public static string counterGame(long n)
    {
        bool louiseWins = false;
        while (n>1) 
        {
            var log = Math.Log2(n);
            if ((log % 1) != 0)
            {
                log = Math.Floor(log);
                var next = (long)Math.Pow(2, log);
                n = (n - next);
            }
            else 
            {
                 n = n / 2;
            }
            louiseWins = !louiseWins;
        }
        return louiseWins ? "Louise" : "Richard";
    }