题目: 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? 解题思路: 很简单的一题,直接用异或运算解决:连个相同数进行异或结果为0,0与…

异或巧用:Single Number 今天刷leetcode,碰到了到题Single Number.认为解答非常巧妙,故记之... 题目: 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 w…

题目: 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 complexity. Could you implement it without using extra memory? 解题思路: 这题比Single Number稍难些,不能用异或解决…

题目链接 题目要求: 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? 这道题属于比较简单的,程序如下: class Solution…

题目 落单的数 III 给出2*n + 2个的数字,除其中两个数字之外其他每个数字均出现两次,找到这两个数字. 样例 给出 [1,2,2,3,4,4,5,3],返回 1和5 挑战 O(n)时间复杂度,O(1)的额外空间复杂度 解题 根据落单的数I,可以想到,所有的数进行异或运行的结果就是所求两个数的异或结果. 这个异或的结果,二进制数是1的位置说明这两个数对应的二进制位不相同.然后再怎么还原???参考,理解的不是很透,找到第k位后,再判断数组中所以数的第k位是0 还是1,,出现两次的数对求解无影…

public int SingleNumber(int[] nums) { if(nums==null||nums.Length%2==0) return 0; int ret=nums[0]; for(int i=1;i<nums.Length;i++) { ret=ret^nums[i]; } return ret; } 用List<int> 超时了…

Given an array of numbers nums, in which exactly two elements appear only once and all the other elements appear exactly twice. Find the two elements that appear only once. For example: Given nums = [1, 2, 1, 3, 2, 5], return [3, 5]. Note: The order…

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 complexity. Could you implement it without using extra memory? 这道题是之前那道 Single Number 单独的数字的延伸,那道题的解法…

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? 本来是一道非常简单的题,但是由于加上了时间复杂度必须是O(n),并且空间复杂度为O(1)…

题目描述: Single Number 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? Single Number II Given…