XVIII Open Olympiad in Informatics (Unrated, Online Mirror, IOI rules)

Revision en12, by Ormlis, 2024-03-06 14:34:27

Hi everybody,

In a few days there will be a Moscow Open Olympiad. This olympiad is prepared by Moscow Olympiad Scientific Committee that you may know by Moscow Olympiad in Programming, Moscow Team Olympiad, and Megapolis Olympiad (rounds 327, 342, 345, 376, 401, 433, 441, 466, 469, 507, 516, 541, 545, 567, 583, 594, 622, 626, 657, 680, 704, 707, 727, 751, 775, 802, 829, 852).

The Open Olympiad consists of the most interesting and difficult problems proposed by our authors' team. Therefore, we decided to conduct a non-rating mirror of the Olympiad on Codeforces. The Olympiad takes place in two rounds, each consisting of $$$4$$$ problems, not ordered by difficulty, and $$$5$$$ hours to solve them. Each problem is worth $$$100$$$ points that are distributed into multiple subtasks with different constraints that allow the participant to earn partial score. Testing is done in the IOI format, where the participant receives a full testing report on all tests in the Online-subtasks during the competition. The feature of the Open Olympiad is that some problems have Offline-subtasks, the results of which will only be available after the end of the competition.

The competition problems were created and prepared by Mangooste, vaaven, Tikhon228, ViktorSM, isaf27, TheEvilBird, sevlll777, Papaz239 и pakhomovee guided by Ormlis, grphil and Helen Andreeva.

The mirror on Codeforces will take place in Mar/08/2024 12:05 (Moscow time) and Mar/09/2024 12:05 (Moscow time).

Special thanks to MikeMirzayanov for the codeforces and polygon systems, which were used in preparing the problems for this Olympiad.

Many thanks to the Olympiad testers: dshindov, FelixDzerzhinsky, Adikolon, isaf27, adepteXiao, talant, AgafonovArtem, Dart-Xeyter, inhabitant, Kapt, Siberian, alexashkins, alexxela12345, Sweezy, v0s7er, MOHOXPOM, Titoffifee.

Good luck!

History

 
 
 
 
Revisions
 
 
  Rev. Lang. By When Δ Comment
en16 English Artyom123 2024-03-09 18:40:19 111
ru11 Russian Artyom123 2024-03-09 18:39:15 117
en15 English Artyom123 2024-03-09 18:36:18 111
ru10 Russian Artyom123 2024-03-09 18:35:31 117
en14 English Artyom123 2024-03-08 17:59:16 110
ru9 Russian Artyom123 2024-03-08 17:58:10 113
en13 English Artyom123 2024-03-06 18:16:16 147
ru8 Russian Artyom123 2024-03-06 18:14:40 134
ru7 Russian Ormlis 2024-03-06 14:34:37 0 (опубликовано)
en12 English Ormlis 2024-03-06 14:34:27 0 (published)
en11 English Ormlis 2024-03-06 14:15:58 2 Tiny change: '7">852</a>, ).\n\nThe ' -> '7">852</a>).\n\nThe '
en10 English Ormlis 2024-03-06 14:14:34 92
ru6 Russian Ormlis 2024-03-06 14:13:35 80 Мелкая правка: 'odeforces пройдёт в [contest_' -> 'odeforces состоится [contest_'
en9 English Ormlis 2024-03-06 04:23:14 18 Tiny change: '24-03-05] under the guidance of [user:Orm' -> '24-03-05] guided by [user:Orm'
en8 English Ormlis 2024-03-06 04:22:07 23
en7 English Ormlis 2024-03-06 04:21:23 100
en6 English Ormlis 2024-03-06 04:18:49 42
en5 English vaaven 2024-03-06 01:27:20 34
en4 English Ormlis 2024-03-06 00:42:25 226
en3 English Artyom123 2024-03-06 00:34:26 14
ru5 Russian Artyom123 2024-03-06 00:34:12 73
en2 English Artyom123 2024-03-06 00:33:30 78
en1 English vaaven 2024-03-05 23:24:21 3637 Initial revision for English translation (saved to drafts)
ru4 Russian Ormlis 2024-03-05 23:20:18 320
ru3 Russian Ormlis 2024-03-05 21:48:20 401
ru2 Russian Ormlis 2024-03-05 21:13:27 40
ru1 Russian Ormlis 2024-03-05 21:11:10 4016 Первая редакция (сохранено в черновиках)