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 a: Vec = (0..n) .map(|_| itr.next().unwrap().parse().unwrap()) .collect(); let mut dp: Vec = vec![false; 20000]; dp[0] = true; for i in 0..n { for j in (0..18000).rev() { dp[j ^ a[i]] |= dp[j]; } } let mut ans = 0; for i in 0..18000 { ans += dp[i] as usize; } println!("{}", ans); }