import java.util.LinkedList;
import java.util.Queue;
import java.util.Scanner;

public class Main {
	
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int N = scan.nextInt();
		scan.close();
		boolean flag[] = new boolean[N+1];
		int ans = Integer.MAX_VALUE;
			
		Queue<Node> q = new LinkedList<>();
		q.add(new Node(1,1));
		
		while(!q.isEmpty()) {
			Node v = q.poll();
			
			if(v.number == N) {
				ans = Math.min(ans, v.number);
				continue;
			}
			
			flag[v.number] = true;
			
			int nextRight = v.number + (Integer.bitCount(v.number));
			if(nextRight <= N && !flag[nextRight]) { 
				q.add(new Node(nextRight, v.steps+1));
			}
			
			int nextLeft = v.number - (Integer.bitCount(v.number));
			if(nextLeft >= 1 && !flag[nextLeft]) { 
				q.add(new Node(nextLeft, v.steps+1));
			}
		}
		
		if(ans == Integer.MAX_VALUE) {
			System.out.println("-1");
		} else { 
			System.out.println(ans);
		}
	}
}

class Node {
	int number;
	int steps;
	Node(int number , int steps) {
		this.number = number;
		this.steps = steps;
	}
}