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: 97ms
Memory: 24300kB
Author: Jane
In contest: 1122 
a=int(input())
n=0
while a>1:
 if a%2==0:
    a/=2
 else:
    a = a*3+1
 n+=1
print(n)