using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ForYukicoder
{
    class Program
    {
        static void Main(string[] args)
        {
            int N = int.Parse(Console.ReadLine());
            int count;

            count = (int)Math.Log(N, 2);
            int cookie = (int)(N % Math.Pow(2, count));

            if (cookie == 0)
            {

            }
            else if (cookie == 1 || cookie % 2 == 0)
            {
                count += 1;
            }
            else
            {
                count += 2;
            }

            Console.WriteLine(count);
        }
    }
}