Codeforces Round #630 (Div. 2)

Revision en22, by triple__a, 2020-04-01 05:47:55

Hello Codeforces!

I am glad to invite you to my first official round Codeforces Round #630 (Div. 2), which will take place on Mar/31/2020 16:35 (Moscow time) (please note for the unusual starting time) and will be rated for all Division 2 participants.

You will be given 7 tasks and 150 minutes to solve them.

All tasks in this round were prepared by me. Hope that you will enjoy those tasks!

I would like to thank:

To avoid queueforces, we will provide small amount but strong (hope so) pretests for first few tasks. Hope it works!

Score distribution will be announced later.

Good luck and have fun!

UPD1: Score distribution: 500-1000-1250-1250-1750-2250-3000

UPD2: Contest is over, and here is the editorial.

UPD3:

I am sorry that pretests were not as strong as I excepted.

Congratulations to the winners:

div1+div2:

  1. vepifanov

  2. xyz32768

  3. PinkRabbit

  4. 300iq

  5. nuip

div 2:

  1. xyz32768

  2. sorry_to_tourist

  3. camilla

  4. jerome_wei

  5. [user: _dawn]

people who were first to solve each task:

A: wangjunrui

B: MagentaCobra

C: okwedook

D: wangjunrui

E: GsjzTle

F: yooooooooo

G: GoGooLi

Lastly, thanks to Handsome2004 for the brilliant hack of E.

History

 
 
 
 
Revisions
 
 
  Rev. Lang. By When Δ Comment
en22 English triple__a 2020-04-01 05:47:55 4 (published)
en21 English triple__a 2020-04-01 05:47:17 847 (saved to drafts)
en20 English triple__a 2020-03-31 19:33:34 0 Tiny change: ' editorial.\n' -> ' editorial\n' (published)
en19 English triple__a 2020-03-31 19:33:14 98 (saved to drafts)
en18 English triple__a 2020-03-31 11:50:40 2 Tiny change: '250-3000\n' -> '250-3000\n\n'
en17 English triple__a 2020-03-31 11:49:51 65
en16 English triple__a 2020-03-30 12:14:19 0 (published)
en15 English triple__a 2020-03-30 12:12:08 94
en14 English triple__a 2020-03-29 18:22:28 20
en13 English triple__a 2020-03-29 13:39:11 25 Tiny change: '9], [user:S' -> '9], [user:Amori], [user:S'
en12 English triple__a 2020-03-29 13:03:41 4 Tiny change: 'for first tasks. Ho' -> 'for first few tasks. Ho'
en11 English triple__a 2020-03-29 13:02:51 24 Tiny change: 'te you to [contest:' -> 'te you to my first official round [contest:'
en10 English triple__a 2020-03-29 13:02:11 16 Tiny change: 'tasks and tasks and point distribut' -> 'tasks and score distribut'
en9 English triple__a 2020-03-29 09:26:39 4
en8 English triple__a 2020-03-29 09:25:42 48
en7 English triple__a 2020-03-29 09:18:26 82
en6 English triple__a 2020-03-29 09:16:48 20 Tiny change: 'orces, we provide s' -> 'orces, we will provide s'
en5 English triple__a 2020-03-29 09:14:22 6
en4 English triple__a 2020-03-29 09:13:06 9 Tiny change: 'o thank:\n- [user:' -> 'o thank:\n\n- [user:'
en3 English triple__a 2020-03-29 09:12:10 988
en2 English triple__a 2020-03-29 08:53:27 116 Tiny change: 'aaa' -> ''
en1 English triple__a 2020-03-29 08:50:22 6 Initial revision (saved to drafts)