Problem: Given a non-empty string check if it can be constructed by taking a substring of it and appending multiple copies of the substring together. You may assume the given string consists of lowercase English letters only and its length will not e
Given a non-empty string s, you may delete at most one character. Judge whether you can make it a palindrome. Example 1: Input: "aba" Output: True Example 2: Input: "abca" Output: True Explanation: You could delete the character 'c'. N
Given an array of strings, group anagrams together. For example, given: ["eat", "tea", "tan", "ate", "nat", "bat"], Return: [ ["ate", "eat","tea"], ["nat",
Given a non-empty string s and a dictionary wordDict containing a list of non-empty words, determine if s can be segmented into a space-separated sequence of one or more dictionary words. Note: The same word in the dictionary may be reused multiple t
Given a char array representing tasks CPU need to do. It contains capital letters A to Z where different letters represent different tasks.Tasks could be done without original order. Each task could be done in one interval. For each interval, CPU cou
17.14 Oh, no! You have just completed a lengthy document when you have an unfortunate Find/Replace mishap. You have accidentally removed all spaces, punctuation, and capitalization in the document. A sentence like "I reset the computer. It still didn
算数操作符加法操作符(+),减法操作符(-),除法操作符(/),乘法操作符(*)还可以把多种操作组合在一起:1+4*5避免产生歧义,可以用括号把不同的操作分隔开来:1+(4*5):(1+4)*5变量可以包含操作: var total = (1+4)*5; 还可以对变量进行操作: var temp_fahrenheit = 95; var temp_celsius = (temp_fahrenheit - 32)/1.8; js提供了一些非常有用的操作符作为各种常用操作的缩写.例如,想给一个数值变