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: 128ms
Memory: 21432kB
Author: 18958329966
In contest: 1086 
n=int(input())
c=0
while n!=1:
    if (n % 2)==0:
        n=n//2
    else:
        n=3*n+1
    c=c+1
print(c)