# Hydro

![GitHub Workflow Status](https://img.shields.io/github/workflow/status/hydro-dev/hydro/CI)
![hydrooj](https://img.shields.io/npm/dm/hydrooj)
![npm](https://img.shields.io/npm/v/hydrooj?label=hydrooj)
![node-current](https://img.shields.io/node/v/hydrooj)
![GitHub contributors](https://img.shields.io/github/contributors/hydro-dev/Hydro)
![GitHub commit activity](https://img.shields.io/github/commit-activity/y/hydro-dev/Hydro)

Hydro is a high-performance online judge system.  
It is easy to deploy (with install script), light weight and extensible.  
Also see previous version at [vijos/vj4](https://github.com/vijos/vj4)

Now we have a SaaS service running at [https://hydro.ac](https://hydro.ac). (Fully free of charge!)  
You can easily have a glance at the features of the system and try it out.  
You can also just use the service without self-hosting the system with the powerful `domain` feature.  
Feel free to create an account and then navigate to `MyAccount > MyDomains > Create Domain` to create one.  

[中文](https://hydro.js.org/)  

[Open pre-configured test environment in Gitpod](https://gitpod.io/#https://github.com/hydro-dev/Hydro)  

## Contact US

QQ [3402182471](https://wpa.qq.com/msgrd?v=3&uin=3402182471&site=qq&menu=yes)  
Hydro QQ User Group: 1085853538  
Telegram Group [@hydrodev](https://t.me/hydrodev)
Telegram [@webpack_exports_undefined](https://t.me/webpack_exports_undefined)  

## License

AGPL3

## Contributing

See [CONTRIBUTING.md](CONTRIBUTING.md)

## Thanks to

In dictionary order:

- [Github](https://github.com/) Code hosting and workflow.  
- [criyle](https://github.com/criyle) Sandbox.  
- [Vijos](https://github.com/vijos/vj4) UI framework.