using System;
using System.Collections.Generic;
using System.Linq;
using System.IO;
using System.Text;

namespace Solver
{
    class Program
    {
        const int M = 1000000007;
        static void Main()
        {
            var sw = new System.IO.StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false };
            Scan sc = new Scan();
            var set = new HashSet<long>();
            int n = sc.Int();
            long[] a = sc.LongArray();
            set.Add(0);
            long p = 0;
            long ans = 2;
            foreach (long i in a)
            {
                if (set.Add(i) && set.Add(p = p ^ i))
                    ans *= 2;
                }
            sw.WriteLine(ans);
            sw.Flush();
        }
    }

    class Scan
    {
        public int Int()
        {
            return int.Parse(Console.ReadLine().Trim());
        }
        public long Long()
        {
            return long.Parse(Console.ReadLine().Trim());
        }
        public string Str()
        {
            return Console.ReadLine().Trim();
        }

        public int[] IntArray()
        {
            return Console.ReadLine().Trim().Split().Select(int.Parse).ToArray();
        }
        public void IntTwi(out int a, out int b)
        {
            int[] arr = IntArray();
            a = arr[0];
            b = arr[1];
        }
        public void LongTwi(out long a, out long b)
        {
            long[] arr = LongArray();
            a = arr[0];
            b = arr[1];
        }
        public void StrTwi(out string a, out string b)
        {
            string[] arr = StrArray();
            a = arr[0];
            b = arr[1];
        }

        public long[] LongArray()
        {
            return Console.ReadLine().Trim().Split().Select(long.Parse).ToArray();
        }
        public string[] StrArray()
        {
            return Console.ReadLine().Trim().Split();
        }
    }
}