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 补充题4. 手撕快速排序 4 https://leetcode-cn.com/problems/sort-an-array 142. 环形链表 II 4 https://leetcode-cn.com/problems/linked-list-cycle-ii 剑指 Offer 10- I. 斐波那契数列 3 https://leetcode-cn.com/problems/fei-bo-na-qi-shu-lie-lcof 155. 最小栈 3 https://leetcode-cn.com/problems/min-stack 206. 反转链表 3 https://leetcode-cn.com/problems/reverse-linked-list 236. 二叉树的最近公共祖先 2 https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-tree 53. 最大子序和 2 https://leetcode-cn.com/problems/maximum-subarray 69. x 的平方根 2 https://leetcode-cn.com/problems/sqrtx 141. 环形链表 2 https://leetcode-cn.com/problems/linked-list-cycle 232. 用栈实现队列 2 https://leetcode-cn.com/problems/implement-queue-using-stacks 54. 螺旋矩阵 2 https://leetcode-cn.com/problems/spiral-matrix 剑指 Offer 52. 两个链表的第一个公共节点 2 https://leetcode-cn.com/problems/liang-ge-lian-biao-de-di-yi-ge-gong-gong-jie-dian-lcof 46. 全排列 2 https://leetcode-cn.com/problems/permutations 19. 删除链表的倒数第N个节点 2 https://leetcode-cn.com/problems/remove-nth-node-from-end-of-list 86. 分隔链表 1 https://leetcode-cn.com/problems/partition-list 48. 旋转图像 1 https://leetcode-cn.com/problems/rotate-image 312. 戳气球 1 https://leetcode-cn.com/problems/burst-balloons 718. 最长重复子数组 1 https://leetcode-cn.com/problems/maximum-length-of-repeated-subarray 169. 多数元素 1 https://leetcode-cn.com/problems/majority-element 151. 翻转字符串里的单词 1 https://leetcode-cn.com/problems/reverse-words-in-a-string 78. 子集 1 https://leetcode-cn.com/problems/subsets 146. LRU缓存机制 1 https://leetcode-cn.com/problems/lru-cache 234. 回文链表 1 https://leetcode-cn.com/problems/palindrome-linked-list 1143. 最长公共子序列 1 https://leetcode-cn.com/problems/longest-common-subsequence 83. 删除排序链表中的重复元素 1 https://leetcode-cn.com/problems/remove-duplicates-from-sorted-list 21. 合并两个有序链表 1 https://leetcode-cn.com/problems/merge-two-sorted-lists 876. 链表的中间结点 1 https://leetcode-cn.com/problems/middle-of-the-linked-list 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 剑指 Offer 21. 调整数组顺序使奇数位于偶数前面 1 https://leetcode-cn.com/problems/diao-zheng-shu-zu-shun-xu-shi-qi-shu-wei-yu-ou-shu-qian-mian-lcof 239. 滑动窗口最大值 1 https://leetcode-cn.com/problems/sliding-window-maximum 63. 不同路径 II 1 https://leetcode-cn.com/problems/unique-paths-ii 64. 最小路径和 1 https://leetcode-cn.com/problems/minimum-path-sum 补充题19. 判断一个点是否在三角形内 1 https://mp.weixin.qq.com/s/qnVUJq4lmnLsXJgyHCXngA 24. 两两交换链表中的节点 1 https://leetcode-cn.com/problems/swap-nodes-in-pairs 200. 岛屿数量 1 https://leetcode-cn.com/problems/number-of-islands 226. 翻转二叉树 1 https://leetcode-cn.com/problems/invert-binary-tree 25. K 个一组翻转链表 1 https://leetcode-cn.com/problems/reverse-nodes-in-k-group 7. 整数反转 1 https://leetcode-cn.com/problems/reverse-integer 225. 用队列实现栈 1 https://leetcode-cn.com/problems/implement-stack-using-queues 62. 不同路径 1 https://leetcode-cn.com/problems/unique-paths 121. 买卖股票的最佳时机 1 https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock 88. 合并两个有序数组 1 https://leetcode-cn.com/problems/merge-sorted-array 516. 最长回文子序列 1 https://leetcode-cn.com/problems/longest-palindromic-subsequence 144. 二叉树的前序遍历 1 https://leetcode-cn.com/problems/binary-tree-preorder-traversal 102. 二叉树的层序遍历 1 https://leetcode-cn.com/problems/binary-tree-level-order-traversal 559. N叉树的最大深度 1 https://leetcode-cn.com/problems/maximum-depth-of-n-ary-tree 剑指 Offer 40. 最小的k个数 1 https://leetcode-cn.com/problems/zui-xiao-de-kge-shu-lcof 199. 二叉树的右视图 1 https://leetcode-cn.com/problems/binary-tree-right-side-view 20. 有效的括号 1 https://leetcode-cn.com/problems/valid-parentheses 4. 寻找两个正序数组的中位数 1 https://leetcode-cn.com/problems/median-of-two-sorted-arrays 160. 相交链表 1 https://leetcode-cn.com/problems/intersection-of-two-linked-lists 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 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 113. 路径总和 II 1 https://leetcode-cn.com/problems/path-sum-ii 70. 爬楼梯 1 https://leetcode-cn.com/problems/climbing-stairs 300. 最长上升子序列 1 https://leetcode-cn.com/problems/longest-increasing-subsequence 889. 根据前序和后序遍历构造二叉树 1 https://leetcode-cn.com/problems/construct-binary-tree-from-preorder-and-postorder-traversal 468. 验证IP地址 1 https://leetcode-cn.com/problems/validate-ip-address