Codeforces Round #774 (Div. 2)

#	User	Rating
1	tourist	3985
2	jiangly	3814
3	jqdai0815	3682
4	Benq	3529
5	orzdevinwang	3526
6	ksun48	3517
7	Radewoosh	3410
8	hos.lyric	3399
9	ecnerwala	3392
9	Um_nik	3392

#	User	Contrib.
1	cry	169
2	maomao90	162
2	Um_nik	162
4	atcoder_official	160
5	djm03178	158
6	-is-this-fft-	157
7	adamant	155
8	Dominater069	154
9	awoo	153
10	luogu_official	150

Hola Codeforces!

I am happy to invite you to Codeforces Round 774 (Div. 2), which will take place on 04.03.2022 18:35 (Московское время). Notice the unusual time! The round will be rated for participants with rating lower than 2100. You will have 2 hours to solve 6 problems. The problems were authored and prepared by me.

I would like to thank the following people who made the round possible:

darkkcyan for coordination and help in problem preparation.
KAN for translating the statements.
antontrygubO_o, errorgorn, mjhun, wxhtzdy, generic_placeholder_name, Supermagzzz, vinfat, fishy15, phattd, MarcosK, TeaTime, Stepavly, SebaMarin, CarusoX, snowysecret, ak2006, DeMen100ns and helcsnewsxd for testing and providing valuable feedback.
MikeMirzayanov for great Codeforces and Polygon platforms.

See you in the standings!

UPD:

Scoring distribution: $$$750$$$ — $$$1000$$$ — $$$1250$$$ — $$$2000$$$ — $$$2500$$$ — $$$3000$$$

Thanks to ak2006, video editorials for some of the problems will be available on his channel after the round.

UPD: Editorial

UPD: Congratulations to the winners!

Official winners:

Unofficial winners:

Rev.	By	When	Δ	Comment
en13	MateoCV	2022-03-05 02:40:58	0	(published)
en12	MateoCV	2022-03-05 02:40:44	14
en11	MateoCV	2022-03-05 02:39:46	610	Tiny change: '022-3-3]\n\n2. [user' -> '022-3-3]\n2. [user' (saved to drafts)
en10	MateoCV	2022-03-04 21:44:40	0	(published)
en9	MateoCV	2022-03-04 21:44:06	0	(saved to drafts)
en8	MateoCV	2022-03-04 21:43:02	0	(published)
en7	MateoCV	2022-03-04 21:42:22	62	Tiny change: '\nUPD:\n\n[Editorial' -> '\nUPD: [Editorial' (saved to drafts)
en6	MateoCV	2022-03-04 02:36:07	0	(published)
en5	MateoCV	2022-03-04 02:35:10	244	Tiny change: 'tribution:' -> 'tribution: $750$ ~--- ' (saved to drafts)
en4	MateoCV	2022-03-01 00:33:12	0	(published)
en3	MateoCV	2022-03-01 00:29:55	30	Tiny change: ':1646]. The rou' -> ':1646]. Notice the unusual time! The rou' (saved to drafts)
en2	MateoCV	2022-02-28 21:47:41	0	(published)
en1	MateoCV	2022-02-26 19:32:42	1262	Initial revision (saved to drafts)

History