using System;

public class Program

{

    public static int IntSize( ulong value )

    {

        for(int i = 0; i < 8; ++i) {

            ulong test = (ulong)1 << 8 * i;

            if(value < test) {

                return i;

            }

        }

        return 8;

    }

    public static void Main()

    {

        Console.WriteLine(IntSize(1));

        Console.WriteLine(IntSize(255));

        Console.WriteLine(IntSize(256));

        Console.WriteLine(IntSize(65535));

        Console.WriteLine(IntSize(65536));

        Console.WriteLine(IntSize(4294967295UL));

        Console.WriteLine(IntSize(4294967296UL));

        Console.WriteLine(IntSize(18446744073709551615UL));

    }

}