class Program
    {
        static void Main(string[] args)
        {
            int[] a = new int[] { 1, 3, 4, 5, 8, 5, 5, 8};
            Console.WriteLine(place(a, 5, 0));
        }

        public static int place(int[] a, int n, int p)
        {
            if (p < a.Length)
            {
                if (a[p] == n)
                    return place(a, n, p++) + 1;
                else return place(a, n, p++);
            }
            return 0;
        }
    }