#![allow(non_snake_case)]

use std::collections::{ VecDeque };
use std::io::{ self, prelude::* };

macro_rules! pick {
    ($tokens:expr) => {
        $tokens.next().unwrap().parse().expect("parse error")
    }
}

fn bfs(N: usize) -> Vec<i32> {
    let mut d   = vec![-1; N+1];
    let mut que = VecDeque::<usize>::new();

    que.push_back(1);
    d[1] = 1;

    while !que.is_empty() {
        let i = que.pop_front().unwrap();

        let c = i.count_ones() as usize;
        if i+c <= N && d[i+c] == -1 {
            que.push_back(i+c);
            d[i+c] = d[i] + 1;
        }
        if i >= c+1 && d[i-c] == -1 {
            que.push_back(i-c);
            d[i-c] = d[i] + 1;
        }
    }

    d
}

fn main() {
    let mut s = String::new();
    io::stdin().read_to_string(&mut s).expect("i/o error");
    let mut tokens = s.split_whitespace();

    let N: usize = pick!(tokens);

    let v = bfs(N);
    let ans = v[N];

    println!("{}", ans);
}