using System;
using System.Collections.Generic;

namespace yukicoder
{
    class _003
    {
        static void Main()
        {
            int n = int.Parse(Console.ReadLine());
            int[] dp = new int[n];
            dp[0] = 1;
            Queue<int> q = new Queue<int>();
            q.Enqueue(0);

            while (q.Count > 0)
            {
                int p = q.Dequeue();
                int m = bit(p + 1);

                for (int i = -m; i <= m; i += 2 * m)
                {
                    int t = p + i;
                    if (t > 0 && t < n
                        && dp[t] == 0)
                    {
                        dp[t] = dp[p] + 1;

                        if(t == n - 1)
                        {
                            q.Clear();
                            continue;
                        }
                        q.Enqueue(p + i);
                    }
                }
            }

            if (dp[n - 1] != 0)
            {
                Console.WriteLine(dp[n - 1]);
            }
            else
            {
                Console.WriteLine("-1");
            }
            Console.ReadLine();
        }

        static int bit(int n)
        {
            int ret = 0;
            while (n > 0)
            {
                n &= n - 1;
                ret++;
            }

            return ret;
        }
    }
}