Codeforces Round #722

Hi Codeforces!

Dio, Keshi, Tet, alireza_kaviani, Davoth, AliShahali1382 and I are delighted to invite you to participate in Codeforces Round 722 (Div. 1) and Codeforces Round 722 (Div. 2), which will be held at May/24/2021 17:35 (Moscow time). Each division will have 6 problems and 2 hours and 15 minutes to solve them.

The curse has finally been lifted! We are proud to announce that antontrygubO_o didn't reject even a single task from the Div. 1 part!

Huge thanks to the following people:

antontrygubO_o for being an outstanding coordinator; This round wouldn't have happened if it weren't for him.
Our ever-growing army of testers gamegame, Amoo_Safar, Atreus, dorijanlendvaj, aarr, Monogon, EnEm, N.N_2004, AaParsa, _Seyed37_, Roham, Clix, Narut, SinaSahabi, sinamhdv, arvindr9, shokouf, munghatekartik, Ali_Tavakoli, vodacbaoan, Shahraaz, -Suto-, coderz189, kassutta, the_borono, saarang, iANikzad, Etherite and -this-is-obd- for testing the round and providing invaluable feedback.
MikeMirzayanov for the amazing platforms Codeforces and Polygon!
Last but not least, to all the participants of this round!

For the sake of having short statements, this round does not have a theme. The characters featured in the statements are: Soroush (Tet), Sifid (Davoth), Parsa (Dio), Nima (N.N_2004), AaParsa (AaParsa), Haj Davood (davooddkareshki), Kavi (alireza_kaviani), Keshi (Keshi), Mashtali (AliShahali1382) and AmShZ (AmShZ).

Please read all of the problems and their notes, enjoy your time and solve as many as you can! Good luck have fun to everyone!

~~The scoring distributions will be announced later.~~

UPD: Here are the scoring distributions:

UPD: Editorial is out!

Rev.	By	When	Δ	Comment
en12	Tet	2021-05-24 21:43:20	1
en11	AliShahali1382	2021-05-24 21:42:51	72
en10	Tet	2021-05-24 15:43:24	165	Tiny change: 'ced later.<\strike>\n\nHere a' -> 'ced later.\n\nHere a'
en9	Tet	2021-05-24 13:36:57	30	Tiny change: '], [user:A' -> '], [user:Amoo_Safar,2021-05-22], [user:A'
en8	Tet	2021-05-23 06:45:27	23	Tiny change: 'announced shortly.' -> 'announced <strike>shortly<\strike> later.'
en7	Tet	2021-05-22 21:12:04	42	Tiny change: '2], [user:' -> '2], [user:growup974,2021-05-22], [user:'
en6	Tet	2021-05-22 20:32:51	25	Tiny change: '2], [user:' -> '2], [user:Narut,2021-05-22], [user:'
en5	Tet	2021-05-22 18:59:03	26	Tiny change: '2], [user:' -> '2], [user:Atreus,2021-05-22], [user:'
en4	Tet	2021-05-22 18:00:26	91
en3	Tet	2021-05-22 17:40:14	8
en2	Tet	2021-05-22 17:17:31	2	Tiny change: '2], [user:Seyed37,2021-05-2' -> '2], [user:_Seyed37_,2021-05-2'
en1	AmShZ	2021-05-22 17:14:23	2465	Initial revision (published)