WA 48. So strange...

I know that the task was rejudged.

I added the condition for new test, where A, B and C collinear: cos(ACB) - 1.0 < eps, where eps = 1e-8, then answer = AB, but I've still get WA 48. Give me a hint, please.

Thanks in advance.

Re: WA 48. So strange...

Now already accepted, I have found stupid bug in my code.

Ignore first message.

Re: WA 48. So strange...

And what bug did you found? Just like you I've added a condition for test:

2 4 0

3 6 0

0 0 0

3

The answer is not NaN now, but I still have WA48.

Re: WA 48. So strange...

Try cases when all points belongs to one axis only:

Case 1:

6 0 0

2 0 0

4 0 0

1

Case 2:

0 6 0

0 2 0

0 4 0

1

Case 3:

0 0 6

0 0 2

0 0 4

1

For all cases correct answer will be 4.51

Good luck!