using System;
using System.IO;
using System.Linq;
using System.Text;
using System.Collections.Generic;
using Enu = System.Linq.Enumerable;
using System.Numerics;

class Program
{
    static readonly int INF = (int)1e9, MaxN = 10000;

    public void Solve()
    {
        int N = Reader.Int();
        if (N == 1) { Console.WriteLine(1); return; }
        var dp = Enu.Repeat(INF, MaxN + 1).ToArray();
        dp[1] = 1;
        var que = new Queue<int>();
        que.Enqueue(1);
        Predicate<int> IsInside = x => x >= 1 && x <= N;

        while (que.Count > 0)
        {
            int pos = que.Dequeue();
            int bits = BitCount(pos);
            for (int d = -1; d <= 1; d += 2)
            {
                int next = pos + d * bits;
                if (IsInside(next) && dp[pos] + 1 < dp[next])
                {
                    if (next == N) { Console.WriteLine(dp[pos] + 1); return; }
                    dp[next] = dp[pos] + 1;
                    que.Enqueue(next);
                }
            }
        }

        Console.WriteLine(-1);
    }

    int BitCount(long x) { return x == 0 ? 0 : 1 + BitCount(x & x - 1); }


}

class Entry { static void Main() { new Program().Solve(); } }
class Reader
{
    private static TextReader reader = Console.In;
    private static readonly char[] separator = { ' ' };
    private static readonly StringSplitOptions op = StringSplitOptions.RemoveEmptyEntries;
    private static string[] A = new string[0];
    private static int i;
    private static void Init() { A = new string[0]; }
    public static void Set(TextReader r) { reader = r; Init(); }
    public static void Set(string file) { reader = new StreamReader(file); Init(); }
    public static bool HasNext() { return CheckNext(); }
    public static string String() { return Next(); }
    public static int Int() { return int.Parse(Next()); }
    public static long Long() { return long.Parse(Next()); }
    public static double Double() { return double.Parse(Next()); }
    public static int[] IntLine() { return Array.ConvertAll(Split(Line()), int.Parse); }
    public static int[] IntArray(int N) { return Enu.Range(0, N).Select(i => Int()).ToArray(); }
    public static int[][] IntTable(int H) { return Enu.Range(0, H).Select(i => IntLine()).ToArray(); }
    public static string[] StringArray(int N) { return Enu.Range(0, N).Select(i => Line()).ToArray(); }
    public static string Line() { return reader.ReadLine().Trim(); }
    private static string[] Split(string s) { return s.Split(separator, op); }
    private static string Next() { CheckNext(); return A[i++]; }
    private static bool CheckNext()
    {
        if (i < A.Length) return true;
        string line = reader.ReadLine();
        if (line == null) return false;
        if (line == "") return CheckNext();
        A = Split(line);
        i = 0;
        return true;
    }
}