use std::io::Read;

fn main() {
    let mut buf = String::new();
    std::io::stdin().read_to_string(&mut buf).unwrap();
    
    let n: usize = buf.trim().parse().unwrap();
    
    let mut positions: Vec<usize> = vec![1];
    let mut is_checked: Vec<bool> = vec![false; n+1];
    is_checked[1] = true;
    
    let mut layer: usize = 1;
    let mut answer: Option<usize> = None;
    
    while !positions.is_empty() {
        if is_checked[n] {
            answer = Some(layer);
            break;
        }
        
        let mut new_positions: Vec<usize> = vec![];
        for p in positions.iter() {
            let ones: usize = p.count_ones() as usize;
            
            let f: usize = p + ones;
            let b: usize = p.saturating_sub(ones);
            
            if f > 1 && f <= n 
               && !is_checked[f] {
                new_positions.push(f);
                is_checked[f] = true;
            }
            if b > 1 && b <= n 
               && !is_checked[b] {
                new_positions.push(b);
                is_checked[b] = true;
            }
        }
        
        layer += 1;
        positions = new_positions;
    }
    
    if let Some(a) = answer {
        println!("{}", a);
    } else {
        println!("-1")
    }
}