#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;
}