author: Hori

Code: 288397475

author: willy108

Code: 288397529

author: Hori

Code: 288397556

author: ChatGPT and oursaco

Code: 288397595

author: lunchbox

Code: 288397611

author: turtletortles

Code: 288397640

author: sum

Code: 288397661

author: Benq

Code: 288397685

author: Hori

Code: 288397713

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 Oct/27/2024 17:35 (Moscow time) we will host Codeforces Global Round 27.

Codeforces Global Round 27 marks the third 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 8 problems were authored by our 8 authors: Benq, lunchbox, oursaco, sum, willy108, Hori, turtletortles, and last but not least ChatGPT.

We would also like to thank:

• Our coordinatorz Sugar_fan (first time) and errorgorn (almost last time)
• Our testers jqdai0815, SSerxhs, RDDCCD, wygzgyw, fallleaves01, triple__a, tarjen, omeganot, Yam, InternetPerson10, EmeraldBlock, Cai_Guang, Tobo, jay_jayjay, Nanani, ezraft, myst-6, Mr.Pie, AbduSaber, A_Nafees, Timosh, redpanda, newb_programmer, Jasonwei08, koolkid403, ShineChang318, khluo
• Alexdat2000 for translating the statements to Russian
• the one and only KAN
• MikeMirzayanov for creating the Codeforces platform

Round Information:

• Duration: 180 minutes
• Number of problems: 8 problems with 1 subtask
• Score distribution: 250 — 500 — 1000 — 1500 — 2000 — 2250 — (2250 — 2000) — 4500

We look forward to your participation!

UPD: Congrats to the winners

1. Kevin114514
2. 275307894a
3. jiangly
4. JoesSR
5. ksun48
6. turmax
7. dXqwq
8. hos.lyric
9. Rewinding
10. jiangbowen

UPD2: First solves

A: dXqwq
B: hos.lyric
C: dorijanlendvaj
D: riantkb
E: turmax
F: taeyeon_ss
G1: taeyeon_ss
G2: Kevin114514
H: orz (only in contest solve!)

UPD3: Editorial