using System;

public class Program

{

    public static void Main(string[] args)

    {

        do {

            Console.Write("x = ");

            string str = Console.ReadLine();

            if (str == "exit") {

                Console.WriteLine("Program has stopped");

                break;

            }

            else {

                int x = Convert.ToInt32(str);

                Console.Write("y = ");

                int y = Convert.ToInt32(Console.ReadLine());

                int plus = x + y;

                int minus = x - y;

                int multi = x * y;

                int divi = x / y;

                Console.WriteLine("Addition: {0}", plus);

                Console.WriteLine("Subtraction: {0}", minus);

                Console.WriteLine("Multiplication: {0}", multi);

                Console.WriteLine("Division: {0}", divi);

            }

        }

        while (true);

    }

}