#include <iostream>
#include <cstdlib>
using namespace std;         //using directive

#include "lib1.h"
#include "lib2.h"
using namespace lib1;        //using directive

int main()
{
	cout << x << "\n";       //lib1::x and std::cout
	cout << lib2::x << "\n";

	f();                     //lib1::f
	lib2::f();

	date d1;                 //lib1::date
	lib2::date d2;

	return EXIT_SUCCESS;
}