import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;

public class Main {

	@SuppressWarnings("resource")
	public static void main(String args[]) {
		Scanner scanner = new Scanner(System.in);
		int n=scanner.nextInt();
		Set<Integer>set=new HashSet<>();
		int a[]=new int[n];
		for(int i=0;i<n;i++) {
			a[i]=scanner.nextInt();
		}
		for(int i=0;i<Math.pow(2, n);i++) {
			int tmp=0;
			for(int j=0;j<n;j++) {
				if((i>>j&1)==1) {
					tmp^=a[j];
				}
			}
			set.add(tmp);
		}
		System.out.println(set.size());
	}
}