Welcome to the last Codeforces Round of 2014, Good Bye 2014! This round is very unusual; First, the round starts at December 30th, 18:00 MSK. Second, the round lasts for 2.5 hours. And lastly, the round will be division combined, which means Div1 contestants and Div2 contestants won't be separated.
The problems are prepared by me (.o.) and Seunghyun Jo (ainta). This is our second round at Codeforces. Because our first round caused(?) the Black Day, we hope this round won't cause any errors like before :D
Thanks to Won-seok Yoo(ainu7), who tested our round and gave us comments about the problemset.
We'd like to thank some people who were necessary to make this round: Maxim Akhmedov (Zlobober) gave us great help preparing the problems. Maria Belova (Delinur) translated problem statements in Russian. Mike Mirzayanov (MikeMirzayanov) made Codeforces and Polygon systems, which are really great. Let's give them an applause!
The score distribution will be posted just before the round starts, as usual.
We wish you all the best of luck. Happy New Year!
UPD (2014-12-30 17:33:21) The score for each problem is going to be 500-1000-1000-1500-2750-2750-3500. Thanks to Xellos for giving us some ideas.
UPD (2014-12-31 12:49:05) Round has finished, congratulations to the winners!
Also, thanks to Marcin_smu, who solved problem G after the contest for the first time.
UPD(2014-12-31 12:51:08) Editorial is published. Currently, only A-F is available, but I will add G as soon as possible. Sorry for the late editorial.
UPD(2015-01-02 21:30:44) I wrote the editorial of G. Sorry for the late update..