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: 93ms
Memory: 24436kB
Author: jinger
In contest: 1122 
n = int(input())
step=0
while n!=1:
    if n % 2 == 0:
        n = n / 2
    else:
        n = n*3+1
    step +=1
print (step)