#include <iostream>

using namespace std;

int add(int number) {
    int sum = 0;
    while (number > 0) {
        sum = sum + number % 10;
        number = number / 10;
    }
    return sum;
}

void perfect_number(int number) {
    int sum = 0;
    for (int i = 1; i < number; i++) {
        if (number % i == 0) {
            sum = sum + i;
        }
    }
    if (sum == number) {
        cout << number << " is a perfect number";
    } else {
        cout << number << " is not a perfect number";
    }
}

int main() {
    int input_number;
    for (;;) {
        cout << "Input number: ";
        cin >> input_number;
        if (input_number > 0) break;
    }

    int sum = add(input_number);
    cout << "Sum is " << sum << endl;
    perfect_number(sum);

    return 0;
}

// namesto while use for