### **Hello Codeforces!** ↵
------------------ ↵
↵
I'm excited to invite you to [Weekend Practice round #15](https://eolymp.com/en/contests/8oa8tul6ip5678mhp3g6pcq4qs) , taking place on [**21st December , at 15:00 UTC**](https://www.timeanddate.com/worldclock/fixedtime.html?iso=20251221T1500&ah=2&am=30&msg=Weekend%20Practice%20%2315). 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, Azerbaijani**.↵
↵
## Registration↵
You can join the competition on the [competition page](https://eolymp.com/en/contests/8oa8tul6ip5678mhp3g6pcq4qs).↵
↵
## Prizes↵
The winners of the contest will receive [Eolymp Mints](https://eolymp.com/en/store/about).↵
<center>↵
<table>↵
<thead>↵
<tr>↵
<th>Criteria</th>↵
<th>Eolymp Mints</th>↵
</tr>↵
</thead>↵
<tbody>↵
<tr>↵
<td>Top-$10$ (ranks $1$ to $10$)</td>↵
<td>$500$</td>↵
</tr>↵
<tr>↵
<td>$10$ random participants among Top-$50$ who scored at least $151$ points</td>↵
<td>$250$</td>↵
</tr>↵
<tr>↵
<td>$20$ random participants among Top-$100$ who scored at least $51$ points</td>↵
<td>$100$</td>↵
</tr>↵
</tbody>↵
</table>↵
</center>↵
↵
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:De3b0o,2025-11-03] for authoring problems 🔥 .↵
- **Sergey Kolodyazhnyy** for creating Eolymp 😎.↵
- [user:Connectus,2025-09-14] for Ukrainian Translations.↵
- [user:Triseedot,2025-12-17] , [user:VladProg,2025-12-17] , [user:Timosh,2025-12-16] , [user:Haidora,2025-11-08] , [user:ioma,2025-12-15] , [user:taklaoi,2025-12-15] , [user:arpit_kr,2025-12-15] , [user:Mohammed_Nasserr,2025-12-15] for testing the contest.↵
↵
## Scoring ↵
↵
<center>↵
$$\Large {50-150-200-350-500}$$↵
</center>↵
↵
### Winners↵
↵
##### Congratulations to Winners ! :↵
↵
1. [user:kimononawa,2025-12-21]↵
↵
2. [user:liympanda,2025-12-21]↵
↵
3. [user:mwen,2025-12-21]↵
↵
4. [user:ErikJ,2025-12-21]↵
↵
5. [user:fdg,2025-12-21]↵
↵
### Editorials :↵
↵
[Problem A](https://eolymp.com/en/problems/12300#editorial)↵
↵
[Problem B](https://eolymp.com/en/problems/12301#editorial)↵
↵
[Problem C](https://eolymp.com/en/problems/12302#editorial)↵
↵
[Problem D](https://eolymp.com/en/problems/12303#editorial)↵
↵
[Problem E](https://eolymp.com/en/problems/12304#editorial)
------------------ ↵
↵
I'm excited to invite you to [Weekend Practice round #15](https://eolymp.com/en/contests/8oa8tul6ip5678mhp3g6pcq4qs) , taking place on [**21st December , at 15:00 UTC**](https://www.timeanddate.com/worldclock/fixedtime.html?iso=20251221T1500&ah=2&am=30&msg=Weekend%20Practice%20%2315). 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, Azerbaijani**.↵
↵
## Registration↵
You can join the competition on the [competition page](https://eolymp.com/en/contests/8oa8tul6ip5678mhp3g6pcq4qs).↵
↵
## Prizes↵
The winners of the contest will receive [Eolymp Mints](https://eolymp.com/en/store/about).↵
<center>↵
<table>↵
<thead>↵
<tr>↵
<th>Criteria</th>↵
<th>Eolymp Mints</th>↵
</tr>↵
</thead>↵
<tbody>↵
<tr>↵
<td>Top-$10$ (ranks $1$ to $10$)</td>↵
<td>$500$</td>↵
</tr>↵
<tr>↵
<td>$10$ random participants among Top-$50$ who scored at least $151$ points</td>↵
<td>$250$</td>↵
</tr>↵
<tr>↵
<td>$20$ random participants among Top-$100$ who scored at least $51$ points</td>↵
<td>$100$</td>↵
</tr>↵
</tbody>↵
</table>↵
</center>↵
↵
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:De3b0o,2025-11-03] for authoring problems 🔥 .↵
- **Sergey Kolodyazhnyy** for creating Eolymp 😎.↵
- [user:Connectus,2025-09-14] for Ukrainian Translations.↵
- [user:Triseedot,2025-12-17] , [user:VladProg,2025-12-17] , [user:Timosh,2025-12-16] , [user:Haidora,2025-11-08] , [user:ioma,2025-12-15] , [user:taklaoi,2025-12-15] , [user:arpit_kr,2025-12-15] , [user:Mohammed_Nasserr,2025-12-15] for testing the contest.↵
↵
## Scoring ↵
↵
<center>↵
$$\Large {50-150-200-350-500}$$↵
</center>↵
↵
### Winners↵
↵
##### Congratulations to Winners ! :↵
↵
1. [user:kimononawa,2025-12-21]↵
↵
2. [user:liympanda,2025-12-21]↵
↵
3. [user:mwen,2025-12-21]↵
↵
4. [user:ErikJ,2025-12-21]↵
↵
5. [user:fdg,2025-12-21]↵
↵
### Editorials :↵
↵
[Problem A](https://eolymp.com/en/problems/12300#editorial)↵
↵
[Problem B](https://eolymp.com/en/problems/12301#editorial)↵
↵
[Problem C](https://eolymp.com/en/problems/12302#editorial)↵
↵
[Problem D](https://eolymp.com/en/problems/12303#editorial)↵
↵
[Problem E](https://eolymp.com/en/problems/12304#editorial)
