吔，爆搜乱搞得了
反正1e8里的完全数也就5个：$6,28,496,8128,33550336$

#include <bits/stdc++.h>
using namespace std;
int main() {
    int x, n;
    cin >> n;
    while (n -- ) {
        cin >> x;
        cout << x << " is ";
        if (x != 6 && x != 28 && x != 496 && x != 8128 && x != 33550336) cout << "not ";
        cout << "perfect" << endl;
    }
}