Given an array of integers, every element appears three times except for one. Find that singl…

  Given an integer n, count the total number of digit 1 appearing in all non-negative integers less than …

  This is a follow up of Shortest Word Distance. The only difference is now you are given …

  You are given an array x of n positive numbers. You start at point (0,0) and moves x[0] metres to the n…

题目描述 Given two binary strings, return their sum (also a binary string). For example, a = “11” b = “1” Return “…

https://leetcode.com/problems/median-of-two-sorted-arrays/description/ 首先理解什么是中位数, 最简单的理解就是位置在最中间的那个数, 当数组长度为奇…

93. Restore IP Addresses 题目 Given a string containing only digits, restore it by returning all possible valid …

题目： Two elements of a binary search tree (BST) are swapped by mistake. Recover the tree without changing its s…

Given a binary array, find the maximum number of consecutive 1s in this array. Example 1: Input: [1,1,0,1,1,1]…

题目内容： 编写一个程序, 对用户录入的产品信息进行格式化。 以下为程序的运行结果示例： Enter item number: 385↙ Enter unit price: 12.5↙ Ent…

前言 个人网站 公众号: 北京程序猿, 网站 : https://yaml.vip 算法题 题干 对于非负整数 X 而言，X 的数组形式是每位数字按从左到右的顺序形成的数组。例如，如果 X = 1231，那么其数组形式为…

题目 Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the va…