using System;

public class Program

{

    [ThreadStatic]

    private static byte[] buffer = new byte[19];

    public static void Main()

    {

        int digIndex=0; 

        long target = 789019291177L;

        long maxIndex = buffer.Length-1;

        while(target*10L > 10L ){

            byte remaind = (byte)(target%10L);

            target/=10L;

            /* inverse buffer[digitIndex++]= remaind; */

            /* direct  buffer[maxIndex-(digitIndex++)]= remaind;*/

            buffer[maxIndex-(digIndex++)]= remaind;

            Console.WriteLine("debug: {0} {1}", remaind, target);

        }

        Console.WriteLine("debug: {0}", string.Join(",", buffer));

        byte[] result = new byte[digIndex];

        int index=0;

        while(digIndex>0){

            result[index++]=buffer[maxIndex-(--digIndex)];

        }

        Console.WriteLine("target: {0}", 789019291177L);

        Console.WriteLine("result: {0}", string.Join(",", result));

    }

}