284-窥探迭代器(Peeking Iterator) 原文链接: https://leetcode-cn.com/problems/peeking-iterator 英文原文Design an iterator that supports the peek operation on an 2021-12-03 数组设计迭代器 中等
287-寻找重复数(Find the Duplicate Number) 原文链接: https://leetcode-cn.com/problems/find-the-duplicate-number 英文原文Given an array of integers nums containing n 2021-12-03 二分查找位运算双指针数组 中等
289-生命游戏(Game of Life) 原文链接: https://leetcode-cn.com/problems/game-of-life 英文原文According to Wikipedia's article: "The Game of L 2021-12-03 数组模拟矩阵 中等
290-单词规律(Word Pattern) 原文链接: https://leetcode-cn.com/problems/word-pattern 英文原文Given a pattern and a string s, find if s follows the sam 2021-12-03 哈希表字符串 简单
292-Nim 游戏(Nim Game) 原文链接: https://leetcode-cn.com/problems/nim-game 英文原文You are playing the following Nim Game with your friend: Ini 2021-12-03 博弈数学脑筋急转弯 简单
295-数据流的中位数(Find Median from Data Stream) 原文链接: https://leetcode-cn.com/problems/find-median-from-data-stream 英文原文The median is the middle value in an ordered i 2021-12-03 双指针堆(优先队列)排序数据流设计 困难
297-二叉树的序列化与反序列化(Serialize and Deserialize Binary Tree) 原文链接: https://leetcode-cn.com/problems/serialize-and-deserialize-binary-tree 英文原文Serialization is the process of conve 2021-12-03 二叉树字符串广度优先搜索树深度优先搜索设计 困难
299-猜数字游戏(Bulls and Cows) 原文链接: https://leetcode-cn.com/problems/bulls-and-cows 英文原文You are playing the Bulls and Cows game with your friend. Y 2021-12-03 哈希表字符串计数 中等
300-最长递增子序列(Longest Increasing Subsequence) 原文链接: https://leetcode-cn.com/problems/longest-increasing-subsequence 英文原文Given an integer array nums, return the leng 2021-12-03 二分查找动态规划数组 中等
301-删除无效的括号(Remove Invalid Parentheses) 原文链接: https://leetcode-cn.com/problems/remove-invalid-parentheses 英文原文Given a string s that contains parentheses and l 2021-12-03 回溯字符串广度优先搜索 困难