using System;
using System.IO;
using System.Linq;
using System.Collections.Generic;
using System.Text;

public class Program
{

    public void Proc()
    {
        int num = int.Parse(Reader.ReadLine());

        int[] map = new int[num + 1];
        map[1] = 1;
        Queue<int> q = new Queue<int>();
        q.Enqueue(1);
        while(q.Count()>0) {
            int cur = q.Dequeue();
            int step = map[cur];
            int move = Convert.ToString(cur, 2).Count(a => a == '1');
            int[] nextPos = new int[] { cur - move, cur + move };
            foreach(int next in nextPos) {
                if(next<=1) {
                    continue;
                }
                if(next>num) {
                    continue;
                }
                if(map[next]==0||map[next]>step+1) {
                    map[next] = step + 1;
                    q.Enqueue(next);
                }
            }
        }
        if(map[num]==0) {
            Console.WriteLine(-1);
        } else {
            Console.WriteLine(map[num]);
        }
    
    }


    public class Reader
	{
		private static StringReader sr;
		public static bool IsDebug = false;
		public static string ReadLine()
		{
			if (IsDebug)
			{
				if (sr == null)
				{
					sr = new StringReader(InputText.Trim());
				}
				return sr.ReadLine();
			}
			else
			{
				return Console.ReadLine();
			}
		}
		private static string InputText = @"





5




";
	}

	public static void Main(string[] args)
	{
#if DEBUG
		Reader.IsDebug = true;
#endif
		Program prg = new Program();
		prg.Proc();
	}
}