题目描述

完全数

样例

#include <iostream>
#include <cmath>
using namespace std;
int main()
{
    int n,x,sum=0;
    cin >> n;
    for(int i=0;i<n;i++)
    {
        cin >> x;
        if(x==1) 
        cout << x << " is not perfect" << endl;
        else
        {
            sum+=1;
            for(int i2=2;i2<=sqrt(x);i2++) 
            {
                if(x%i2==0)
                {
                    int y=x/i2;
                    if(y==i2) 
                    sum=sum+i2;
                    else 
                    sum=sum+i2+x/i2;
                }
            }
            if(sum==x) 
            cout << x << " is perfect" << endl;
            else 
            cout << x << " is not perfect" << endl;
        }
        sum=0;
    }
    return 0;
}