The upcoming contest is brought to you by me. My name is Arthur, I'm a student of Chelyabinsk lyceum 31.
I am glad to thank Gerald for contest preparation management, Delinur for translation of statements, MikeMirzayanov for a really excellent system, dolphinigle for test-solving, proof-reading and much valuable advice, fdoer, grey_wind, Skird and alger95 for help in problem development.
There is nothing more to say yet. As you can see, contest will be held in two divisions separately. The scoring system will be standard (not dynamic), but scores for tasks may be unusual (see update of this post).
There won't be volume stories. I hope you will like the contest and its problemset and everything will be OK.
UPD: Scores for tasks:
Division 1: 500-1000-2000-2000-2500
Division 2: 500-1000-1500-2000-3000
Congrats to winners =)
UPD3 some part of English editoral posted. You will find the remaining part of the editorial later
UPD4 English editoral was completed.