import java.util.*;
 

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N=sc.nextInt();
		int ans=1;
		int[] check=new int[N+1];
		Queue<Integer> queue = new LinkedList<>();
		queue.offer(1);
		check[1]=1;
		while(!queue.isEmpty()){
			int temp1 = queue.poll();
			int temp2 = temp1+Integer.bitCount(temp1);
			int temp3=temp1-Integer.bitCount(temp1);
			if(temp2<=N&&check[temp2]==0){
				queue.offer(temp2);
				check[temp2]=check[temp1]+1;
			}
			if(temp3>=1&&check[temp3]==0){
				queue.offer(temp3);
				check[temp3]=check[temp1]+1;
			}
		}
		if(check[N]==0){
			System.out.println(-1);
		}else{
			System.out.println(check[N]);
		}
	}
}