Codeforces Round #822 (Div. 2)

Hello CodeForces!

Me, AHappyPotato and __jk__ are excited to invite you to participate in Codeforces Round 822 (Div. 2). It will start at Sep/23/2022 15:05 (Moscow time). The round will be rated for everyone with less than 2100 rating. You have 2 hours to solve 6 problems. Please note the unusual start time.

We would like to take this opportunity to thank everyone who have contributed to our round:

darkkcyan for his excellent coordination;
anthony123 and jerryliuhkg for proposing tasks that did not make it to the final problemset;
thenymphsofdelphi, kevinxiehk, xuanquang1999, vinfat, ACGN, Mike4235, brianlee.lck, JeffreyLC, prvocislo, ITO, snowysecret marvinthang, QuangBuiCPP, Rekaxem, Alan, sharkycode and OGname, for testing and providing invaluable advice;
KAN for translating the problem statements into Russian;
MikeMirzayanov for the marvellous CodeForces and Polygon platforms; and finally,
You, for participating in this contest!

We look forward to seeing you on the leaderboard!

We are going to release the score distribution shortly before the round commences.

UPD: The round has been rescheduled due to a clash with a CodeChef contest

Rev.	By	When	Δ	Comment
en15	arvindf232	2022-09-23 18:23:25	407	Tiny change: 'fficial:\n1. [user' -> 'fficial:\n\n1. [user'
en14	arvindf232	2022-09-23 17:55:07	63
en13	arvindf232	2022-09-23 13:27:16	122	Tiny change: 'board!\n\nScore Dist' -> 'board!\n\nUPD: Score Dist'
en12	arvindf232	2022-09-22 14:16:09	184	Tiny change: 'scheduled due to a ' -> 'scheduled to a different time due to a '
en11	arvindf232	2022-09-22 02:24:13	3	Tiny change: 'scheduled to due to a ' -> 'scheduled due to a '
en10	arvindf232	2022-09-22 02:17:33	125	Tiny change: 'ences.\n\nUPD: The roun' -> 'ences.\n\nUPD: The roun'
en9	arvindf232	2022-09-20 16:07:24	33	Tiny change: '22-09-17] ' -> '22-09-17] and [user:anthony123,2022-09-17] '
en8	arvindf232	2022-09-20 13:02:34	106
en7	arvindf232	2022-09-20 02:52:38	8	(published)
en6	arvindf232	2022-09-19 17:10:48	2	Tiny change: 'problemset.\n- [user:' -> 'problemset;\n- [user:'
en5	arvindf232	2022-09-19 17:03:17	23	Tiny change: 'ordination and rejecting problems;\n- [user' -> 'ordination;\n- [user'
en4	arvindf232	2022-09-19 17:01:35	153
en3	arvindf232	2022-09-17 18:45:43	1	Tiny change: '22-09-17],[user:OGna' -> '22-09-17], [user:OGna'
en2	arvindf232	2022-09-17 18:43:18	2	Tiny change: 'ble advice,\n- [user:' -> 'ble advice;\n- [user:'
en1	arvindf232	2022-09-17 18:42:12	1421	Initial revision (saved to drafts)