Start: Apr, 17, 2017 10:00:00
Python程序设计基础培训第二次作业
End: Apr, 23, 2017 14:00:00
Time elapsed:
Time remaining:
Problem_ID: B
Result: Accepted
Time: 130ms
Memory: 21432kB
Author: 18057153766
In contest: 1086 
n=int(raw_input())
c=0
while n>1:
     if n%2==0:
        n/=2
     else:
        n=n*3+1
     c+=1
print c