I'm pleased to invite you to Codeforces Round 901 (Div. 1) and Codeforces Round 901 (Div. 2). It starts on Sep/30/2023 17:35 (Moscow time). It also means, the National Day of China arrives during the round. Wish you a nice vacation! 🎉🎉🎉
For both divisions, you will have 3 hours to solve 7 problems.
I would like to thank:
errorgorn for his wonderful coordination.
GeZhiyuan for providing all the problems and "a few" rejected problems.
CLown1331 for Pupil Testing.
You for participating the round.
MikeMirzayanov for Codeforces and Polygon systems.
Especially, I would like to thank errorgorn for his great contribution to the round, njwrz for providing user solutions for all the problems, Kevin114514 for making the announcement and tutorial more readable.
Finally and most importantly, I would like to thank znstz2018 for helping me with everything patiently all the time. This round can't happen without him.
The main character of the problems will be Jellyfish, a sweet little girl. 🍏🍏🍏
Div.1: $$$500$$$ − $$$1250$$$ − $$$1500$$$ − $$$2250$$$ − $$$3000$$$ − $$$4000$$$ − $$$5000$$$
Div.2: $$$500$$$ − $$$1000$$$ − $$$1000$$$ − $$$1250$$$ − $$$2000$$$ − $$$2250$$$ − $$$3000$$$
Good Luck & Have Fun! 🔥🔥🔥
UPD1: Editorial is out.
UPD2: Congratulations to the winners!