using System;
using System.Collections.Generic;

namespace Problem003
{
    class Program
    {
        static void Main(string[] args)
        {
            var n = int.Parse(Console.ReadLine());
            Console.WriteLine(Process(n, 1, new HashSet<int>()));
        }

        static int Process(int n, int pos, HashSet<int> db, int depth = 1)
        {
            if (db.Contains(pos)) return -1;
            db.Add(pos);

            if (pos == n) return depth;

            var steps = Count1(pos);

            // 前に移動
            var next = pos + steps;
            if (next <= n) {
                var ans = Process(n, next, db, depth + 1);
                if (ans > 0) return ans;
            }
            // 後ろに移動
            next = pos - steps;
            if (next > 1) {
                var ans = Process(n, next, db, depth + 1);
                if (ans > 0) return ans;
            }
            return -1;
        }

        static int Count1(int v)
        {
            var count = 0;
            while (v != 0)
            {
                if ((v & 1) == 1) count++;
                v >>= 1;
            }
            return count;
        }
    }
}