一题目描述: 给定一个数组,只有一个数字出现一次,其余都是两次,判断那个数字 思路: 不断取出数据进行异或,最后一个数字,因为相同的数字会抵消 代码: public class Solution { public int singleNumber(int[] nums) { int left = nums[0]; for(int i =1; i< nums.length; i++) { left = left ^ nums[i]; } return left; } } 更多leetcode题目,…

Single Number I : 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? Solution: 解法不少,贴一种: class…

题目描述: 给定一个数组,里面除了一个数字,其他的都出现三次.求出这个数字 原文描述: 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 m…

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…

感谢:http://www.cnblogs.com/changchengxiao/p/3413294.html Single Number Total Accepted: 103007 Total Submissions: 217483 Difficulty: Medium Given an array of integers, every element appears twice except for one. Find that single one. Note:Your algorith…

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? 思路: 这个题是Single Number的进阶版,如果其他的数都出现两次而…

Problem Discription: Suppose the array A has n items in which all of the numbers apear 3 times except one. Find the single number. int singleNumber2(int A[], int n) { ; while(n--) { ret ^= A[n]; } return ret; } Related Problem: Suppose the array A ha…

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: 在 Single Number I 中使用了异或一个数两次,原值…

题目描述: 给定一个数组,里面只有两个数组,只是出现一次,其余的数字都是出现两次,找出这个两个数字,数组形式输出 原文描述: 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: G…

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? 自己不会做... 搜答案,发现思路真是太巧妙了 关键:统计每一位上出现1的次…