using System;
using System.Collections.Generic;

namespace No3_1{
    public class Program{
        private static List<int> stack = new List<int>();
        public static void Main(string[] args){
            var result = Function(int.Parse(Console.ReadLine()), 1, 1);
            if(result == int.MaxValue) result = -1;
            Console.WriteLine(result);
        }

        public static int Function(int input, int place, int cnt){
            if(place == input) return cnt;
            if(cnt >= input || stack.Contains(place) || place < 1 || input < place) return int.MaxValue;
            stack.Add(place);
            var result = Math.Min(Function(input, place + BitOne(place), cnt + 1), Function(input, place - BitOne(place), cnt + 1));
            return result;
        }

        public static int BitOne(int num){
            var result = 0;
            while(true){
                if(num % 2 == 1) result++;
                if((num /= 2) == 0) break;
            }
            return result;
        }
    }
}