#include <iostream>

class hoge {
	public:
	int a;

	int operator+(int x) {
		return a + x;
	}
};

class fuga {
	public:
	int a;

	int operator+(int x) {
		return a - x;
	}
};

int main()
{
	hoge p;
	fuga q;

	p.a = 3;
	q.a = 3;

	std::cout << p + 2 << std::endl;
	std::cout << q + 2 << std::endl;
}