using System;

public class Program

{

    public static void Main()

    {

        int number;

        Console.WriteLine("numbers ubscribers the crate");

        number=int.Parse(Console.ReadLine());

    if (number>15)

    {

        Console.WriteLine("The course is available");

        Console.WriteLine(number);

    }

        else

        {

        Console.WriteLine("The number of registrants is less than required");

        Console.WriteLine(15-number);

        }

    }

}