摘要：
problem:Given an array of strings, return all groups of strings that are anagrams.Note: All inputs will be in lower-case.思路解析：使用hashmap来存储已排好序的字符串。注意i... 阅读全文
摘要：
Problems:Given an array of integers, every element appears three times except for one. Find that single one. Note:Your algorithm should have a linear ... 阅读全文