package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
)

var sc = bufio.NewScanner(os.Stdin)

func main() {
	sc.Split(bufio.ScanWords)
	n := nextInt()
	ss := make([]int, n)
	for i := range ss {
		ss[i] = nextInt()
	}

	empty := struct{}{}
	dp := make(map[int]struct{})
	dp[0] = empty

	for _, v := range ss {
		next := make(map[int]struct{})
		for k := range dp {
			next[k] = empty
			next[k^v] = empty
		}
		dp = next
	}
	fmt.Println(len(dp))
}

func nextLine() string {
	sc.Scan()
	return sc.Text()
}

func nextInt() int {
	i, _ := strconv.Atoi(nextLine())
	return i
}