using System;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{

    private static HashSet<string> signalsobject = new HashSet<string>();

    public enum Signals : long

    {

        SHORT20EMASIGNAL = 2 ^ 7,

        DOUBLESHORTSIGNAL = 2 ^ 8,

    }

​

    ;

    public static void Main()

    {

        signalsobject.Add(Signals.SHORT20EMASIGNAL.ToString());

        signalsobject.Add(Signals.SHORT20EMASIGNAL.ToString());

        signalsobject.Remove(Signals.SHORT20EMASIGNAL.ToString());

        Console.WriteLine(signalsobject.Count);

        Console.WriteLine(signalsobject.Aggregate("", (a, b) => a + " " + b));

    //  Console.WriteLine(signalsobject.Aggregate((a, b) => a + " " + b));

    //Console.WriteLine(signalsobject.ToString());

    //  string a = signalsobject.Count>0? (signalsobject.Aggregate((a, b) => a + " " + b)): "Empty";

        double j=1;

        for (int i=1;1<16;i++)

        {

            j=printPosition(j);

            Console.WriteLine("printPositio" +  j);

        }

    }

     private static double printPosition( double lastPrintPosition)

        {

            lastPrintPosition = lastPrintPosition == 4 ? 1 : lastPrintPosition += 1;

            return lastPrintPosition;

​

        }

}