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: 88ms
Memory: 24300kB
Author: szswzr
In contest: 1122 
a=int(input())
n=0
while a!=1:
    if a % 2==1:
        a=a*3+1 
    else:
        a=a/2

    n+=1
print(n)