Codeforces Global Round 18

Revision en8, by PurpleCrayon, 2021-12-24 20:50:00

Happy Holidays!

On Dec/24/2021 17:35 (Moscow time) we will host Codeforces Global Round 18.

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

The presents 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 presents 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 the hard-working elves Monogon, BledDest, and PurpleCrayon.

We would like to thank the everyone who made this round possible:

You will have 2.5 hours to solve 8 problems.

UPD: The scoring distribution: 250 — 1000 — 1750 — 2250 — 2750 — 3000 — 3750 — 4000

UPD: Editorial is out!

Good luck, have fun, and stay off the naughty list!

History

 
 
 
 
Revisions
 
 
  Rev. Lang. By When Δ Comment
en8 English PurpleCrayon 2021-12-24 20:50:00 73
en7 English PurpleCrayon 2021-12-23 21:06:42 124
en6 English PurpleCrayon 2021-12-23 09:17:15 42
en5 English PurpleCrayon 2021-12-22 21:57:55 0 (published)
en4 English PurpleCrayon 2021-12-22 21:57:29 23 Tiny change: '2], [user:KAN,2021-12-22], [user:' -> '2], [user:'
en3 English PurpleCrayon 2021-12-22 21:48:05 120
en2 English PurpleCrayon 2021-12-22 21:43:50 122 Tiny change: 'ortly.\n\n' -> 'ortly.\n\nGood luck, have fun, and stay off the naughty list!\n'
en1 English PurpleCrayon 2021-12-22 21:29:04 2149 Initial revision (saved to drafts)