use std::cmp::*;
use std::collections::*;
use std::io::*;
use std::str::FromStr;
fn read<T: FromStr>() -> T {
    let stdin = stdin();
    let stdin = stdin.lock();
    let token: String = stdin
        .bytes()
        .map(|c| c.expect("failed to read char") as char)
        .skip_while(|c| c.is_whitespace())
        .take_while(|c| !c.is_whitespace())
        .collect();
    token.parse().ok().expect("failed to parse token")
}
fn main(){
    let n:usize = read();
    let mut now = 1;
    let mut cnt = 0;
    while now <= n{
        now *= 2;
        cnt += 1;
    }
    let a = ((now / 2,cnt - 1),(now,cnt));
    if (a.0).0 < n{
        println!("{}",(a.1).1+ (a.1).0 - n);
    }else if (a.0).0 == n{
        println!("{}",(a.0).1);
    }else{
        println!("{}",(a.0).1 + (a.0).0 - n);
    }
}