### **Hello Codeforces!** ↵
------------------ ↵
↵
I'm excited to invite you to [Weekend Practice round #10](https://basecamp.eolymp.com/en/contests/n0qoftbe7p7q59gr3p5fft07kk) , taking place on [**14th September, at 14:00 UTC**](https://www.timeanddate.com/worldclock/fixedtime.html?day=14&month=9&year=2025&hour=17&min=00&sec=0&p1=166). 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://basecamp.eolymp.com/en/contests/n0qoftbe7p7q59gr3p5fft07kk).↵
↵
## 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,2025-09-08] For Coordinating The Round 😎.↵
- [user:De3b0o,2025-05-19] for authoring problems 🔥 .↵
- [user:Denisov,2025-09-14] for Ukrainian and Russian Translations.↵
- [user:Denisov,2025-09-08] , [user:FairyWinx,2025-09-08] , [user:Proof_by_QED,2025-09-08] , [user:barbie,2025-09-08] , [user:edogawa_something,2025-09-08] , [user:JahonaliX,2025-09-08] , [user:Seriously_Its_Sameer,2025-09-08] , [user:SashaT9,2025-09-08] , [user:Haidora,2025-09-08] for testing the contest 🧪. ↵
↵
↵
## 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/) ↵
↵
## Congrats to First Solvers↵
↵
A : [user:BehruzbekX,2025-09-14]↵
↵
B : [user:turneja,2025-09-14]↵
↵
C : [user:liympanda,2025-09-14]↵
↵
D : [user:physics0523,2025-09-14]↵
↵
E : [user:wery0,2025-09-14]↵
↵
## Congrats to Winners :↵
↵
1. [user:turneja,2025-09-14] (orz AK!)↵
↵
2. [user:physics0523,2025-09-14] (orz AK!)↵
↵
3. [user:LucaLucaM,2025-09-14] (orz for just keep trying problem E until almost AC !)↵
↵
4. [user:wery0,2025-09-14] (orz first solving E)↵
↵
5. [user:liympanda,2025-09-14]↵
↵
## Editorials :↵
↵
A : [Problem A](https://basecamp.eolymp.com/en/problems/12212#editorial)↵
↵
B : [Problem B](https://basecamp.eolymp.com/en/problems/12213#editorial)↵
↵
C : [Problem C](https://basecamp.eolymp.com/en/problems/12214#editorial)↵
↵
D : [Problem D](https://basecamp.eolymp.com/en/problems/12215#editorial)↵
↵
E : [Problem E](https://basecamp.eolymp.com/en/problems/12216#editorial)
------------------ ↵
↵
I'm excited to invite you to [Weekend Practice round #10](https://basecamp.eolymp.com/en/contests/n0qoftbe7p7q59gr3p5fft07kk) , taking place on [**14th September, at 14:00 UTC**](https://www.timeanddate.com/worldclock/fixedtime.html?day=14&month=9&year=2025&hour=17&min=00&sec=0&p1=166). 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://basecamp.eolymp.com/en/contests/n0qoftbe7p7q59gr3p5fft07kk).↵
↵
## 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,2025-09-08] For Coordinating The Round 😎.↵
- [user:De3b0o,2025-05-19] for authoring problems 🔥 .↵
- [user:Denisov,2025-09-14] for Ukrainian and Russian Translations.↵
- [user:Denisov,2025-09-08] , [user:FairyWinx,2025-09-08] , [user:Proof_by_QED,2025-09-08] , [user:barbie,2025-09-08] , [user:edogawa_something,2025-09-08] , [user:JahonaliX,2025-09-08] , [user:Seriously_Its_Sameer,2025-09-08] , [user:SashaT9,2025-09-08] , [user:Haidora,2025-09-08] for testing the contest 🧪. ↵
↵
↵
## 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/) ↵
↵
## Congrats to First Solvers↵
↵
A : [user:BehruzbekX,2025-09-14]↵
↵
B : [user:turneja,2025-09-14]↵
↵
C : [user:liympanda,2025-09-14]↵
↵
D : [user:physics0523,2025-09-14]↵
↵
E : [user:wery0,2025-09-14]↵
↵
## Congrats to Winners :↵
↵
1. [user:turneja,2025-09-14] (orz AK!)↵
↵
2. [user:physics0523,2025-09-14] (orz AK!)↵
↵
3. [user:LucaLucaM,2025-09-14] (orz for just keep trying problem E until almost AC !)↵
↵
4. [user:wery0,2025-09-14] (orz first solving E)↵
↵
5. [user:liympanda,2025-09-14]↵
↵
## Editorials :↵
↵
A : [Problem A](https://basecamp.eolymp.com/en/problems/12212#editorial)↵
↵
B : [Problem B](https://basecamp.eolymp.com/en/problems/12213#editorial)↵
↵
C : [Problem C](https://basecamp.eolymp.com/en/problems/12214#editorial)↵
↵
D : [Problem D](https://basecamp.eolymp.com/en/problems/12215#editorial)↵
↵
E : [Problem E](https://basecamp.eolymp.com/en/problems/12216#editorial)
