import java.util.*;
class B{
	static Scanner s = new Scanner(System.in);
	public static void main(String[] args) {
		int in = Integer.parseInt(s.next());
		int[] m = new int[in];
		Queue<Integer> q = new ArrayDeque<Integer>();

		Arrays.fill(m, Integer.MAX_VALUE);
		m[0]=1;

		q.add(Integer.valueOf(0));
		while(!q.isEmpty()) {
			int i = q.poll(), d = Integer.bitCount(i+1),
				a = i-d, b = i+d;

			if(a>=0        && m[a]>m[i]+1) {
				m[a]=m[i]+1;
				q.add(a);
			}
			if(b< in && m[b]>m[i]+1) {
				m[b]=m[i]+1;
				q.add(b);
			}
		}
		if(m[in-1]==Integer.MAX_VALUE) {
			System.out.println(-1);
		}else {
			System.out.println(m[in-1]);
		}
	}
}