Single Number II @LeetCode

PROBLEM :

Given an array of integers, every element appears three times except for one, which appears exactly once. Find that single one.

Note:
Your algorithm should have a linear runtime complexity. Could you implement it without using extra memory?

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SIMPLE c++ IMPLEMENTATION :
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class Solution {
public:
    int singleNumber(vector<int>& nums) {
        if(nums.size()==1)
            return nums[0] ;
           
        int result=0 ;
        for(int i=0;i<32;i++){
            int count=0 ;
            int temp ;
           
            temp=(1<<i) ;
            for(int j=0;j<nums.size();j++)
                if(nums[j]&temp)
                    count++ ;
                   
            if(count%3)
                result=result|temp ;
        }
        return result ;
    }
};

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