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: 98ms
Memory: 24300kB
Author: fyshi
In contest: 1122 
n = int(input())

j = 0
while n !=1:
    j = j + 1
    if n % 2 == 0:
        n = n /2
    else:
        n = n * 3 + 1
print(j)