use std::collections::VecDeque;

fn main() {
    input!{
        n: usize,
    }
    let mut masu = vec![1_000_000_usize; n + 1];
    masu[1] = 1;
    let mut que = VecDeque::<usize>::new();
    que.push_back(1);

    while let Some(now) = que.pop_front() {
        let ones = count_up_one(now);
        let now_hop = masu[now];
        if now >= 1 + ones { //now - ones >= 1
            let left_next = now - ones;
            if now_hop + 1 < masu[left_next] {
                masu[left_next] = now_hop + 1;
                que.push_back(left_next);
            }
        }
        let right_next = now + ones;
        if right_next <= n {
            if now_hop + 1 < masu[right_next] {
                masu[right_next] = now_hop + 1;
                que.push_back(right_next);
            }
        }
    }
    if masu[n] <= n {
        println!("{}", masu[n]);
    } else {
        println!("-1");
    }
}

fn count_up_one(x: usize) -> usize {
    let mut res = 0;
    let mut x = x;
    while x > 0 {
        if (x & 1) >= 1 {
            res += 1;
        }
        x >>= 1;
    }
    res
}

#[macro_export]
macro_rules! input {
    (source = $s:expr, $($r:tt)*) => {
        let mut iter = $s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
    ($($r:tt)*) => {
        #[allow(unused_mut)]
        let mut s = {
            use std::io::Read;
            let mut s = String::new();
            std::io::stdin().read_to_string(&mut s).unwrap();
            s
        };
        let mut iter = s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
}

#[macro_export]
macro_rules! input_inner {
    ($iter:expr) => {};
    ($iter:expr, ) => {};

    ($iter:expr, $var:ident : $t:tt $($r:tt)*) => {
        let $var = read_value!($iter, $t);
        input_inner!{$iter $($r)*}
    };
}

#[macro_export]
macro_rules! read_value {
    ($iter:expr, ( $($t:tt),* )) => {
        ( $(read_value!($iter, $t)),* )
    };

    ($iter:expr, [ $t:tt ; $len:expr ]) => {
        (0..$len).map(|_| read_value!($iter, $t)).collect::<Vec<_>>()
    };

    ($iter:expr, chars) => {
        read_value!($iter, String).chars().collect::<Vec<char>>()
    };

    ($iter:expr, usize1) => {
        read_value!($iter, usize) - 1
    };

    ($iter:expr, $t:ty) => {
        $iter.next().unwrap().parse::<$t>().expect("Parse error")
    };
}