Codeforces Round #879 (Div. 2, based on All-Russian olympiad in the name of Keldysh) [Rated]

Правка en13, от Artyom123, 2023-06-18 13:15:57

Hi!

This Sunday will take place All-Russian olympiad for students of 5-8 grades, in the name of Keldysh. Good luck to all the participants! This contest is prepared by Moscow Olympiad Scientific Committee that you may know by Moscow Team Olympiad, Moscow Olympiad for Young Students, Moscow Open Olympiad in Informatics (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, 857).

We are happy to announce Codeforces Round 879 (Div. 2) based on the problems of this olympiad! It will be a Div. 2 round, which will take place at Jun/18/2023 11:05 (Moscow time). Please notice the unusual time. You will have 6 problems and 2 hours to solve them.

We kindly ask all the community members that are going to participate in the competition to show sportsmanship by not trying to cheat in any manner, in particular, by trying to figure out problem statements from the onsite participants. If you end up knowing some of the problems of All-Russian olympiad in the name of Keldysh (by participating in it, from some of the onsite contestants or in any other way), please do not participate in the round. We also ask onsite contestants to not discuss problems in public. Failure to comply with any of the rules above may result in a disqualification.

Problems of this competition were prepared by grphil, Mangooste, sevlll777, Siberian, TeaTime, teraqqq, Ziware, TheEvilBird, Ormlis, Alexdat2000, vaaven, Mikhango, Artyom123 guided by Ormlis, grphil and Helen Andreeva.

Thanks to Artyom123 for the round coordination, and also thanks to MikeMirzayanov for systems Codeforces and Polygon, which was used to prepare problems of this olympiad.

Great thanks to the testers of the round: PurpleCrayon, He_Ren, feecIe6418, penguinhacker, ix35, Dominater069, MagicalFlower, tzc_wk, gyh20, ezraft, Kieray, AquaMoon, satori_____, njupt_lyy, Mike4235, ak2006, Lavine, Ritwin, xiaossr, turmax, fastmath, Kapt, Kirill22, Be_dos, Olerinskiy, gmusya, blyat, vsinitsynav, orz, TheGoodest, playerr17, lesssia.

UPD: Scoring distribution:

500 – 1000 – 1250 – 1750 — 2500 – 3000

Good luck everybody!

История

 
 
 
 
Правки
 
 
  Rev. Язык Кто Когда Δ Комментарий
ru13 Русский Ormlis 2023-06-18 15:28:48 396
en15 Английский Ormlis 2023-06-18 15:27:58 389
ru12 Русский Ormlis 2023-06-18 14:26:28 68
en14 Английский Ormlis 2023-06-18 14:25:57 70
ru11 Русский Artyom123 2023-06-18 13:16:30 27 Мелкая правка: 'едставить Codeforces Round #879 на основе' -> 'едставить [contest:1834] на основе'
en13 Английский Artyom123 2023-06-18 13:15:57 31
ru10 Русский Artyom123 2023-06-17 22:25:09 97
en12 Английский Artyom123 2023-06-17 22:23:46 82
ru9 Русский Artyom123 2023-06-17 19:25:26 12 Мелкая правка: ':TheGoodes], [user:p' -> ':TheGoodest], [user:p'
en11 Английский Artyom123 2023-06-17 19:25:15 12 Tiny change: ':TheGoodes], [user:p' -> ':TheGoodest], [user:p'
en10 Английский Artyom123 2023-06-17 19:24:40 339
ru8 Русский Artyom123 2023-06-17 19:24:25 339
en9 Английский Artyom123 2023-06-17 18:44:46 578
ru7 Русский Artyom123 2023-06-17 18:44:13 567
ru6 Русский Ormlis 2023-06-17 12:21:24 0 (опубликовано)
en8 Английский Ormlis 2023-06-17 12:20:47 0 (published)
en7 Английский Ormlis 2023-06-17 12:20:28 132
ru5 Русский Ormlis 2023-06-17 12:20:16 149
en6 Английский Ormlis 2023-06-17 11:50:26 11 Tiny change: 'd 2 hours 30 minutes to solve' -> 'd 2 hours to solve'
ru4 Русский Ormlis 2023-06-17 11:50:08 9 Мелкая правка: ' и 2 часа 30 минут на их реш' -> ' и 2 часа на их реш'
en5 Английский vaaven 2023-06-17 11:48:11 3 Tiny change: 'so thanks for [user:Mik' -> 'so thanks to [user:Mik'
en4 Английский vaaven 2023-06-17 11:38:12 1 Tiny change: 'solve them\n\n**We k' -> 'solve them.\n\n**We k'
en3 Английский vaaven 2023-06-17 11:37:58 6 Tiny change: 'will be a будет Div. 2 ro' -> 'will be a Div. 2 ro'
en2 Английский vaaven 2023-06-17 11:37:30 3 Tiny change: '</a>).\n\nМы We are hap' -> '</a>).\n\nWe are hap'
en1 Английский vaaven 2023-06-17 11:35:56 3875 Initial revision for English translation (saved to drafts)
ru3 Русский vaaven 2023-06-17 11:21:05 9 Мелкая правка: 'ревнования в Москве. Если вы ' -> 'ревнования. Если вы '
ru2 Русский Ormlis 2023-06-17 11:16:20 30
ru1 Русский Ormlis 2023-06-16 19:51:14 3850 Первая редакция (сохранено в черновиках)