using System;

public class Program

{

    public static void Main(string[] args)

    {

        do {

            Console.Write("x = ");

            string num = Console.ReadLine();

            string str = Console.ReadLine();

            if (str == "exit"){

                Console.WriteLine("Program has stopped");

                break;

            }

            if(str.Equals(num)){

                Console.WriteLine("You have entered a decimal");

                break;

            }

            else{ 

            int x = Convert.ToInt32(str);

            Console.Write("y = ");

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

            int sum = x + y;

        Console.WriteLine("Result: {0}", sum);

            }

        }

        while (true);

    }

}