Hello, Codeforces! & Happy Chinese Teachers' Day!

We (OICon Team) are so excited to invite you to take part in OICon Round 1 (Codeforces Round 896 (Div. 1) and Codeforces Round 896 (Div. 2)) which will start on Sep/10/2023 17:05 (Moscow time). You will be given 6 problems and 2.5 hours to solve them in both divisions.

• Please notice the unusual starting time!
• One of the problems has two versions but their statement are not exactly the same, which means that you can't pass the easy version using the code of the hard version. However, you can only make hacks when you pass both versions.
• There will be $$$0$$$ interactive problem in each division so you needn't read the guide for interactive problems.
• Score distribution:
  • Div. 1: $$$500-(500+750)-1000-1750-2500-3000$$$
  • Div. 2: $$$500-750-1250-(1250+1500)-2500-3250$$$

The problems were authored and prepared by Error_Yuan, duck_pear, programpiggy and me.

We would like to thank:

• Artyom123 for his long-term & high-quality coordination 😊😊😊
• Again, Artyom123 for the Russian translation 👍👍👍
• dqstz, BreakPlus, DisconnectedGraph for providing a few rejected problems 😭😭😭
• Um_nik, gyh20, MagicalFlower, Sugar_fan for Legendary GrandMaster testing 👽👽👽
• sansen, Kubic, Alex_Wei for International GrandMaster testing 😎😎😎
• rui_er, MatrixGroup, swiftc, themoon, N_z__, __builtin_gjr for GrandMaster testing 🧐🧐🧐
• HappyIvan, Azuma_Seren, User_Carrot, Wilson_Inversion, chen_03, Valters07, Lavine, Kieray for Master testing 😯😯😯
• guoziyang, NoCommander, Alan_dong, small_peter for Candidate Master testing 🤔🤔🤔
• Coffee_zzz, fAKezjf, purplevine, Black_Fate for Expert testing 😃😃😃
• mikcf, J.S.Eason for Specialist testing 🙂🙂🙂
• wz20201136 for the only Newbie testing 👀👀👀
• ChatGPT for getting 0 point in both divisions 🤡👈🤣
• And, You, for participating and getting positive delta 😘😘😘
• Last but not least, MikeMirzayanov for great Polygon and Codeforces platforms 🎅🎅🎅

Good Luck & Have Fun!

UPD1. Editorial is out.

UPD2. Contest is over! Congratulations to the winners!