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: 102ms
Memory: 24300kB
Author: huangchongding
In contest: 1122 
n=int(input())
i=0
while n!=1 :
 if n%2==0:
   n=n/2
 else:
   n=n*3+1
 i+=1
print(i)