using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(" Please enter a day of the year you are curious about. (A number from 1 to 356) ");

        start:

        string x = Console.ReadLine();

        short day; 

        if(short.TryParse(x, out day))

        {

            if(day > 365 || day <1)

            {Console.WriteLine(" Please enter a value between 1 and 365");

              goto start;

            }

            int weekday = (day +5) %7;

              switch(weekday)

            {

                  case 0:

                        Console.WriteLine("This day is Sunday");

                      break;

                  case 1:

                        Console.WriteLine("This day is Monday");

                       break;

                  case 2:

                        Console.WriteLine("This day is Tuesday");

                        break;

                  case 3:

                        Console.WriteLine("This day is Wednesday");

                        break;

                  case 4:

                        Console.WriteLine("This day is Thursday");

                      break;

                  case 5:

                        Console.WriteLine("This day is Friday");

                      break;

                  case 6:

                        Console.WriteLine("This day is Saturday");

                      break;

              }         

        }

    else

    {Console.WriteLine("Please enter an appropriate value." );

     goto start;

    }

    Console.WriteLine("Do you want to run the program again? y/n");

    string choice = Console.ReadLine();

    if(choice == "Y" || choice == "y")

        goto start;

    else

        Console.WriteLine("Thank your for using this program");

    }

}