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

    a.sort();
    a.reverse();
    let mut result = 0usize;
    let mut idx = 0;
    let mut rank = 0;
    while idx < n {
        for _ in 0..1<<rank {
            if idx == n {
                break;
            }
            result += rank * a[idx];
            idx += 1;
        }
        rank += 1;
    }
    println!("{}", result);
}