use std::collections::VecDeque;
use std::cmp::min;
use std::io::*;
use std::str::*;

fn read<T: FromStr>(sl: &mut StdinLock) -> Option<T> {
    let s = sl.by_ref().bytes().map(|c| c.unwrap() as char)
        .skip_while(|c| c.is_whitespace())
        .take_while(|c| !c.is_whitespace())
        .collect::<String>();

    s.parse::<T>().ok()
}

fn run(sl: &mut StdinLock) {
    let n = read::<i32>(sl).unwrap();
    let bits = (0..=n).map(|i| i.count_ones() as i32).collect::<Vec<_>>();
    let mut done = vec![false; bits.len()];

    let mut q = VecDeque::new();
    q.push_back((1, 1));

    const CANNOT_REACH: i32 = 10001;
    let mut result = CANNOT_REACH;
    while !q.is_empty() {
        let (pos, count) = q.pop_front().unwrap();
        if pos == n {
            result = min(result, count);
            continue;
        }
        if pos < 1 || pos > n || done[pos as usize] {
            continue;
        }
        done[pos as usize] = true;

        q.push_back((pos + bits[pos as usize], count + 1));
        q.push_back((pos - bits[pos as usize], count + 1));
    }

    println!("{}", if result == CANNOT_REACH {-1} else {result});
}

fn main() {
    let s = stdin();
    let mut sl = s.lock();
    run(&mut sl);
}