using System;
using System.Linq;
using System.Collections.Generic;
using System.Text;
using static System.Console;
using static System.Math;

class Program
{
    static int[] dp;
    static int N = 0;
    static void Main(string[] args)
    {
        N = int.Parse(ReadLine());
        dp = Enumerable.Repeat(1000000000, 10001).ToArray();
        dp[1] = 1;
        DFS(1);
        WriteLine(dp[N] == 1000000000 ? -1 : dp[N]);
    }
    static void DFS(int from)
    {
        int delta = 0;
        for (int j = 0; j < 32; j++)
            if (((from >> j) & 1) == 1)
                delta++;

        if(N >= from + delta && dp[from + delta] > dp[from] + 1)
        {
            dp[from + delta] = dp[from] + 1;
            DFS(from + delta);
        }

        if(1 <= from - delta && dp[from - delta] > dp[from] + 1)
        {
            dp[from - delta] = dp[from] + 1;
            DFS(from - delta);
        }
    }
}