Longest Consecutive Sequence Given an unsorted array of integers, find the length of the longest consecutive e…

Given a string containing just the characters '(', ')', '{', '}', '[' and '…

Hamming Distance 计算两个二进制数中 对应位上不同的数字总数 class Solution { func hammingDistance(_ x: Int, _ y: Int) -> Int { v…

  Write a program that outputs the string representation of numbers from 1 to n. But for multiples o…

题目描述 Given an array and a value, remove all instances of that value in place and return the new length. The or…

Given a sorted array of integers, find the starting and ending position of a given target value. Your algorith…

1 题目描述 Given n pairs of parentheses, write a function to generate all combinations of well-formed parentheses.…

832. Flipping an Image 题目链接 832. Flipping an Image 题目分析 题目要求把一个只有0和1的二维数组中的0和1取反变为1和0。即1变0，0变1。 且需要把每行数据倒序过来。 …

852. Peak Index in a Mountain Array 题目链接 852. Peak Index in a Mountain Array 题目分析 这个题目比较简单。要求返回数组中最大值的索引。 思路 先…

  Given an array of integers with possible duplicates, randomly output the index of a given target number…

  Design your implementation of the circular queue. The circular queue is a linear data structure in whic…

Given an array with n objects colored red, white or blue, sort them so that objects of the same colo…