using System;
using System.Collections.Generic;
using System.Linq;

namespace yukicoder
{
	public class Program
	{
		public static void Main()
		{
			var n = int.Parse(Console.ReadLine());
			var a = Console.ReadLine().Trim().Split(' ').Select(value => int.Parse(value)).Distinct().ToArray();
            var s = new List<int>();
            var k = (int)Math.Pow(2, a.Length)-1;
            while (k >= 0)
            {
                var m = 0;
                var j = Convert.ToString(k, 2);
                while (j.Length < a.Length)
                {
                    j = "0" + j;
                }
				for(var i = 0; i < j.Length; i++)
                {
                    if (j[i] == '1')
                    {
                        m ^= a[i];
                    }
                }
				k--;
                s.Add(m);
            }
            Console.WriteLine(s.Distinct().Count());
		}
    }
}