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

fn read_stdin() -> Vec<String> {
    let mut buffer = String::new();
    io::stdin().read_to_string(&mut buffer).ok();
    buffer.trim().split('\n').map(|s| s.to_string()).collect()
}

fn main() {
    let n = read_stdin()[0].parse::<usize>().unwrap();
    let mut queue: VecDeque<(usize, usize)> = VecDeque::new();
    queue.push_front((1, 1));

    let mut visited: HashSet<usize> = HashSet::new();

    while !queue.is_empty() {
        let (now, cost) = queue.pop_front().unwrap();
        if now == n {
            println!("{}", cost);
            return;
        }
        let step = format!("{:b}", &now).chars().filter(|c| c == &'1').count();
        let prev = now - step;
        if prev > 0 && !visited.contains(&prev) {
            visited.insert(prev);
            queue.push_back((prev, cost + 1));
        }
        let prog = now + step;
        if prog <= n && !visited.contains(&prog) {
            visited.insert(prog);
            queue.push_back((prog, cost + 1));
        }
    }

    println!("-1");
}