array 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 25. K 个一组翻转链表 2 https://leetcode-cn.com/problems/reverse-nodes-in-k-group 3. 无重复字符的最长子串 2 https://leetcode-cn.com/problems/longest-substring-without-repeating-characters 287. 寻找重复数 1 https://leetcode-cn.com/problems/find-the-duplicate-number 59. 螺旋矩阵 II 1 https://leetcode-cn.com/problems/spiral-matrix-ii 191. 位1的个数 1 https://leetcode-cn.com/problems/number-of-1-bits 160. 相交链表 1 https://leetcode-cn.com/problems/intersection-of-two-linked-lists 144. 二叉树的前序遍历 1 https://leetcode-cn.com/problems/binary-tree-preorder-traversal 补充题4. 手撕快速排序 1 https://leetcode-cn.com/problems/sort-an-array 214. 最短回文串 1 https://leetcode-cn.com/problems/shortest-palindrome 61. 旋转链表 1 https://leetcode-cn.com/problems/rotate-list 179. 最大数 1 https://leetcode-cn.com/problems/largest-number 112. 路径总和 1 https://leetcode-cn.com/problems/path-sum 141. 环形链表 1 https://leetcode-cn.com/problems/linked-list-cycle 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 300. 最长上升子序列 1 https://leetcode-cn.com/problems/longest-increasing-subsequence 349. 两个数组的交集 1 https://leetcode-cn.com/problems/intersection-of-two-arrays 补充题21. 字符串相减 1 https://mp.weixin.qq.com/s/kCue4c0gnLSw0HosFl_t7w 剑指 Offer 34. 二叉树中和为某一值的路径 1 https://leetcode-cn.com/problems/er-cha-shu-zhong-he-wei-mou-yi-zhi-de-lu-jing-lcof 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 2. 两数相加 1 https://leetcode-cn.com/problems/add-two-numbers 53. 最大子序和 1 https://leetcode-cn.com/problems/maximum-subarray 189. 旋转数组 1 https://leetcode-cn.com/problems/rotate-array 4. 寻找两个正序数组的中位数 1 https://leetcode-cn.com/problems/median-of-two-sorted-arrays 257. 二叉树的所有路径 1 https://leetcode-cn.com/problems/binary-tree-paths 670. 最大交换 1 https://leetcode-cn.com/problems/maximum-swap 283. 移动零 1 https://leetcode-cn.com/problems/move-zeroes 148. 排序链表 1 https://leetcode-cn.com/problems/sort-list 剑指 Offer 54. 二叉搜索树的第k大节点 1 https://leetcode-cn.com/problems/er-cha-sou-suo-shu-de-di-kda-jie-dian-lcof 110. 平衡二叉树 1 https://leetcode-cn.com/problems/balanced-binary-tree 64. 最小路径和 1 https://leetcode-cn.com/problems/minimum-path-sum 122. 买卖股票的最佳时机 II 1 https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-ii 115. 不同的子序列 1 https://leetcode-cn.com/problems/distinct-subsequences 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 226. 翻转二叉树 1 https://leetcode-cn.com/problems/invert-binary-tree 100. 相同的树 1 https://leetcode-cn.com/problems/same-tree 129. 求根到叶子节点数字之和 1 https://leetcode-cn.com/problems/sum-root-to-leaf-numbers 459. 重复的子字符串 1 https://leetcode-cn.com/problems/repeated-substring-pattern 78. 子集 1 https://leetcode-cn.com/problems/subsets 46. 全排列 1 https://leetcode-cn.com/problems/permutations 55. 跳跃游戏 1 https://leetcode-cn.com/problems/jump-game 1013. 将数组分成和相等的三个部分 1 https://leetcode-cn.com/problems/partition-array-into-three-parts-with-equal-sum 33. 搜索旋转排序数组 1 https://leetcode-cn.com/problems/search-in-rotated-sorted-array