题目描述：
Given an array of strings, return all groups of strings that are anagrams.
Note: All inputs will be in lower-case.
题目大意：
给定一个字符串数组，返回所有互为字谜（anagram，变位词）的字符串的分组。
注意：所有输入只包含小写字母
解题思路：
排序 + 哈希，使用Python的内置函数，例如reduce，filter等，可以简化代码。
标签归档：leetcode
[LeetCode]Anagrams
[LeetCode]Valid Anagram
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LeetCode.
题目描述：
Given two strings s and t, write a function to determine if t is an anagram of s.
For example,
s = "anagram", t = "nagaram", return true.
s = "rat", t = "car", return false.
Note:
You may assume the string contains ...
[LeetCode]Single Number
作者是
发布于
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LeetCode.
题目描述：
Given an array of integers, every element appears twice except for one. Find that single one.
Note:
Your algorithm should have a linear runtime complexity. Could you implement it without using extra memory?
题目大意：
给定一个整数数组，除一个元素只出现一次外，其余各元素均出现两次。找出那个只出现一次的元素。
注意 ...
[LeetCode]Copy List with Random Pointer
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发布于
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LeetCode.
题目描述：
A linked list is given such that each node contains an additional random pointer which could point to any node in the list or null.
Return a deep copy of the list.
题目大意：
给定一个链表，其中的节点包含一个额外的随机指针，可能指向链表中的任意一个节点或者为空。
返回链表的深拷贝。
解题思路：
解法I ...
[LeetCode]Different Ways to Add Parentheses
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发布于
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LeetCode.
题目描述：
Given a string of numbers and operators, return all possible results from computing all the different possible ways to group numbers and operators. The valid operators are +, - and *.
Example 1
Input: "2-1-1".
((2-1)-1) = 0 (2-(1-1 ...