import sys
sys.setrecursionlimit(5*10**5)
input = sys.stdin.readline
from collections import defaultdict, deque, Counter
from heapq import heappop, heappush
from bisect import bisect_left, bisect_right
from math import gcd

n = int(input())
cnt = 0

while n != 1:
  if n % 2 == 1:
    n += 1
  else:
    while n % 2 == 0:
      n //= 2
  cnt += 1

print(cnt)