use std::io::*;

fn main() {
    let mut s: String = String::new();
    std::io::stdin().read_to_string(&mut s).ok();
    let mut itr = s.trim().split_whitespace();
    let n: usize = itr.next().unwrap().parse().unwrap();
    let mut a: Vec<u64> = (0..n)
        .map(|_| itr.next().unwrap().parse().unwrap())
        .collect();

    for d in (0..61).rev() {
        let mut x = 0;
        let mut j = 0;
        for i in 0..a.len() {
            if a[i] >> d == 1 {
                x = a[i];
                j = i;
                break;
            }
        }
        if x == 0 {
            continue;
        }
        for i in 0..a.len() {
            a[i] ^= ((a[i] >> d) & 1) * x;
        }
        a[j] = x;
    }
    let ans = a
        .iter()
        .fold(1u64, |acc, x| if *x != 0 { acc << 1 } else { acc });
    println!("{}", ans);
}