Y_Q1

public class Q1 {

	public static void main(String[] args) {
		int a = 2, b = 5;
		if(a*b>0)
		{
			if(a>b)
				System.out.println(a%b);
			else
				System.out.println(b%a);
		}
		else
		{
			if(a%2==0 && b%2==0)
				System.out.println(a/2+" "+b/2);
			else
				System.out.println(a*b/2);
		}
	}

}