数据研发 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 3 https://leetcode-cn.com/problems/sort-an-array 141. 环形链表 3 https://leetcode-cn.com/problems/linked-list-cycle 704. 二分查找 2 https://leetcode-cn.com/problems/binary-search 215. 数组中的第K个最大元素 2 https://leetcode-cn.com/problems/kth-largest-element-in-an-array 54. 螺旋矩阵 2 https://leetcode-cn.com/problems/spiral-matrix 120. 三角形最小路径和 1 https://leetcode-cn.com/problems/triangle 151. 翻转字符串里的单词 1 https://leetcode-cn.com/problems/reverse-words-in-a-string 1143. 最长公共子序列 1 https://leetcode-cn.com/problems/longest-common-subsequence 26. 删除排序数组中的重复项 1 https://leetcode-cn.com/problems/remove-duplicates-from-sorted-array 117. 填充每个节点的下一个右侧节点指针 II 1 https://leetcode-cn.com/problems/populating-next-right-pointers-in-each-node-ii 104. 二叉树的最大深度 1 https://leetcode-cn.com/problems/maximum-depth-of-binary-tree 124. 二叉树中的最大路径和 1 https://leetcode-cn.com/problems/binary-tree-maximum-path-sum 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 补充题5. 手撕归并排序 1 https://leetcode-cn.com/problems/sort-an-array 剑指 Offer 27. 二叉树的镜像 1 https://leetcode-cn.com/problems/er-cha-shu-de-jing-xiang-lcof 21. 合并两个有序链表 1 https://leetcode-cn.com/problems/merge-two-sorted-lists 剑指 Offer 51. 数组中的逆序对 1 https://leetcode-cn.com/problems/shu-zu-zhong-de-ni-xu-dui-lcof 53. 最大子序和 1 https://leetcode-cn.com/problems/maximum-subarray 15. 三数之和 1 https://leetcode-cn.com/problems/3sum 20. 有效的括号 1 https://leetcode-cn.com/problems/valid-parentheses 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 239. 滑动窗口最大值 1 https://leetcode-cn.com/problems/sliding-window-maximum 155. 最小栈 1 https://leetcode-cn.com/problems/min-stack