using System;

public class Program

{

    public static void Main()

    {

        int ticketsonsale = 100;

        int Availabletickets;

        if(ticketsonsale == null){

            Availabletickets = 0;

        }

        else

        {

            Availabletickets = (int)ticketsonsale;

        }

        Console.WriteLine("AvailableTickets = {0}",Availabletickets);

    }

}