use std::io::Read;

fn main(){
    let mut input = "".to_owned();
    std::io::stdin().read_to_string(&mut input).unwrap();
    let mut input = input.split_ascii_whitespace();
    macro_rules! read(($ty:ty) => (input.next().unwrap().parse::<$ty>().unwrap()));
    
    let n=read!(usize);
    let mut list=vec![!0;n];
    for i in 0..n{
        list[i]=i+1;
    }

    let mut dist=vec![0;n];
    dist[0]=1;
    let mut que=std::collections::VecDeque::new();
    que.push_back(0);

    while let Some(pos)=que.pop_front(){
        if pos==n-1{
            println!("{}",dist[pos]);
            std::process::exit(0);
        }
        else{
            let r=(pos+1).count_ones();
            for dir in [1,-1]{
                let next=pos+(dir*r as i64) as usize;
                if next<n && dist[next]==0{
                    dist[next]=dist[pos]+1;
                    que.push_back(next);
                }
            }
        }
    }
    println!("-1");
}