use std::collections::VecDeque;

fn main() {
	let mut n = String::new();
	std::io::stdin().read_line(&mut n).ok();
	let n: usize = n.trim().parse().unwrap();
	let mut v: Vec<i32> = vec![-1; n + 1];
	let mut q: VecDeque<usize> = VecDeque::new();
	v[1] = 1;
	q.push_back(1);
	
	while !q.is_empty() {
		let p = q.pop_front().unwrap();
		let bp = p.count_ones() as usize;
		if p - bp > 0 && v[p - bp] == -1 {
			v[p - bp] = v[p] + 1;
			q.push_back(p - bp);
		}
		if p + bp <= n && v[p + bp] == -1 {
			v[p + bp] = v[p] + 1;
			q.push_back(p + bp);
		}
	}
	println!("{}", v[n]);
}