Start: Nov, 12, 2017 10:00:00
2017秋Python程序设计基础培训第二次作业
End: Nov, 19, 2017 12:00:00
Time elapsed:
Time remaining:
Problem_ID: B
Result: Accepted
Time: 100ms
Memory: 24300kB
Author: zhuzhu
In contest: 1122 
n=int(input())
m=0
while n!=1:
  if n%2==0:
      n=n/2
  else:
      n=n*3+1
  m+=1
else:
    print(m)