题目地址：https://leetcode-cn.com/probl…题目描述：写一个 RecentCounter 类来计算最近的请求。 它只有一个方法：ping(int t)，其中 t 代表以毫秒为单位的某…

8. String to Integer (atoi) 题目 Implement atoi to convert a string to an integer. Hint: Carefully consider all …

  Given a text file file.txt, transpose its content. You may assume that each row has the same numbe…

题目： Given an integer n, generate a square matrix filled with elements from 1 to n2 in spiral or…

欢迎fork and star：Nowcoder-Repository-github 123. Best Time to Buy and Sell Stock III 题目 Say you have an array f…

  Write a function that takes a string as input and reverse only the vowels of a string. Example 1:Given …

题目： Given  n  points on a 2D plane, find the maximum number of points that lie on the same straight …

题目： Sort a linked list using insertion sort. 思路： 常规的插入排序，直接上代码。 代码： /** * Definition for singly-linked list. *…

题目： Given a string containing only digits, restore it by returning all possible valid IP address combinations.…

  There are a row of n houses, each house can be painted with one of the three colors: red, blu…

  Given a Binary Search Tree (BST), convert it to a Greater Tree such that every key of the original BST …

  In this problem, a tree is an undirected graph that is connected and has no cycles. The given…