public static BigInteger Palindrome(bool isEven, BigInteger[] i)
        {
            BigInteger x, y, a = 0;
            string s = a.ToString();
            if (isEven)
            {
                for (x = i[0]; x > 0; x--)
                {
                    x--;
                    if ((x * i[1]) < a) return a;
                    for (y = i[1]; y > 0; y--)
                    {
                        if (x * y < a) y = 0;
                        s = (x * y).ToString();
                        if (s.SequenceEqual(s.Reverse()) && BigInteger.Parse(s) > a)
                        {
                            //Console.WriteLine("Even: {0} * {1} = {2}", x, y, s);
                            a = BigInteger.Parse(s);
                            y = 0;
                        }
                    }
                }
            }
            else
            {
                for (x = i[0]; x > 0; x--)
                {
                    if ((x * i[1]) < a) return a;
                    for (y = i[1]; y > 0; y--)
                    {
                        if (x * y < a) y = 0;
                        s = (x * y).ToString();
                        if (s.SequenceEqual(s.Reverse()) && BigInteger.Parse(s) > a)
                        {
                            //Console.WriteLine("Uneven: {0} * {1} = {2}", x, y, s);
                            a = BigInteger.Parse(s);
                            y = 0;
                        }
                    }
                    x--;
                }
            }
            return a;
        }