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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main(){
  5.     int n, sum;
  6.     cin >> n;
  7.  
  8.     for (int i = 1; i < n; i++){
  9.         if (n % i == 0){
  10.             sum += i;
  11.         }
  12.     }
  13.     if (sum == n){
  14.         cout << n << " is perfect" << endl;
  15.     }
  16.     else cout << n << " is not perfect" << endl;
  17. }
  18.  
  19.  
Success #stdin #stdout 0.01s 5308KB
comments (?)
stdin
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6
stdout
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6 is perfect
https://ideone.com/IBjh3T
language:
C++ (gcc 8.3)
created:
10 days ago
visibility:
public

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