using System;
using System.Collections.Generic;
using System.Linq;

public class Amatsuki{
    public static void Main(){
        var target = int.Parse(Console.ReadLine());
        
        var pass = new int[0];
        var result = new List<int>();
        
        check(1, target, pass, ref result);
        
        if(result.Any()){
            Console.WriteLine(result.Count);
        }
        else{
            Console.WriteLine(-1);
        }
    }
    
    public static void check(int now, int target, int[] pass, ref List<int> result){
        var passList = pass.ToList();
        passList.Add(now);
        
        if(now == target && passList.Count < result.Count){
            result = passList;
        }
        
        if(passList.Contains(now)){
            return;
        }
        
        var bit = bitCount(now);
        
        if(now + bit <= target){
            check(now + bit, target, passList.ToArray(), ref result);
        }
        
        if(now - bit > 1){
            check(now - bit, target, passList.ToArray(), ref result);
        }
    }
    
    public static int bitCount(int dec){
        var result = 0;
        while(dec > 0){
            if(dec % 2 == 1){
                result++;
            }
            dec /= 2;
        }
        return result;
    }
}