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: 115ms
Memory: 24436kB
Author: langley1031
In contest: 1122 
a=int(input())
c=0
while a!=1:
   c=c+1 
   if a%2==0 :
    a=a/2
   else:
    a=a * 3+1
print (c)