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: 80ms
Memory: 24300kB
Author: zql
In contest: 1122 
a=int(input())
n=0
while a!=1:
   if a%2==0:
      a=a/2
      n+=1
   else:
      a=a*3+1
      n+=1
print(n)