/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
    public static void main (String[] args) throws java.lang.Exception
    {
        // your code goes here
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int n = Integer.parseInt(br.readLine());
        ArrayList<Integer> list = new ArrayList<Integer>();
        for(int i=0;i<n;i++){
            list.add(Integer.bitCount(i+1));
        }
        calc(list,0,n,1);
        System.out.println(map.containsKey(n-1)?map.get(n-1):"-1");
    }
    
    static HashMap<Integer,Integer> map = new HashMap<Integer,Integer>();
    public static void calc(ArrayList<Integer> list,int start,int goal,int step){
        if(start<0 || start>=goal){
            return;
        }
        if(map.containsKey(start)&&map.get(start) < step){
            return;
        }
        map.put(start,step);
        if(start==goal){
            return;
        }
        int n = list.get(start);
        if(n>0){
            calc(list,start+n,goal,step+1);
            calc(list,start-n,goal,step+1);
        }
        return;
    }
}