#include <bits/stdc++.h>
using namespace std;
int main(){
int n, sum;
cin >> n;
for (int i = 1; i < n; i++){
if (n % i == 0){
sum += i;
}
}
if (sum == n){
cout << n << " is perfect" << endl;
}
else cout << n << " is not perfect" << endl;
}
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