fn main() {
    let mut n = String::new();
    std::io::stdin().read_line(&mut n).ok();
    let mut n: usize = n.trim().parse().unwrap();
    let n_org = n;

    let mut summary: usize = 0;
    while n > 0 {
        summary += n;
        n /= 2;
    }
    println!("{}", 2 * n_org - summary);
}