using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace YukiCoder_Cs
{
    class Program
    {
        public static void Main()
        {
            var N = int.Parse(Console.ReadLine().Trim());
            var root = CreateRoot(N);

            var Sugoroku = new Sugoroku(root);
            Console.WriteLine($"{Sugoroku.BFSSearch()}");
        }

        private static int[] CreateRoot(int length)
        {
            int[] root = new int[length];
            for (int i = 0; i < length; ++i)
            {
                root[i] = i + 1;
            }
            return root;
        }
    }

    public class Sugoroku
    {
        private int[] visitedArray; // 訪問済み配列
        private int startPos;       // スタートポジション
        private int goalPos;        // ゴールポジション
        
        enum move
        {
            Right,
            Left
        }

        // コンストラクタ
        public Sugoroku(int[] Sugoroku)
        {
            this.visitedArray = new int[Sugoroku.Length + 1];
            this.startPos = 1;              // スタートポジションは1固定
            this.goalPos = Sugoroku.Length;
        }
        
        public int BFSSearch()
        {
            this.InitVisitedArray();
            visitedArray[startPos] = startPos;

            // スタート位置をQueueに追加
            var queue = new Queue<Location>();
            queue.Enqueue(new Location(startPos,1));

            // ***1の場合の特別処理***
            if (startPos == goalPos)
            {
                return 1;
            }

            // Queueが0になるまでループ
            while (queue.Any())
            {
                var location = queue.Dequeue();

                // 移動先を計算
                int moveCnt = Convert.ToString(location.num, 2).ToCharArray().Where(c => c == '1').Count();
                int nextPlace = 0;

                foreach (move item in Enum.GetValues(typeof(move)))
                {
                    switch (item)
                    {
                        case move.Right:
                            nextPlace = location.num + moveCnt;
                            break;
                        case move.Left:
                            nextPlace = location.num - moveCnt;
                            break;
                    }

                    // 移動先が有効か、ゴールか等を判定
                    if (nextPlace < 1 || nextPlace > goalPos)
                    {
                        continue;
                    }

                    if (visitedArray[nextPlace] > 0)
                    {
                        continue;
                    }

                    // ゴールならキューに追加、ループを抜ける
                    if (nextPlace == goalPos)
                    {
                        return location.count + 1;
                    }

                    // 移動先が有効ならキューに追加
                    visitedArray[nextPlace] = location.num;
                    queue.Enqueue(new Location(nextPlace, location.count + 1));

                }
            }
            
            return -1;
        }
        
        private void InitVisitedArray()
        {
            this.visitedArray = Enumerable.Repeat(-1, this.visitedArray.Length).ToArray();
        } 



    }

    public class Location
    {
        public int __location;
        public int num { get; set; }
        public int count { get; set; }
        public Location(int num, int count)
        {
            this.num = num;
            this.count = count;
        }        
    }
}