fn movable(x: usize) -> usize {
    let s: String = format!("{:b}", x);
    s.chars().filter(|&c| c == '1').count()
}

use std::io::stdin;
use std::collections::VecDeque;
pub fn main() {
    let n: usize = {
        let mut s = String::new();
        let _ = stdin().read_line(&mut s);
        s.trim().parse().unwrap()
    };

    let mut flags = vec![false; n + 1];
    let mut answer = -1;
    let mut v = VecDeque::<(usize, i32)>::new();
    v.push_back((1, 1));
    while let Some((pos, dist)) = v.pop_front() {
        flags[pos] = true;
        if pos == n {
            answer = dist;
            break;
        }
        let mv = movable(pos);
        if pos + mv <= n && flags[pos + mv] == false {
            v.push_back((pos + mv, dist + 1));
        }
        if pos - mv > 1 && flags[pos - mv] == false {
            v.push_back((pos - mv, dist + 1));
        }
    }
    println!("{}", answer);
}