Hello Codeforces!

I'm very super duper ultra excited to invite you to the first round I have written on my own, Weekend Practice round #6 , taking place on May 11, at 12:30 UTC. This is a rated contest at Eolymp.

At the same time, The Team Selection Test for the Palestinian Team for IOI 2025 will be taking place in a private mirror, and is open for potential participants .

Format and Difficulty

Same as in previous rounds, the competition is primarily aimed at improving practical skills. There will be 2 hours for 5 tasks of varying difficulty, the easiest of which can even be solved by beginners.

The scoring for each task being block-based (meaning points are awarded for each block of tests separately, and only if the solution passes all tests in the block). If there is a tie between two participants, the one whose last productive submission (i.e., a submission that added at least one point) was made earlier will be ranked higher in the leaderboard.

The statements will be available in the following languages: English, Ukrainian, French, Spanish, Azerbaijani, Russian.

Registration

You can join the competition on the competition page.

Prizes

The top-10 participants of the competition, as well as 10 random participants from those who rank from 11th to 100th place, will receive prizes in the form of t-shirts. Please, note, that we have changed how prizes are awarded,

Visit Frequently Asked Questions section to learn more.

Thanks a lot to:

• Denisov For The Supportive , Epic and ORZ Coordination ❤️‍🔥.
• Sergey Kolodyazhnyy for creating Eolymp 😎.
• MathModel (Yes I'm thanking myself 😁) for authoring problems 🤓.
• ALnQ417 for Technical Assistant and Statement Polishing ❤️❤️.
• waipoli , TimDee , Proof_by_QED , tristansun , Timosh , Ignut , barbie ,VladiG , HusseinFarhat , cowthecow , chromate00 , Kamikazee112 , Haidora , ALnQ417 , Think_Only_Once , Abito , conqueror_of_timosh , 5_11N , Aritro_ for testing the contest 🧪.

Score Distribution:

Sponsors

This round is sponsored by Acai Travel

Acai Travel

Acai Travel is a seed-stage startup using AI to transform customer support in the travel industry. With $4M in funding and partnerships with leading global brands, our AI assistant integrates with travel and airline systems to deliver real-time information, automate ticket routing, analyze sentiment, and generate smart auto-replies—boosting efficiency and enhancing customer experiences.

We work with cutting-edge AI to solve real problems, not to chase trends. Our team, based in New York, Barcelona, and Pune, builds practical solutions rooted in strong values, curiosity, and a culture that fosters innovation and positive change.

UPD1 : To Avoid The Clash with Codeforces round $$$1024$$$ , We decided to make the round earlier by $$$2.5$$$ hours , The new Time is : May 11, at 12:30 UTC

UPD2 : Editorials

Problem A

Problem B

Problem C

Problem D

Problem E

UPD3 : First Solvers

Problem A: 00:1:00 Nelt

Problem B: 00:5:00 Nelt

Problem C: 00:20:00 bayleef

Problem D: 01:38:00 JerryJohn

Problem E: No Solve .

UPD4 : Congratulations to Winners !

1. JerryJohn : ($$$680$$$ points ; $$$60\%$$$) $$$-\color{orange}{\text{Gold Medal}}$$$

2. user157517 : ($$$650$$$ points ; $$$56\%$$$) $$$-\color{silver}{\text{Silver Medal}}$$$

3. turneja : ($$$650$$$ points ; $$$56\%$$$) $$$-\color{silver}{\text{Silver Medal}}$$$

4. Horka : ($$$600$$$ points ; $$$52\%$$$) $$$-\color{silver}{\text{Silver Medal}}$$$

5. wery0 : ($$$600$$$ points ; $$$52\%$$$) $$$-\color{brown}{\text{Bronze Medal}}$$$

6. DylanSmith : ($$$570$$$ points ; $$$50 \%$$$) $$$-\color{brown}{\text{Bronze Medal}}$$$

7. ajinkya1p3 : ($$$480$$$ points ; $$$41\%$$$) $$$-\color{brown}{\text{Bronze Medal}}$$$

8. bayleef ($$$480$$$ points ; $$$41\%$$$) $$$-\color{brown}{\text{Bronze Medal}}$$$

9. dimastrakhal ($$$450$$$ points ; $$$40\%$$$) $$$-\color{brown}{\text{Bronze Medal}}$$$

10. TheSensei ($$$405$$$ points; $$$35\%$$$) $$$-\color{brown}{\text{Bronze Medal}}$$$

Final Notes

I Hope You enjoyed The problems and I personally want to hear feedback about the contest , It's my first complete round to compose and I'd like to hear feedback and improvements advices.