"Tryam" to everyone!
I am an authors of the today's contest. First of all I want to thank Artem Rakhov [RAD] (thanks to him, you'll understand my problems) and Maria Belova [Delinur] (those who know my English level will understand a huge of my thanks). Also thanks to everyone staff for the wonderful of the codeforces system. And also thanks to Sergei Tarasov [Seryi] and Andrey Tkachenko [Tkach1024] for ideas generating and testing.
Good luck and have fun.
Today, a breakdown of score will be slightly different from the standard - for the second division is 500-1000-2000-2000-2500 and 1000-1000-1500-2000-2500 for the first.
And one more, but certainly pleasant news - register ends exactly at the start of the round.
How it was.
At 19:35 Moscow time reported that in pretests for 123B - Squares have errors (a special thank to him). Indeed, a special case was not considered (a = 1, b! = 1 and symmetric to it). We have made decision to exclude tests covered by this case. There were a lot of such tests in pretests. Test generator has been fixed, and all tests were changed. After that all submits have been rejudged. As a result some submits with WA verdict could get the AC and vice versa.
What we have now.
We believe that the round should be rating. But if the situation with the problem 123B - Squares is strongly influenced to you, you can send an appeal with the evidence of this in the form of a personal message to RAD no later than 11pm on November 4. We can either do this round unrated for you or remove excess submits.
At the end of the system testing rating will be updated. If you have no appeals, it will be your final rating.
Sorry for the inconvenience.