题目： Given an array of non-negative integers, you are initially positioned at the first index of the array. Eac…

欢迎关注本人博客：云端筑梦师 题目: Given a string s and a nonempty string p, find all the start indices of p’s anagrams …

1.0 问题描述 实现10以内四则运算（只包含数字，+-*/和小括号） 2.0 问题分析 四则运算使用“后缀表达式”算法来计算，后缀表达式可以无需考虑运算符优先级，直接从左至右依次计算。 问题分解成2部分，一是将“中缀表…

Dec 19th – Jan 11th around 20 days Need to do medium questions of these tags: DFS BFS DP Stack Heap Trie…

Hard 讲真这道题说不上Hard吧，对Stack, PriorityQueue稍微熟悉一点就能做,注意几点： PriorityQueue的constructor，我一开始纠结于那个initial capacity要怎么…

84. Largest Rectangle in Histogram 题目 Given n non-negative integers representing the histogram's bar height wh…

欢迎fork and star：Nowcoder-Repository-github 11. Container With Most Water 题目 Given n non-negative integers a1, …

  A quadtree is a tree data in which each internal node has exactly four children: topLeft, top…

题目描述 Say you have an array for which the ith element is the price of a given stock on day i. If you were only …

Cheapest Flights Within K Stops There are n cities connected by m flights. Each fight starts from city u and a…

1. 题目 Given an integer n, generate a square matrix filled with elements from 1 to n2 in spiral order. For exam…

题目：Contains Duplicate Given an array of integers, find if the array contains any duplicates. Your function sho…