import java.util.*;

public class Main {
	public static void main (String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		HashSet<Integer> set = new HashSet<>();
		set.add(0);
		for (int i = 0; i < n; i++) {
		    HashSet<Integer> tmp = new HashSet<>();
		    int x = sc.nextInt();
		    for (int y : set) {
		        tmp.add(x ^ y);
		    }
		    set.addAll(tmp);
		}
		System.out.println(set.size());
	}
}