// test that call-by-value is used


class Main {
	void main() {
		int x;
		A a;
		a = new A();
		a.a = 50;
		aux(a.a);
		x = a.a;
		write(x);
	}
	
	void aux (int arg){
		arg = arg + 1;
	}
}

class A {
	int a;
}