import java.util.*;
import java.util.stream.*;
public class Main{
	public static void main(String... args){
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		int[] ans=new int[n];
		Arrays.fill(ans,Integer.MAX_VALUE);
		Deque<Pair> deq=new ArrayDeque<>();
		deq.add(new Pair(0,0));
		while(deq.size()>0){
			Pair p=deq.removeFirst();
			//put(p);
			//put(Arrays.toString(ans));
			if(ans[p.x]>p.y){
				ans[p.x]=p.y;
				int index=p.x-Integer.bitCount(p.x+1);
				if(index>=0&&index<n)deq.addLast(new Pair(index,p.y+1));
				index=p.x+Integer.bitCount(p.x+1);
				if(index>=0&&index<n)deq.addLast(new Pair(index,p.y+1));
			}
		}
		if(ans[n-1]==Integer.MAX_VALUE){
			put(-1);
		}else{
			put(ans[n-1]+1);
		}
		
	}
	public static class Pair{
		final int x,y;
		Pair(int x,int y){
			this.x=x;
			this.y=y;
		}
		@Override
		public String toString(){
			return String.format("Pair(%d,%d)",x,y);
		}
	}
	
	public static void print(Object object){
        System.out.print(object);
    }
    public static void put(Object object) {
        System.out.println(object);
    }
    public static void put(){
        System.out.println();
    }
 
    public static void print(String format,Object... args){
        System.out.print(String.format(format,args));
    }
    public static void put(String format,Object... args) {
        System.out.println(String.format(format,args));
    }
}