Hello Codeforces!

I'm excited to invite you to Weekend Practice round #13 , taking place on 9th November, at 14:00 UTC. 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, Russian.

One of the problems will be interactive so please make sure to be familiar with them.

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.

Credits

• MathModel For Coordinating The Round 😎.
• De3b0o for authoring problems 🔥 .
• Sergey Kolodyazhnyy for creating Eolymp 😎.
• Denisov for Ukrainian and Russian Translations.
• Denisov , kimononawa , JuicyGrape , edogawa_something , Pa_sha , Haidora , 0pt1mus23 for testing the contest.

Scoring

Congratulations to Winners $$$!$$$ :

1. physics0523

2. liympanda

3. wery0

4. pcheloveks

5. hieptk

Congratulations to First Solvers $$$!$$$ :

A : hieptk

B : physics0523

C : physics0523

D : liympanda

E : NA

Editorial

Problem A

Problem B

Problem C

Problem D

Problem E