using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var characters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ23456789".ToCharArray().ToList();

        var input = "QDS-AGA-VHY";

        input = input.Replace("-", "");

​

        ulong total = 0;

        for(var i = 0; i < input.Length; i ++)

        {

            var pos = i;

            var v = (ulong)(Math.Pow(characters.Count, i) * characters.IndexOf(input[pos]));

            total += v;

        }

        var digits = total.ToString()

                        .ToCharArray()

                        .Select(c => c.ToString())

                        .ToArray();;

        var accountId = digits[12] + digits[3] + digits[2] + digits[1];

        var siteId = digits[13] + digits[9] + digits[8] + digits[7]  + digits[6];

        var dayOfMonth = digits[5] + digits[4];

        var hour = digits[11] + digits[10];

        Console.WriteLine("siteId = " + siteId);

        Console.WriteLine("accountId = " + accountId);

        Console.WriteLine("accountId = " + accountId);

        Console.WriteLine("dayOfMonth = " + dayOfMonth);

        Console.WriteLine("hour = " + hour);

        Console.WriteLine("");

        Console.WriteLine("Decoded Value = " + total.ToString());

    }

}