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.…

Problem Design a data structure that supports the following two operations: addWord(word) and search(word) sea…

Given an array of words and a length L, format the text such that each line has exactly L characters and is fu…

Problem Given a sorted linked list, delete all nodes that have duplicate numbers, leaving only distinct number…

题目 Given an array of 2n integers, your task is to group these integers into n pairs of integer, say (a1, b1), …

题目 Given an integer, write an algorithm to convert it to hexadecimal. For negative integer, two’s complement m…

  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 …