Given a non-empty string check if it can be constructed by taking a substring of it and appending multi…

Given a linked list, determine if it has a cycle in it. Follow up: Can you solve it without using extra space?…

leetcode – 41. First Missing Positive – Hard descrition Given an unsorted integer array, find the …

文章作者：Tyan 博客：noahsnail.com  |  CSDN  |  简书 1. 问题描述 Find the contiguous subarray within an …

Medium Given a non-negative integer, you could swap two digits at most once to get the maximum valued number. …

题目表述 Given n points on a 2D plane, find the maximum number of points that lie on the same straight line. 分析 暴力…

  Given a binary tree, collect a tree’s nodes as if you were doing this: Collect and remove all lea…

题目： Given an array of integers, every element appears three times except for one. Find that single o…

1. 题目 Given a collection of integers that might contain duplicates, nums, return all possible subsets. Note: T…

1. 题目 Implement next permutation, which rearranges numbers into the lexicographically next greater permutation…

题目地址：https://leetcode-cn.com/probl…题目描述：给定一个非负整数数组 A， A 中一半整数是奇数，一半整数是偶数。 对数组进行排序，以便当 A[i] 为奇数时，i 也是奇数；当…

Easy The API: int read4(char *buf) reads 4 characters at a time from a file. The return value is the actual nu…