use std::io;
use std::io::prelude::*;
use std::collections::VecDeque;

fn main() -> () {
    let stdin = io::read_to_string(io::stdin()).unwrap();
    let mut stdin = stdin.split_whitespace();
    let stdout = io::stdout();
    let mut stdout = io::BufWriter::new(stdout.lock());

    let n = stdin.next().unwrap().parse::<i32>().unwrap();

    let mut dist = [0; 10001];
    let mut visited = [false; 10001];
    let mut queue = VecDeque::new();
    queue.push_back(1);
    visited[1] = true;
    while let Some(x) = queue.pop_front() {
        let mut p = 0;
        let mut num = x;
        while num != 0 {
            p += num & 1;
            num >>= 1;
        }
        let indxp = (x + p) as usize;
        let indxm: usize = (x - p) as usize;
        if (x + p) <= n && !visited[indxp] {
            visited[indxp] = true;
            dist[indxp] = dist[x as usize] + 1;
            queue.push_back(x + p);
        }
        if (x - p) > 0 && !visited[indxm] {
            visited[indxm] = true;
            dist[indxm] = dist[x as usize] + 1;
            queue.push_back(x - p);
        }
    }
    writeln!(stdout, "{}", if visited[n as usize] { dist[n as usize] + 1 } else { -1 }).unwrap_or(());
}