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

static public class Program
{
    static public void Main()
    {
        var n = readInteger();
        var a = readLong(n, ' ');
        if(n<=20)
        {
            var set = new HashSet<int>();
            for (int i = 0; i < 1<<n; i++)
            {
                var x = 0;
                for (int j = 0; j < n; j++)
                    if (((i >> j) & 1) == 1) x ^= a[j];
                set.Add(x);
            }
            Console.WriteLine(set.Count);
        }
    }

    static int readInteger()
    {
        var s = Console.ReadLine();
        return int.Parse(s);
    }
    static int[] readLong(int n, params char[] sep)
    {
        var s = Console.ReadLine().Split(sep);
        if (s.Length != n)
            throw new Exception(string.Format("invalid input, expected{0} actual{1}", n, s.Length));
        var ret = new int[n];
        for (int i = 0; i < n; i++)
            ret[i] = int.Parse(s[i]);
        return ret;
    }
    static void readEOF()
    {
        if (Console.In.Peek() >= 0)
            throw new Exception("invalid input too long input file");
    }

}
static public class Ex
{
    static public T Validate<T>(this T input, Func<T, bool> f)
    {
        if (!f(input))
            throw new Exception("invalid input");
        return input;
    }
    static public T[] ValidateArray<T>(this T[] input, Func<T, bool> f)
    {
        foreach (var x in input)
            if (!f(x))
                throw new Exception("invalid input");
        return input;
    }
}