using System;

​

public class Program

{

    public static void Main()

    {

        {

            string value;

            do

            {

                Console.WriteLine("First value to add? : ");

                int a1 = Convert.ToInt32(Console.ReadLine());

                Console.WriteLine("Second value to add? : ");

                int a2 = Convert.ToInt32(Console.ReadLine());

                Console.Write(a1+a2);

                Console.WriteLine("Type Y or y to restart the program.");

                value = Console.ReadLine();

            }

            while (value == "Y" || value == "y");

        } 

    }

}