在oj上运行以下代码 报错如下:
4.2 10.1 2.4
Traceback (most recent call last):
File "step2/run.py", line 4, in
a = int(input())
EOFError: EOF when reading a line
求问为啥会出现这个EOFerror
```python
CD = 0.4
ruo = 1.2
m = 0.43
g = 9.81
A = 121 * (0.0001) *pi
a = input()
a = ((int(a)*1000)/3600)
list = [a]
i=a
def test(i):
fd = (0.5 * CD * ruo * A * i**2)
fg = m *g
i = fd/fg
print('{:.1f} {:.1f} {:.1f}'.format(fg,fd,i))
test(i)
```