> For the complete documentation index, see [llms.txt](https://docs.codebattles.ru/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.codebattles.ru/en_v3/readme.md).

# About the V3 System

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This documentation is for version v3, which is actively developed and supported
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## Who This System Is For

Initially, the system was developed for schools and teachers who want to conduct lessons in a more interesting and interactive format. However, you can also organize your own competitions, for example, among your friends.

## Navigation

For your convenience, all documentation is divided into sections. You can access them from the menu on the left.

## For Developers

If you are a developer and want to write your own tools, the API description can be found in the API section.

[Backend API](/en_v3/api/backend.md) - main API

[Checker API](/en_v3/api/checker-api.md) - API for checkers that verify solutions

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If you found an answer to your question here, you can write to [Telegram](https://doctorixx.t.me/)
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