535-TinyURL 的加密与解密(Encode and Decode TinyURL) 原文链接: https://leetcode-cn.com/problems/encode-and-decode-tinyurl 英文原文Note: This is a companion problem to the System D 2021-12-03 哈希函数哈希表字符串设计 中等
537-复数乘法(Complex Number Multiplication) 原文链接: https://leetcode-cn.com/problems/complex-number-multiplication 英文原文A complex number can be represented as a stri 2021-12-03 字符串数学模拟 中等
538-把二叉搜索树转换为累加树(Convert BST to Greater Tree) 原文链接: https://leetcode-cn.com/problems/convert-bst-to-greater-tree 英文原文Given the root of a Binary Search Tree (BST), c 2021-12-03 二叉搜索树二叉树树深度优先搜索 中等
539-最小时间差(Minimum Time Difference) 原文链接: https://leetcode-cn.com/problems/minimum-time-difference 英文原文Given a list of 24-hour clock time points in " 2021-12-03 字符串排序数学数组 中等
540-有序数组中的单一元素(Single Element in a Sorted Array) 原文链接: https://leetcode-cn.com/problems/single-element-in-a-sorted-array 英文原文You are given a sorted array consisting of 2021-12-03 二分查找数组 中等
541-反转字符串 II(Reverse String II) 原文链接: https://leetcode-cn.com/problems/reverse-string-ii 英文原文Given a string s and an integer k, reverse the first k ch 2021-12-03 双指针字符串 简单
542-01 矩阵(01 Matrix) 原文链接: https://leetcode-cn.com/problems/01-matrix 英文原文Given an m x n binary matrix mat, return the distance of the near 2021-12-03 动态规划广度优先搜索数组矩阵 中等
543-二叉树的直径(Diameter of Binary Tree) 原文链接: https://leetcode-cn.com/problems/diameter-of-binary-tree 英文原文Given the root of a binary tree, return the length 2021-12-03 二叉树树深度优先搜索 简单
546-移除盒子(Remove Boxes) 原文链接: https://leetcode-cn.com/problems/remove-boxes 英文原文You are given several boxes with different colors represented 2021-12-03 动态规划数组记忆化搜索 困难
547-省份数量(Number of Provinces) 原文链接: https://leetcode-cn.com/problems/number-of-provinces 英文原文There are n cities. Some of them are connected, while s 2021-12-03 图并查集广度优先搜索深度优先搜索 中等