OJ Board

I am one of the judges at NEERC http://neerc.ifmo.ru and we always publish test data after the contest. Although marked unofficial, it is actulally always a real contest data and we are actively discussing the possibility to finally take a full responsibility for the data.

Starting this year, we ...

There is already topic on this problem, but it seems full of flame...

Well, actually I have accidently solved the problem and I must note that there must be the mistake in the judges' solution.

Everybody thinks that the problem is in T4 because the picture has a small ambiguity in "three ...