### **Hello Codeforces!** ↵
------------------ ↵
↵
I'm excited to invite you to [Weekend Practice round #12](https://eolymp.com/en/contests/d1vblrqu112ord1d68l1dh4670) , taking place on [**26th October, at 14:00 UTC**](https://www.timeanddate.com/worldclock/fixedtime.html?iso=20251026T1600&ah=2&am=0&msg=Weekend%20Practice%20%2312). This is a **rated** contest at Eolymp.↵
↵
## 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](https://eolymp.com/en/contests/d1vblrqu112ord1d68l1dh4670).↵
↵
## 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](https://eolymp.com/en/learning/weekend-practice#frequently-asked-questions) section to learn more.↵
↵
## Credits↵
- [user:MathModel,2025-10-16] For Coordinating The Round 😎.↵
- [user:MathModel,2025-10-16] , [user:turneja,2025-10-16] and [user:tamzid1,2025-10-16] for authoring problems 🔥 .↵
- **Sergey Kolodyazhnyy** for creating Eolymp 😎.↵
- [user:Denisov,2025-09-14] for Ukrainian and Russian Translations.↵
- [user:Denisov,2025-09-08] , [user:SmolBrain,2025-10-20] , [user:Jahonalix,2025-10-17] , [user:de_sousa,2025-10-16] , [user:timosh,2025-10-16] , [user:turneja,2025-10-16] , [user:De3b0o,2025-10-16] , [user:Too_Weak_to_anything,2025-10-16] , [user:Seriously_Its_Sameer,2025-09-08] , [user:hxu10,2025-10-16] for testing the contest 🧪. ↵
↵
<center>↵
<h3 style="color:red;">Please Note The Unusual Score Distribution</h3>↵
↵
<h1> </h1> ↵
$$\Large \color{red}{50-200-300-350-500}$$↵
</center>↵
↵
## Sponsors↵
↵
This round is sponsored by [Acai Travel](https://acaitravel.com).↵
↵
<center>↵
<img src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQHqMYoiCWxkthmPfxh-3j03cgqPVQlTSTxcg&s">↵
</center>↵
↵
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.↵
↵
[Visit acaitravel.com](https://acaitravel.com/) ↵
------------------ ↵
↵
I'm excited to invite you to [Weekend Practice round #12](https://eolymp.com/en/contests/d1vblrqu112ord1d68l1dh4670) , taking place on [**26th October, at 14:00 UTC**](https://www.timeanddate.com/worldclock/fixedtime.html?iso=20251026T1600&ah=2&am=0&msg=Weekend%20Practice%20%2312). This is a **rated** contest at Eolymp.↵
↵
## 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](https://eolymp.com/en/contests/d1vblrqu112ord1d68l1dh4670).↵
↵
## 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](https://eolymp.com/en/learning/weekend-practice#frequently-asked-questions) section to learn more.↵
↵
## Credits↵
- [user:MathModel,2025-10-16] For Coordinating The Round 😎.↵
- [user:MathModel,2025-10-16] , [user:turneja,2025-10-16] and [user:tamzid1,2025-10-16] for authoring problems 🔥 .↵
- **Sergey Kolodyazhnyy** for creating Eolymp 😎.↵
- [user:Denisov,2025-09-14] for Ukrainian and Russian Translations.↵
- [user:Denisov,2025-09-08] , [user:SmolBrain,2025-10-20] , [user:Jahonalix,2025-10-17] , [user:de_sousa,2025-10-16] , [user:timosh,2025-10-16] , [user:turneja,2025-10-16] , [user:De3b0o,2025-10-16] , [user:Too_Weak_to_anything,2025-10-16] , [user:Seriously_Its_Sameer,2025-09-08] , [user:hxu10,2025-10-16] for testing the contest 🧪. ↵
↵
<center>↵
<h3 style="color:red;">Please Note The Unusual Score Distribution</h3>↵
↵
<h1> </h1> ↵
$$\Large \color{red}{50-200-300-350-500}$$↵
</center>↵
↵
## Sponsors↵
↵
This round is sponsored by [Acai Travel](https://acaitravel.com).↵
↵
<center>↵
<img src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQHqMYoiCWxkthmPfxh-3j03cgqPVQlTSTxcg&s">↵
</center>↵
↵
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.↵
↵
[Visit acaitravel.com](https://acaitravel.com/) ↵
