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

class P
{
    static int Search(int goal)
    {
        int x = 1;
        int c = 1;
        int step = 1;
        Tuple<int, int> post;
        Tuple<int, int> pre;
        path.Add(Tuple.Create(x,c));

        if (x == goal)
        {
            return 1;
        }

        while (path.Count != 0)
        {
            if (x == goal)
            {
                return c;
            }
            else
            {
                Tuple<int, int> t = path.First();
                x = t.Item1;
                c = t.Item2;
                step = Convert.ToString(x, 2).Replace("0", "").Length;
                post = Tuple.Create(x + step, c + 1);
                pre = Tuple.Create(x - step, c + 1);
                if (1 <= post.Item1 && post.Item1 <= goal)
                {
                    if (path.Contains(post))
                    {
                    }
                    else
                    {
                        path.Add(post);
                    }
                }
                if (1 <= pre.Item1 && pre.Item1 <= goal)
                {
                    if (path.Contains(pre))
                    {
                    }
                    else
                    {
                        path.Add(pre);
                    }
                }
                path.Remove(t);
            }
        }
        return -1;
    }

    static List<Tuple<int, int>> path = new List<Tuple<int, int>>();

    static void Main()
    {
        Console.WriteLine(Search(int.Parse(Console.ReadLine())));
    }
}