A few hours later you're lucky to participate in this remarkable Codeforces Round #27 for Div. 21 participants, but traditionally the others can take part out of the competition.
It has been prepared by a small band of authors: me (NALP), Igor Kudryashov (KudryashovIA), and Pavel Kholkin (HolkinPV). There were Gerald Agapov (Gerald), Maria Belova (Delinur) and Mike Mirzayanov (MikeMirzayanov) with us as always.
It’s well-known that you can participate in this Round into competition only today! There won’t be another Codeforces Round #27!
Traditionally I wish good luck, accepted solutions and successful hacking attempts for you!
UPD: Points are standard: 500, 1000, 1500, 2000, 2500.
UPD: Round is over, thanks to all! We hope you have got a fun. Don't forget, system testing will be soon.