Hi again, Codeforces!

fishy15, flamestorm, ScarletS, saarang and I are glad to invite you to our second Constructiveforces round, Codeforces Round 836 (Div. 2), which will be held on Nov/25/2022 18:35 (Moscow time). The round will be rated for participants with rating lower than 2100.

Please note the unusual time!

We'd especially like to thank:

• errorgorn and KAN, for their fantastic coordination and translation of the round!

• MikeMirzayanov, for creating the amazing Codeforces and Polygon platforms!

• Our testers dorijanlendvaj, PurpleCrayon, Ari, atodo, maomao90, prvocislo, nor, AlperenT, phattd, KrowSavcik, idk321, SlavicG, tenth, Nahian9696, Beacon, nyaruhodo, _Vanilla_, MEX1, Awesome3.14, JuanPabloAmezcua, anishde85, coder_sounak, jampm, Codula, ak2006, IAmTheHazard, and bakekaga for testing the round, catching any mistakes and providing lots of valuable feedback! We tried to get a large range of testers with different coding experiences so that everybody enjoys the round.

• And you, the contestant, for taking part in and hopefully enjoying our contest!

You will have 2 hours to work on (and solve!) 6 problems. At most one of the problems will be interactive. Make sure to read this blog and familiarize yourself with these types of problems before the round! You are highly encouraged to read all the problems ;).

The scoring distribution is $$$500-1000-1500-1750-2250-3000$$$.

Good luck, and see you on the scoreboard!

UPD1: Thanks to ak2006 for making video editorials for some of the problems.

UPD2: Editorial is out!

UPD3: Congrats to the winners:

Div. 1 + 2:

1. jiangly
2. SSRS_
3. kotatsugame [tie]
4. Maksim1744 [tie]
5. March_7th

Div. 2:

1. March_7th
2. is_this_Furry
3. puffins
4. DongXuelian
5. ouqI

omg hi Codeforces!

ScarletS, flamestorm, fishy15, saarang, lookcook and I are glad to invite you to our Codeforces round, Codeforces Round 766 (Div. 2), which will be held on Jan/15/2022 17:35 (Moscow time). This round will be rated for participants with rating lower than 2100.

We would like to thank:

• Monogon senpai for excellent coordination of the contest.

• MikeMirzayanov, for creating the amazing Codeforces and Polygon platforms!

• KAN, for Russian translations!

• dorijanlendvaj, errorgorn, PurpleCrayon, generic_placeholder_name, blue, phattd, atharv, tenth, snowysecret, StArChAn, namanbansal013, BRCode, nishuz, Rehan, Urvuk3, somerandomaltacc3034, tdpencil and bakekaga for testing the round, catching any mistakes and providing lots of valuable feedback! We tried to get a large range of testers with different coding experiences so that everybody enjoys the round.

You will have 2 hours to work on (and solve!) 6 problems. There will be at most five hundred interactive problems in the round. Make sure to read this blog and familiarize yourself with these types of problems before the round! You are highly encouraged to read all the problems ;).

Good luck, and see you on the scoreboard!

UPD1: Thanks to the testers ak2006 for making video editorials for most of the problems, and namanbansal013 who will be streaming solutions after the round!

UPD2: The score distribution is $$$500-1250-1250-1750-2000-2750$$$.

UPD3: The editorial is available here.

UPD4: Congrats to the winners!

Div. 2:

1. wk___tzc

2. Alan_boyfriend

3. proton1126

4. raingirl

5. yincheng01

Div. 1 + 2:

1. neal

2. qazswedx2

3. hitonanode

4. Bench0310

5. m_99

We hope you enjoyed the round. Look forward to our next one!