fn getline() -> String{
    let mut ret = String::new();
    std::io::stdin().read_line(&mut ret).ok();
    return ret;
}

fn clap(t: i32, n:i32) -> i32 {
    if t > 2*n {
        return 1 + clap(t, 2*n)
    }
    else if t == n {
        return 0
    }
    else {
        return 1 + clap(t, n + (t-n))
    }
}

fn main() {
    let n:i32 = getline().trim().parse().unwrap();
    println!("{}", clap(n, 1));
}