Codeforces Round #763 (Div. 2)

Hello, Codeforces!

I am really excited to invite you to Codeforces Round 763 (Div. 2) on Dec/28/2021 16:35 (Moscow time)! The start time is unusual, so please pay attention.

All the problems were authored and prepared by me. I would like to give special thanks to everyone who made this round possible:

KAN for excellent coordination with a lot of valuable advice!
KAN again for translation of statements!
tdpencil, Stepavly, Supermagzzz, minhcool, snowysecret, generic_placeholder_name, QuangBuiCPP, thenymphsofdelphi, PurpleCrayon, xuanquang1999, vinfat, hieplpvip, tourist, Lihwy, flamestorm for testing and valuable feedback!
MikeMirzayanov for great Codeforces and Polygon platforms!
You, for participating!

The round consists of 5 problems and you have 2 hours to solve them.

Wish you good luck and high ratings!

UPD0: The score distribution 500 — 1000 — 1750 — 2500 — 2750.

UPD1: Congratulation to the winners of the round!

Hope that you guys enjoy the rounds, and thank you again for participating! <3

Rev.	By	When	Δ	Comment
en6	darkkcyan	2021-12-29 00:50:21	78	Add the editorial.
en5	darkkcyan	2021-12-28 21:46:05	517	Tiny change: '!\n\n##### Div.' -> '!\n\n###### Div.'
en4	darkkcyan	2021-12-28 14:25:07	96	Add score distribution.
en3	darkkcyan	2021-12-27 11:15:22	67	Add thenymphsofdelphi and flamestorm to the list of testers.
en2	darkkcyan	2021-12-27 01:39:55	3	Tiny change: 's to every who made ' -> 's to everyone who made '
en1	darkkcyan	2021-12-27 01:37:01	1122	Initial revision (published)

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en6