fn main() {
    let stdin = std::io::read_to_string(std::io::stdin().lock()).unwrap();
    let mut stdin = stdin.split_ascii_whitespace();

    let n: usize = stdin.next().unwrap().parse().unwrap();
    let a: Vec<u16> = (0..n)
        .map(|_| stdin.next().unwrap().parse().unwrap())
        .collect();

    use std::io::Write;
    std::io::stdout()
        .lock()
        .write_all(output(solve(a)).as_bytes())
        .unwrap();
}

fn solve(a: Vec<u16>) -> usize {
    let n = a.len();
    let mut dp = [[false; 1 << 15]; 2];
    dp[0][0] = true;

    a.into_iter().enumerate().for_each(|(i, a)| {
        for j in 0..dp[(i & 1) ^ 1].len() {
            dp[(i & 1) ^ 1][j] = dp[i & 1][j] || dp[i & 1][j ^ a as usize];
        }
    });
    dp[n & 1].into_iter().filter(|&d| d).count()
}

fn output(ans: usize) -> String {
    ans.to_string() + "\n"
}