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: 127ms
Memory: 21432kB
Author: 18367003035
In contest: 1086 
n=int(raw_input().strip())
i=0
while n>1:
	i=i+1
	if n%2==0:
		n=n/2
	else:
		n=n*3+1
print i