Hello, Codeforces!

thenymphsofdelphi, lanhf, and I are delighted to invite you to take part in Codeforces Round 873 (Div. 1) and Codeforces Round 873 (Div. 2) which are going to take place at 14.05.2023 17:35 (Московское время). Participants with a rating lower than 1900 will participate in Division $$$2$$$, while participants with a rating of at least 1900 will participate in Division $$$1$$$.

In both divisions, you will be given 2 hours to solve 6 problems (one of which is divided into two subtasks), all of which were authored and prepared by me, lanhf, and thenymphsofdelphi. We would like to thank the following people who made our round possible:

• 74TrAkToR for his great coordination and help with the problems' preparation during the last 4 months.
• khuepr123 for doing nothing but being the mascot.
• A05, Kawaii, SeehEternity, yanglake, minhnhatnoe, bachbeo2007, TranGiaHuy, SanguineChameleon, HollwoQ_Pelw, socpite, uylulu, hotboy2703, generic_placeholder_name, Theoth_Normie, Kuroni, CDuongg, gamegame, AquaMoon, Huah, MagicalFlower, ugly2333, Lavine, Gary2005, Tuanlinh123, hiennoob, RDDCCD, shiv_codegen, uuzlovetree, E_huan, nixnehc, waaitg, QuangBuiCPP, errorgorn, rsj for testing our round and giving valuable feedback which helped us improve the problemset.
• MikeMirzayanov for the great Codeforces and Polygon platforms.

• Last but not least, you for participating in our round.

Scoring distribution:

Div. 1: 500 — (750+750) — 1500 — 1750 — 2500 — 3500

Div. 2: 500 — 1000 — 1250 — (1250+1250) — 2500 — 2750

We hope all of you will enjoy our problemset. Good luck and may the ratings be with you!

UPD: Congratulations to the winners!!

Also congratulations to ksun48 and Golovanov399 on (re)gaining the Legendary Grandmaster title!

UPD: Editorial