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]Valid Anagram
[LeetCode]Single Number
作者是
发布于
在
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
作者是
发布于
在
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
作者是
发布于
在
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 ...
[LeetCode]Search a 2D Matrix II
作者是
发布于
在
LeetCode.
题目描述：
Write an efficient algorithm that searches for a value in an m x n matrix. This matrix has the following properties:
Integers in each row are sorted in ascending from left to right.
Integers in each column are sorted ...