using System;

class yukicoder
{
    static void Main(string[] args)
    {
        var r = new Reader();
        var N = r.nextInt();
        Console.WriteLine(N % 2 != 0 ? calc(N) + 1 : calc(N));

    }

    static int calc(int n)
    {
        if (n != 1 )
        {
            return calc(n / 2) + 1;
        } else
        {
            return 0;
        }
    }
}

class Reader
{
    string[] s;
    int i;
    char[] cs = new char[] { ' ' };

    public Reader()
    {
        s = new string[0];
        i = 0;
    }

    public string next()
    {
        if ( i < s.Length )
            return s[i++];
        var input = Console.ReadLine();
        while ( input == "" )
            input = Console.ReadLine();
        s = input.Split(cs, StringSplitOptions.RemoveEmptyEntries);
        i = 0;
        return next();
    }

    public int nextInt()
    {
        return int.Parse(next());
    }

}