class Pows
    {
        [STAThread]
        public static void Main(string[] args)
        {
            Console.Write("Enter a: ");
            int a = Convert.ToInt32(Console.ReadLine());

            Console.Write("Enter n: ");
            int n = Convert.ToInt32(Console.ReadLine());

            Console.WriteLine("Answer: {0}" ,NegPow(a, n));
        }

        public static double NegPow(int a, int n)
        {
            return 1 / Pow(a, n);
        }

        public static double Pow(int a, int n)
        {
            if (n == 0) { return (1); }
            else return (a * Pow(a, --n));
        }
    }