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: 121ms
Memory: 21432kB
Author: shanzhenyu
In contest: 1086 
d = int(raw_input().strip())
s=0
while d<>1:
	s+=1;
	if d%2==1:
		d=d*3+1
	else:
		d=d/2
print s