use std::{convert::TryInto, io::stdin, ops::BitXor};

fn main() {
    let _n = {
        let mut buf = String::new();
        stdin().read_line(&mut buf).unwrap();
    };

    let a_arry = {
        let mut buf = String::new();
        stdin().read_line(&mut buf).unwrap();

        buf.split_whitespace()
            .map(|s| s.parse::<u16>().unwrap())
            .collect()
    };

    println!("{}", solve(a_arry));
}

fn solve(a_arry: Vec<u16>) -> u16 {
    let mut x_arry = [false; 2 << 14];
    x_arry[0] = true;

    for a in a_arry.iter() {
        for (i, _) in x_arry.clone().iter().enumerate().filter(|(_, &b)| b) {
            let i = (i as u16).bitxor(a);
            x_arry[i as usize] = true;
        }
    }

    x_arry.iter().filter(|&&x| x).count().try_into().unwrap()
}