136. Single Number

136. Single Number

class Solution {
public:
    int singleNumber(vector<int>& nums) {
        int res = 0;
        for(int i=0; i<nums.size(); i++)
        {
            res ^=nums[i];
        }
        return res;
        
    }
};

https://leetcode.com/problems/single-number/description/