use std::cmp;
use std::collections::VecDeque;
use std::io::{self, Read};

#[derive(Debug)]
struct Input {
    n: usize,
}

fn next_token(cin_lock: &mut io::StdinLock) -> String {
    cin_lock
        .by_ref()
        .bytes()
        .map(|c| c.unwrap() as char)
        .skip_while(|c| c.is_whitespace())
        .take_while(|c| !c.is_whitespace())
        .collect::<String>()
}

fn read_input(cin_lock: &mut io::StdinLock) -> Input {
    Input {
        n: next_token(cin_lock).parse().unwrap(),
    }
}

fn solve(input: &Input, _cin_lock: &mut io::StdinLock) {
    let mut deq = VecDeque::new();
    deq.push_back((1, 1));

    let mut answer = None;
    let mut checked = vec![false; input.n];
    while !deq.is_empty() {
        let (n, count) = deq.pop_front().unwrap();
        if n == input.n {
            answer = Some(cmp::min(count, answer.unwrap_or(count)));
            break;
        }

        if n > input.n || n < 1 || checked[n - 1] {
            continue;
        }
        checked[n - 1] = true;

        let bits = n.count_ones() as usize;
        deq.push_back((n + bits, count + 1));
        deq.push_back((n - bits, count + 1));
    }

    let answer = match answer {
        Some(a) => a as i32,
        None => -1,
    };
    println!("{}", answer);
}

fn main() {
    let cin = io::stdin();
    let mut cin_lock = cin.lock();

    let input = read_input(&mut cin_lock);
    solve(&input, &mut cin_lock);
}