use std::io::{self, BufReader, BufWriter, Read, Write};

fn main() {
    let stdin = io::stdin();
    let mut stdin = BufReader::new(stdin.lock());
    let stdout = io::stdout();
    let mut stdout = BufWriter::new(stdout.lock());

    let mut buf = String::new();
    stdin.read_to_string(&mut buf).unwrap();

    let n: usize = buf.trim_end().parse().unwrap();
    match search(n) {
        Some(i) => writeln!(&mut stdout, "{}", i).unwrap(),
        None => writeln!(&mut stdout, "-1").unwrap(),
    };
}

fn search(n: usize) -> Option<usize> {
    let mut visited = vec![0; n + 1];
    let mut queue = Vec::new();

    visited[1] = 1;
    queue.push(1);

    while let Some(v) = queue.pop() {
        if v == n {
            return Some(visited[v]);
        }

        let i = v.count_ones() as usize;
        let left = v as i32 - i as i32;
        let right = v + i;

        if left > 0 {
            let left = left as usize;
            if visited[left] == 0 {
                visited[left] = visited[v] + 1;
                queue.push(left);
            }
        }
        if right <= n {
            if visited[right] == 0 {
                visited[right] = visited[v] + 1;
                queue.push(right);
            }
        }
    }

    return None;
}