leetcode：Single Number

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leetcode：Single Number

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…

Leetcode 137 Single Number II 仅出现一次的数字

原题地址https://leetcode.com/problems/single-number-ii/ 题目描述Given an array of integers, every element appears three times except for one. Find that single one. 给出一个整数数组,除了某个元素外所有元素都出现三次.找出仅出现一次的数字. Note: 注意: Your algorithm should have a linear runtime co…

leetcode 136 Single Number, 260 Single Number III

leetcode 136. 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? 解题思路: 如果以线性复杂度和…

LeetCode 137 Single Number II（仅仅出现一次的数字 II）（*）

翻译给定一个整型数组,除了某个元素外其余的均出现了三次. 找出这个元素. 备注: 你的算法应该是线性时间复杂度. 你能够不用额外的空间来实现它吗? 原文 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…

异或巧用：Single Number

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…