Hello, Codeforces!
We are pleased to announce the resumption of the Global Rounds. Thanks to XTX Markets for supporting the initiative! In 2024, we will hold 4 such rounds. The series results will take into account the best 3 participations out of 4.
On Dec/19/2024 17:35 (Moscow time) we will host Codeforces Global Round 28. 
Codeforces Global Round 28 marks the fourth round in the 2024 series of Codeforces Global Rounds. These rounds are open and rated for everyone.
The prizes for this round are as follows:
- The top 30 participants will receive a t-shirt.
- 20 t-shirts will be randomly distributed among participants ranked between 31 and 500, inclusive.
The prizes for the 4-round series in 2024:
- In each round, the top-100 participants get points according to the table.
- A participant's final score will be the sum of the points they earned in their 3 highest-placing rounds.
- The top 20 participants across the series will receive sweatshirts and placement certificates.
We extend our gratitude to XTX Markets for supporting the global rounds initiative in 2024!
The 9 problems were authored by our 4 authors: JoesSR, cmk666, wsyear and Little09.
We would also like to thank:
- Our coordinator 244mhq.
- Our friends who discussed the task with us zjy2008, Zhouershan, LXH-cat, 5ab, cyb1010.
- Our testers orzdevinwang, Um_nik, 275307894a, A_G, JCY_, A_zjzj, umbrella-leaf, wyrqwq, zltzlt, Daniel777, Error_Yuan, lgswdn, gyydp123_LIM, Daniel081024, omeganot, jimmyywang, Meatherm, operator_, Imdie, chengcheng5677, Xiaohuba, ikira.57, Hanghang007, Chenly, angryarabianman, 0x4f, Hori, OME_, huangyuheng, newb_programmer, CuteWhite, Abracadaber, Union_of_Britain, ishaandas1, dazlersan1, OIer_Chtholly.
- 244mhq for translating the statements to Russian.
- MikeMirzayanov for creating the Codeforces platform.
Round Information:
- Duration: 180 minutes.
- Number of problems: 9 problems with 1 subtask.
- Score distribution: $$$ 250 - 500 - 1000 - 1250 - 1750 - 2000 - 2250 - 2750 - (3000 + 3000) $$$.
We eagerly anticipate your participation!
As a tester, I enjoyed the problems a lot!
As a tester, I enjoyed watching you suffer.
Should I be worried?
yes definitely :)
as a participant, I have no voice to cry suffering.
Super excited for Global Round 28! Big thanks to the authors, testers, and XTX Markets for bringing us these amazing rounds. Let’s have fun solving the problems—good luck to everyone competing
expecting increase
As an author, I hope you have fun & enjoy the problems!
As a tester, I tested.
(3000+3000). it seems a quite hard problem
Little unlucky it is during Saint Nicholas
As a discussant, I am glad with friends' problems.
December 19 is my birthday.
But will do a contest that day.
As one of the authors, I hope you enjoy our problems!
As a tester, I won't get negative delta :)
As a tester, I wish everyone good luck! :)
As a tester, I want to gain Contribution.