Codeforces Global Round 17

Правка en3, от DeadlyCritic, 2021-11-20 18:16:38

Hello, Codeforces!

On 23.11.2021 17:35 (Московское время) we will host Codeforces Global Round 17.

It is the fifth round of a 2021 series of Codeforces Global Rounds. The rounds are open and rated for everybody.

The prizes for this round:

  • 30 best participants get a t-shirt.
  • 20 t-shirts are randomly distributed among those with ranks between 31 and 500, inclusive.
  • The prizes for the 6-round series in 2021:

In each round top-100 participants get points according to the table. The final result for each participant is equal to the sum of points he gets in the four rounds he placed the highest. The best 20 participants over all series get sweatshirts and place certificates. Thanks to XTX, which in 2021 supported the global rounds initiative!

The problems were written and prepared by shishin and Artyom123.

We would like to thank these people:

isaf27, the one who did a lot of things for the round to happen Shinchan01, Absyarka, Ziware, ijxjdjd, m371, Kotehok3, 221,physics0523, Igorbunov, kpw29, Kirill22, 1-gon, pashka for testing Kirill22 for submitting many different solutions 1-gon for being a VIP tester and his hilarious greetings in russian kpw29 for spending much time discussing the problems with me physics0523 for making researches about the tasks (as he always does) MikeMirzayanov for Codeforces and Polygon platforms and for his immeasurable contribution to the development of the community! You will have 2.5 hours to solve 8 problems. As always, we highly recommend reading all problems. Moreover, we really hope you upsolve the problems after the round, there are some interesting things to find out!

История

 
 
 
 
Правки
 
 
  Rev. Язык Кто Когда Δ Комментарий
en29 Английский DeadlyCritic 2021-11-24 03:57:55 67
en28 Английский AliShahali1382 2021-11-23 17:28:56 4
en27 Английский DeadlyCritic 2021-11-23 17:28:00 133
en26 Английский DeadlyCritic 2021-11-23 17:26:35 0 (published)
en25 Английский DeadlyCritic 2021-11-23 17:25:32 101 Reverted to en21
en24 Английский DeadlyCritic 2021-11-23 17:24:37 49
en23 Английский DeadlyCritic 2021-11-23 17:23:48 42
en22 Английский DeadlyCritic 2021-11-23 17:23:09 76 (saved to drafts)
en21 Английский AliShahali1382 2021-11-22 21:09:38 13 Tiny change: '021-11-20]و [user:moh' -> '021-11-20], [user:moh' (published)
en20 Английский AliShahali1382 2021-11-22 21:08:55 26 Tiny change: '021-11-20].\n<li> a' -> '021-11-20]و [user:mohammad_rastegar].\n<li> a' (saved to drafts)
en19 Английский AliShahali1382 2021-11-22 14:44:56 33 Tiny change: 'ser:aarr],[user:Pars' -> 'ser:aarr], [user:Pars'
en18 Английский AmShZ 2021-11-21 19:51:49 3
en17 Английский AmShZ 2021-11-21 19:51:03 25 Tiny change: '21-11-20], [user:nor' -> '21-11-20],[user:Parsa84] [user:nor'
en16 Английский AmShZ 2021-11-21 19:49:37 26 Tiny change: '0], [user:Parsa84, 2021-11-20][user:nor,' -> '0], [user:nor,'
en15 Английский AmShZ 2021-11-21 19:48:21 26 Tiny change: '0], [user:nor,' -> '0], [user:Parsa84, 2021-11-20][user:nor,'
en14 Английский AliShahali1382 2021-11-21 01:46:25 0 (published)
en13 Английский AliShahali1382 2021-11-21 01:45:29 63
en12 Английский AliShahali1382 2021-11-21 01:44:12 31 Tiny change: '21-11-20], [user:prab' -> '21-11-20],[user:ArshiaDadras] ,[user:prab'
en11 Английский AliShahali1382 2021-11-20 20:06:59 70
en10 Английский AliShahali1382 2021-11-20 19:53:20 70
en9 Английский AliShahali1382 2021-11-20 19:46:48 889
en8 Английский AliShahali1382 2021-11-20 19:14:04 669
en7 Английский AliShahali1382 2021-11-20 18:39:47 256
en6 Английский AliShahali1382 2021-11-20 18:33:05 320
en5 Английский AliShahali1382 2021-11-20 18:21:47 33
en4 Английский AliShahali1382 2021-11-20 18:19:17 37
en3 Английский DeadlyCritic 2021-11-20 18:16:38 97
en2 Английский AliShahali1382 2021-11-20 18:15:13 28
en1 Английский AliShahali1382 2021-11-20 18:12:35 1663 Initial revision (saved to drafts)