using System;

namespace ConsoleApp6
{
    internal class Program
    {
        static void Main(string[] args)
        {
            double l = 0.1, d = 10;
            int cnt = 0;

            for(int i = 0; i <= 10; i++)
            {
                d *= 0.1;
            }

            while (l > d)
            {
                l /= 2; cnt++;
            }

            Console.WriteLine($"{cnt}");
        }
    }
}