Given a non-empty array of integers, every element appears three times except for one, which appears exactly once. Find that single one. Note ...
题目和上题类似,这里给的数组仅有一个数出现一次,其他的出现 次。返回那个出现一次的数。 这题还是比较难想到的。不想上一题只要异或一下就可以了,不用额外操作。 法一:还是用map方法 法二:还是利用位运算才有办法实现不用额外空间,就是遍历 次每次记录某位的出现的次数,如果不能被三整除,说明那个出现一次的就在该位有值,那么ans 或该位一下就可以了。 法三:还是位运算,这里利用二进制模拟a进制的方法。 ...
2014-12-12 11:21 0 2721 推荐指数:
Given a non-empty array of integers, every element appears three times except for one, which appears exactly once. Find that single one. Note ...
Given an array of integers, every element appears three times except for one. Find that single one. Note:Your algorithm should have a linear runtime ...
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 ...
题目: Given an array of integers, every element appears three times except for one. Find that single one. Note: Your algorithm should have ...
原题地址:http://oj.leetcode.com/problems/single-number-ii/ 题意:Given an array of integers, every element appears three times except for one. Find ...
题目描述: 给定一个包含n个整数的数组,除了一个数出现一次外所有的整数均出现三次,找出这个只出现一次的整数。 题目来源: http://oj.leetcode.com/problems/single-number-ii ...
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, ...
Given an array of integers, every element appears twice except for one. Find that single one. Note: Your algorithm should have a linear runtime ...