2874

[Carlos]

We've deleted some tricky test cases that asked for a precision error lower than 1e-16. We've also added some more test cases to judge's input.

Thanks to [u][i][b]Pier Paolo Guill

[Carlos]

We've found something strange for this problem. If you want to help us finding the right solution, please send your code to problemset@acm.uva.es.

Thanks.

[Carlos]

We still need help on looking for this problem's bug. If you've tried to solve it and you always get WA, please contact us at problemset@acm.uva.es and send us your source code.