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

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 input = read_stdin();
    let n = *&input[0].parse::<i16>().unwrap();
    let mut pos: i16 = 1;
    let mut memo = HashSet::new();
    let mut step = 1;
    memo.insert(pos);

    while n != pos {
        let x: i16 = format!("{:b}", pos).chars().filter(|c| c == &'1').count() as i16;
        memo.insert(pos);
        if pos + x <= n {
            pos += x;
        } else {
            pos -= x;
            if pos <= 0 {
                println!("-1");
                return;
            }
        }

        if memo.contains(&pos) {
            println!("-1");
            return;
        }
        step += 1;
    }
    println!("{}", step);
}