摘要：
Given an input string, reverse the string word by word. For example,Given s = "the sky is blue",return "blue is sky the". 题目含义：翻转字符串中的单词的顺序，单词内容不变 阅读全文
摘要：
Given a string containing only digits, restore it by returning all possible valid IP address combinations. For example:Given "25525511135", return ["2 阅读全文
摘要：
A message containing letters from A-Z is being encoded to numbers using the following mapping: Given an encoded message containing digits, determine t 阅读全文
摘要：
Given an absolute path for a file (Unix-style), simplify it. For example,path = "/home/", => "/home"path = "/a/./b/../../c/", => "/c" 题目含义：简化unix路径 阅读全文
摘要：
Given an array of strings, group anagrams together. For example, given: ["eat", "tea", "tan", "ate", "nat", "bat"], Return: Note: All inputs will be i 阅读全文