use proconio::input;

fn main() {
    input! {
        n: usize,
        mut h: [usize; n],
    }

    let mut ans = 0;
    let mut p = 1;
    for bit in 0..=60 {
        h.sort();

        if let Some(i) = h.iter().position(|&x| (x >> bit) & 1 == 1) {
            h[i] -= p;
            ans += 1;
        } else {
            for i in 0..n {
                if 0 < h[i] {
                    h[i] = h[i].saturating_sub(p);
                    ans += 1;
                    break;
                }
            }
        }

        p *= 2;
    }
    println!("{}", ans);
}