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: 83ms
Memory: 24436kB
Author: qingfengxiyu
In contest: 1122 
n=int(input())
i=0
while n>1:
     if n%2==0:
         n=n/2
         i=i+1
     else:
         n=n*3+1
         i=i+1
print(i)