#include <cstdio>

class A {
public:
	int n;
	A();
	~A();
};

A::A() = default;
A::~A() = default;

class B {
public:
	int n;
	B() = default;
	~B() = default;
};

int main() {
	A a;
	B b;
	printf("A: %d; B: %d\n", a.n, b.n);
	return 0;
}