Hello Codeforces!
We are happy to announce the new episode of Kotlin Heroes! It is both an opportunity to try learning a new programming language (if you've never coded in Kotlin before) or solve programming problems of very different levels of difficulty in it (if you're already familiar with Kotlin). No matter if you're a professional or a beginner, we'll be glad to see you participate!
This is already the fourteenth time we conduct this competition, and the previous 13 episodes had lots of amazingly talented programmers participating. You can see for yourself by checking them out: Episode 1, Episode 2, Episode 3, Episode 4, Episode 5: ICPC Round, Episode 6, Episode 7, Episode 8, Episode 9, Episode 10, Episode 11, Episode 12 and Episode 13.
To prepare for the Episode 14, we advise you to register to the practice round, which contains several problems of various difficulties from past Codeforces contests. In the practice round, all solutions will be open to view for anyone.
We also recommend that you check some resources which can help you learn more about competitive programming in Kotlin:
- An official competitive programming tutorial.
- A base of solutions for Advent of Code algorithmic puzzles.
- A collection of videos on using Kotlin in Competitive Programming, all arranged into one YouTube playlist.
And if you’d like to see how the top competitive programmers approach these challenges, check out ecnerwala and SecondThread solving problems from this practice round live on stage at the ICPC World Finals in Baku.
On March 2, 2026, the main phase of the contest starts! During Kotlin Heroes: Episode 14, you will have 2 hours and 30 minutes to solve several programming problems, ranging from simple short exercises to challenges that will test both your coding skills and algorithmic thinking.
The use of AI-based tools during the main contest is strictly limited. To find out the guidelines for proper AI use, what is allowed and what is prohibited, please read the post "Rule Restricting the use of AI". Improper use of AI tools during the main contest may result in disqualification. Using automatic translation tools (including but not limited to neural networks and AI) to convert code written in other programming languages to Kotlin goes against the spirit of the competition, so it is also strictly prohibited.
Prizes:
- 🥇 $512 (or equivalent value) for 1st place
- 🥈 $256 for 2nd place
- 🥉 $128 for 3rd place
- 👕 Kotlin Heroes T-shirts for the top 50 participants
- 🎁 A raffle of 50 T-shirts for anyone who solves at least one problem
Please note that we are not able to ship prizes to any country, state, province, or territory subject to comprehensive OFAC sanctions, including Belarus, Cuba, Iran, North Korea, Russia, Syria, or the Crimea, Donetsk, or Luhansk regions. For complete the list, please visit this page.
Good luck to all of the participants! I hope you will enjoy the problems we've prepared.