摘要：
Given an array of strings, return all groups of strings that are anagrams.Note: All inputs will be in lower-case.思路：回文构词法是由颠倒字母顺序而来的单词。主要的特点就是字母个数和种类都... 阅读全文
摘要：
The string"PAYPALISHIRING"is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font fo... 阅读全文