My solution for this input:
5
4 0
3 0
5 0
5 0
0

print 0-2-210
It's wrong answer, but my solution is AC :)

1. And you are sure, what there there is such test?
2. Simply having added this test you receive WA, and someone is possible still.
It speaks that it is necessary simply to find a small mistake in your decision.

It's obviously that my solution needs correct, but in first i want to correct tests for this problem! And i wrote to the administration of site and get:

The original message was received at Sat, 30 Jun 2007 11:30:48 +0600
from f64.mail.ru [194.67.57.98]

   ----- The following addresses had permanent fatal errors -----
judge@busin.usu.ru
    (reason: 550 5.1.1 <judge@busin.usu.ru>... User unknown)
    (expanded from: <acm_support@acm.timus.ru>)

   ----- Transcript of session follows -----
.... while talking to busin.usu.ru.:
>>> DATA
<<< 550 5.1.1 <judge@busin.usu.ru>... User unknown
550 5.1.1 judge@busin.usu.ru... User unknown
<<< 503 5.0.0 Need RCPT (recipient)


I'm in confusion now :(

1. There are several administrators for this site. So the message above just tells that one of them (me) do not receive the message.

2. You may write one more time to contact e-mail as the problem with mail delivery is fixed already.

So do not feel confused. :)