Codeforces Round #905 (Div. 1, Div. 2, Div. 3)

Revision en10, by 74TrAkToR, 2023-10-22 17:35:37

Hello, Codeforces!

We are happy to invite you to our experimental round for three divisions, which will take place at Oct/22/2023 14:05 (Moscow time). Please note the non-standard start time for the round. Each division will have 5-7 tasks. The round will be held according to the Codeforces rules and will be rated for all three divisions. A few changes regarding the ratings of participants in this competition:

  • In Div.3 the rating of participants is less than 1600.
  • In the Div.2 ranking, participants range from 1600 to 2099.
  • In Div.1 the rating of participants is no less than 2100.
  • Please note that after Codeforces Round 904 (Div. 2) the rating will not be recalculated until the end of this competition.

Let us note that two team Olympiads will be held in parallel on this day and the rounds are based on their tasks:

  • XXI Moscow Team Olympiad, high school students competition based in Moscow that is an elimination contest for All-Russian Team Olympiad.
  • III Open Team Olympiad UMSh in programming.

We would like to thank everyone who helped me a lot with round preparation.

We wish you good luck and high rating!

UPD: One of the problems will be interactive, so please read guide for interactive problems before the contest.

UPD: Score distribution:

  • Div.3: $$$500-1000-1500-1750-2500-2750-(1750+2000)$$$
  • Div.2: $$$250-500-1000-(750+1250)-2250-2750$$$
  • Div.1: $$$(250+500)-750-1000-1250-2000-2750$$$

UPD: Editorial

UPD: We will retest the solutions to the problem div3F and div2C. This may make minor changes, the rating will be recalculated later.

UPD: Retesting took several minutes. Now all the results are correct :)

History

 
 
 
 
Revisions
 
 
  Rev. Lang. By When Δ Comment
en10 English 74TrAkToR 2023-10-22 17:35:37 79
ru11 Russian 74TrAkToR 2023-10-22 17:35:13 87
ru10 Russian 74TrAkToR 2023-10-22 17:27:14 131
en9 English 74TrAkToR 2023-10-22 17:26:20 141
en8 English 74TrAkToR 2023-10-22 16:15:32 64
ru9 Russian 74TrAkToR 2023-10-22 16:13:48 61
en7 English Artyom123 2023-10-22 14:52:39 87
ru8 Russian Artyom123 2023-10-22 14:52:06 87
en6 English Artyom123 2023-10-22 14:17:29 205
ru7 Russian Artyom123 2023-10-22 14:16:19 205 Мелкая правка: ':Mr.kolya] за качес' -> ':Mr.kolya], [user:kevinxiehk] за качес'
en5 English Artyom123 2023-10-22 01:29:47 53 Tiny change: '0$</li>\n<' -> '0$</li>\n<li>Div.1: $(250+500)-750-1000-1250-2000-2750$</li>\n<'
ru6 Russian Artyom123 2023-10-22 01:29:29 53 Мелкая правка: '0$</li>\n<' -> '0$</li>\n<li>Div.1: $(250+500)-750-1000-1250-2000-2750$</li>\n<'
en4 English 74TrAkToR 2023-10-21 19:59:46 193
ru5 Russian 74TrAkToR 2023-10-21 19:59:13 186
en3 English Artyom123 2023-10-21 14:15:13 162
ru4 Russian Artyom123 2023-10-21 14:14:08 176
en2 English Artyom123 2023-10-21 14:02:37 28 Tiny change: '023-10-19]' -> '023-10-19], [user:Dmitry07,2023-10-19]'
ru3 Russian Artyom123 2023-10-21 14:00:59 28 Мелкая правка: '023-10-19]' -> '023-10-19], [user:Dmitry07,2023-10-19]'
en1 English 74TrAkToR 2023-10-20 20:02:15 2607 Initial revision for English translation
ru2 Russian 74TrAkToR 2023-10-20 19:51:15 405 Мелкая правка: 'ов меньше 1600. </li>\n<' -> 'ов меньше $1600$. </li>\n<' (опубликовано)
ru1 Russian 74TrAkToR 2023-10-20 19:42:37 2196 Первая редакция (сохранено в черновиках)