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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?

代码：

1 class Solution {
2 public:
3     int singleNumber(vector<int>& nums) {
4         int result = 0;
5         for (auto c : nums)
6             result ^= c;
7         return result;
8     }
9 };

LeetCode: 136 Single Number(easy)

标签：code   nbsp   solution   element   auto   cto   div   logs   enum   

原文地址：http://www.cnblogs.com/llxblogs/p/7434881.html