use std::io::{self, BufReader, BufWriter, Read, Write};

fn main() {
    let stdin = io::stdin();
    let mut stdin = BufReader::new(stdin.lock());
    let stdout = io::stdout();
    let mut stdout = BufWriter::new(stdout.lock());

    let mut buf = String::new();
    stdin.read_to_string(&mut buf).unwrap();

    let n: u32 = buf.trim_end().parse().unwrap();
    let mut bn = 1;
    let mut i = 0;

    while bn != n {
        if bn * 2 <= n {
            i += 1;
            bn *= 2;
        } else {
            i += 1;
            bn += n - bn;
        }
    }

    writeln!(&mut stdout, "{}", i).unwrap();
}