using System;

using System.Collections;

​

public class Program

{

    public void customers(string str, int computer)

    {

        Hashtable table = new Hashtable();

        int count = 0;

        int not = 0;

        char[] ch = str.ToCharArray();

        bool found = true;

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

        {

            if (table.ContainsKey(ch[i]))

            {

                table.Remove(ch[i]);

                count--;

            }

            else

            {

                table.Add(ch[i], 1);

                count++;

                if (count > computer)

                {

                    found = false;

                    not++;

                }

            }

        }

​

        Console.WriteLine(found + "-" + not);

    }

​

    public static void Main()

    {

        string str = "ABCBCADEED";

        int computer = 1;

        Program program = new Program();

        program.customers(str, computer);

    }

}