P55307: Nombres amics

#include <iostream>
using namespace std;


int suma_divisors(int a) {
    int suma = 0;
    int divisor = 1;
    while (divisor <= a/2) {
        if (a%divisor == 0) {
            suma = suma + divisor;
        }
        ++divisor;
    }
    return suma;
}

bool son_amics(int a, int b) {
    if (a == b) return false;
    else {
        if (suma_divisors(a) == b && suma_divisors(b) == a) return true;
        return false;
    }
}

int main() {
    int a, b;
    bool primer = true;
    while (cin >> a >> b) {
        if (son_amics(a, b)) {
            if (primer) cout << '(' << a << ' ' << b << ')';
            else cout << ",(" << a << ' ' << b << ')';
            primer = false;
        }
    }
    cout << endl;
}