using System.Collections.Generic;
using System;

public class P
{
    public int a { get; set; }
    public int times { get; set; }
}

public class Hello
{
    public static void Main()
    {
        var n = int.Parse(Console.ReadLine().Trim());
        var ans = getA(n);
        Console.WriteLine(ans);
    }
    public static int getA (int n)
    {
        var q = new Queue<P>();
        q.Enqueue(new P { a = n, times = 0 });
        while (true)
        {
            var w = q.Dequeue();
            if (w.a == 1) return w.times;
            if (w.a % 2 == 0)
            {
                q.Enqueue(new P { a = w.a / 2, times = w.times + 1 });
                q.Enqueue(new P { a = w.a  + 1, times = w.times + 1 });
            }
            else q.Enqueue(new P { a = w.a + 1, times = w.times + 1 });
        }
    }
}