use std::collections::{VecDeque, HashSet};

fn main() {
    let mut n = String::new();
    std::io::stdin().read_line(&mut n).ok();
    let mut a = String::new();
    std::io::stdin().read_line(&mut a).ok();
    let a: HashSet<usize> = a.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();

    let mut result: Vec<bool> = vec![false; 2usize.pow(15u32)];
    let mut checked: VecDeque<usize> = VecDeque::new();
    result[0] = true;
    checked.push_back(0);
    for v in a.iter() {
        let lim = checked.len();
        for i in 0..lim {
            let val = v ^ checked[i];
            if !result[val] {
                checked.push_back(val);
                result[val] = true;
            }
        }
    }
    println!("{}", checked.len());
}