import java.util.Scanner;
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{Scanner in = new Scanner (System.in);
	System.out.println("1.add \n 2.sub \n 3.multi \n 4.div \n 5.mod");
	System.out.println ("Enter the number of operation you wante : ");
	int operation = in.nextInt();
	System.out.println("Enter the first number :");
	int num1 = in.nextInt();
	System.out.println("Enter the second number :");
	int num2 =in.nextInt();
	switch (operation){
		case 1:
		System.out.println("sum = "+(num1+num2));
		break ;
		case 2:
		System.out.println("sum = " + (num1-num2));
		break;
		case 3:
			System.out.println("sum ="+(num1*num2));
		break;	
		case 4 :
			System.out.println("sum = "+(num1/num2));
		break;	
		case 5:
			System.out.println("sum= "+(num1%num2));
		break;
		default :
		System.out.println("wrong");
		
		
	}
		
	}
}