macro_rules! scan {
    ($t:ty) => {
        {
            let mut line: String = String::new();
            std::io::stdin().read_line(&mut line).unwrap();
            line.trim().parse::<$t>().unwrap()
        }
    };
    ($t:ty;;) => {
        {
            let mut line: String = String::new();
            std::io::stdin().read_line(&mut line).unwrap();
            line.split_whitespace()
                .map(|t| t.parse::<$t>().unwrap())
                .collect::<Vec<_>>()
        }
    };
    ($t:ty; $n:expr) => {
        (0..$n).map(|_|
                    scan!($t)
        ).collect::<Vec<_>>()
    };
    ($t:ty;;$n:expr) => {
        (0..$n).map(|_| scan!($t;;)).collect::<Vec<_>>()
    };
    ($($t:ty),*; $n:expr) => {
        (0..$n).map(|_|
                    scan!($($t),*)
        ).collect::<Vec<_>>()
    };

    ($($t:ty),*) => {
        {
            let mut line: String = String::new();
            std::io::stdin().read_line(&mut line).unwrap();
            let mut iter = line.split_whitespace();
            (
                $(iter.next().unwrap().parse::<$t>().unwrap(),)*
            )
        }
    };
}

fn rec(n: usize, i: usize, visited: &mut [bool]) -> i64 {
    visited[i] = true;

    if i == n {
        1
    } else {
        let num = (0..20)
            .filter(|j| i & (1usize << j) != 0usize)
            .collect::<Vec<_>>()
            .len();

        let mut ret = 1 << 60;
        if i + num <= n && !visited[i + num] {
            ret = ret.min(rec(n, i + num, visited) + 1)
        }
        if 1 + num <= i && !visited[i - num] {
            ret = ret.min(rec(n, i - num, visited) + 1)
        }
        ret
    }
}

fn main() {
    let n = scan!(usize);

    let mut visited = vec![false; n + 1];
    let n = rec(n, 1, &mut visited);
    if n == 1 << 60 {
        println!("-1")
    } else {
        println!("{}", n)
    }
}