数据研发 题目 出现次数 链接 232. 用栈实现队列 3 https://leetcode-cn.com/problems/implement-queue-using-stacks 440. 字典序的第K小数字 1 https://leetcode-cn.com/problems/k-th-smallest-in-lexicographical-order 剑指 Offer 41. 数据流中的中位数 1 https://leetcode-cn.com/problems/shu-ju-liu-zhong-de-zhong-wei-shu-lcof 516. 最长回文子序列 1 https://leetcode-cn.com/problems/longest-palindromic-subsequence 25. K 个一组翻转链表 1 https://leetcode-cn.com/problems/reverse-nodes-in-k-group 226. 翻转二叉树 1 https://leetcode-cn.com/problems/invert-binary-tree 1201. 丑数 III 1 https://leetcode-cn.com/problems/ugly-number-iii 60. 第k个排列 1 https://leetcode-cn.com/problems/permutation-sequence 101. 对称二叉树 1 https://leetcode-cn.com/problems/symmetric-tree 33. 搜索旋转排序数组 1 https://leetcode-cn.com/problems/search-in-rotated-sorted-array 121. 买卖股票的最佳时机 1 https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock 240. 搜索二维矩阵 II 1 https://leetcode-cn.com/problems/search-a-2d-matrix-ii 剑指 Offer 59 - II. 队列的最大值 1 https://leetcode-cn.com/problems/dui-lie-de-zui-da-zhi-lcof 155. 最小栈 1 https://leetcode-cn.com/problems/min-stack 42. 接雨水 1 https://leetcode-cn.com/problems/trapping-rain-water 3. 无重复字符的最长子串 1 https://leetcode-cn.com/problems/longest-substring-without-repeating-characters 5. 最长回文子串 1 https://leetcode-cn.com/problems/longest-palindromic-substring 92. 反转链表 II 1 https://leetcode-cn.com/problems/reverse-linked-list-ii 206. 反转链表 1 https://leetcode-cn.com/problems/reverse-linked-list 112. 路径总和 1 https://leetcode-cn.com/problems/path-sum 718. 最长重复子数组 1 https://leetcode-cn.com/problems/maximum-length-of-repeated-subarray 297. 二叉树的序列化与反序列化 1 https://leetcode-cn.com/problems/serialize-and-deserialize-binary-tree