import java.io.*;
import java.util.*;


public class Main_yukicoder642_1 {

	private static Scanner sc;
	private static Printer pr;

	private static void solve() {
		int n = sc.nextInt();

		Map<Long, Integer> dp = new HashMap<>();
		dp.put((long)n, 0);
		Queue<Long> q = new ArrayDeque<>();
		q.add((long)n);
		while (!q.isEmpty()) {
			long e = q.remove();

			if (e == 1) {
				pr.println(dp.get(e));
				return;
			}

			if (e > 1) {
				if (e % 2 == 0 && !dp.containsKey(e / 2)) {
					q.add(e / 2);
					dp.put(e / 2, dp.get(e) + 1);
				}
				if (!dp.containsKey(e + 1)) {
					q.add(e + 1);
					dp.put(e + 1, dp.get(e) + 1);
				}
			}
		}
	}

	// ---------------------------------------------------
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		pr = new Printer(System.out);

		solve();

		pr.close();
		sc.close();
	}

	private static class Printer extends PrintWriter {
		Printer(PrintStream out) {
			super(out);
		}
	}
}