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: eboyhcf
In contest: 1122 
a=int(input())
k=0
while a!=1:
  if a%2==0:
     a=a//2
  else:
     a=a*3+1
  k=k+1
print(k)