using System;

using System.Collections;

​

public class Program

{

    public Hashtable values = new Hashtable();

    public void Arrange()

    {

        Hashtable arr = new Hashtable();

        int i = 0;

        foreach (var item in values.Keys)

        {

            if (Convert.ToInt32(item) == 2)

            {

                if (values.ContainsKey(3) && !arr.ContainsKey(3))

                {

                    arr.Add(2, 0);

                    arr.Add(3, 0);

                }

                else

                {

                    if (!arr.ContainsKey(item))

                    {

                        arr.Add(item, 0);

                    }

                }

            }

            else if (Convert.ToInt32(item) == 3)

            {

                if (values.ContainsKey(2) && !arr.ContainsKey(2))

                {

                    arr.Add(2, 0);

                    arr.Add(3, 0);

                }

                else

                {

                    if (!arr.ContainsKey(item))

                    {

                        arr.Add(item, 0);

                    }

                }

            }

            else

            {

                if (!arr.ContainsKey(item))

                {

                    arr.Add(item, 0);

                }

            }

        }

        foreach(var items in arr.Keys)

        {

            Console.Write("{0},",items);

        }

    }

​

    public static void Main()

    {

        int[] speed = new int[]{5,6,4};

        Program obj = new Program();

        Array.Sort(speed);

        for (int i = 0; i < speed.Length; i++)

        {

            obj.values.Add(speed[i], 0);

        }

​

        obj.Arrange();

    }

}