import java.io.*;
import java.util.*;

public class Main {
    static HashSet<String> strings = new HashSet<>();
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        HashSet<Integer> current = new HashSet<>();
        current.add(0);
        for (int i = 0; i < n; i++) {
            int x = sc.nextInt();
            HashSet<Integer> next = new HashSet<>();
            for (int y : current) {
                int z = x ^ y;
                if (!current.contains(z)) {
                    next.add(z);
                }
            }
            current.addAll(next);
        }
        System.out.println(current.size());
    }
}
class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public double nextDouble() throws Exception {
        return Double.parseDouble(next());
    }
    
    public String next() throws Exception {
        while (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
}