Codeforces Round #822 (Div. 2)

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

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!

UPD: Score Distribution: 500 — 750 — 1250 — 2000 — 2250 — 3250

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)