#include <iostream>
#include <utility>
 
using namespace std;
 
pair<int, int> test() {
    return make_pair(13, 42);
}

int main() {
    int a = 1, b = 2;

    pair<int&, int&>(a, b) = test();
    //make_pair<int&, int&>(a, b) = test();

    cout << a << ' ' << b << endl;
}