Given an array of numbers nums, in which exactly two elements appear only once and all the other ...
利用bitwise XOR的特点,n个数 或 ,如果 的个数为奇数,则n个数bitwise XOR结果为 ,否则为 先将所有的数异或,得到的将是x和y以后之后的值n。 找到这个数n的为 的某一位 为了方便就取最右边为 的一位, n amp n ,再将这一位为 的数异或,其余的数异或,得到的就是x和y的值。 ...
2015-04-04 04:59 0 2377 推荐指数:
Given an array of numbers nums, in which exactly two elements appear only once and all the other ...
Coins in a Line III There are n coins in a line. Two players take turns to take a coin from one of the ends of the line until there are no more ...
Given an array of integers and a number k, find k non-overlapping subarrays which have the largest sum. The number in each subarray should ...
Given an interval list which are flying and landing time of the flight. How many airplanes are on ...
Number of Islands II Given a n,m which means the row and column of the 2D matrix and an array of pair A( size k). Originally, the 2D matrix is all ...
原题地址:http://www.cnblogs.com/x1957/p/3373994.html 题意:Given an array of integers, every element appears twice except for one. Find that single one. ...
问题:找出只出现一次的数,其他数出现了三次分析:将数转化为二进制的位,数出现了三次相当于其对应的二进制上每个位置出现了3次,这里有个抽象的地方就是,例如数中包含1,3两个其二进制的第一位都包含1, ...
Single Number的加强班 有n个数字,除了一个只出现过一次,其他的都出现了3次! 出现两次我们知道就是xor下就木有啦,那3次怎么搞? 我们还是用二进制位的方式来思考。 那么这些位,除去出现过一次的那个后,其他的都是3的倍数!- -我们把所有位1的个数mod 3,那么剩下 ...