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: 102ms
Memory: 24300kB
Author: ibmpc
In contest: 1122 
n=int(input())
k=0
while n !=1:
    if n % 2 ==0:
        n=n/2
    else:
        n=n*3+1
    k=k+1
print(k)