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
Now we have a SaaS service running at 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.
Open pre-configured test environment in Gitpod
We are now looking for help with Korean and Japanese translation, if you are a native speaker of these languages, please contact us, pull requests are always welcome.
Email: [email protected]
Hydro QQ User Group: 1085853538
Telegram Group @hydrodev
Telegram @undefinedmoe
The software is distributed under AGPLv3 with additional terms.
Additional terms under AGPLv3 Section 7:
- You must not remove the copyright declaration displayed in the software. (Under AGPLv3, 7(b))
- When you distribute a modified version of the software, you must change the software name or the version number in a reasonable way in order to distinguish it from the original version. (Under AGPLv3, 7(c))
- Unless permitted, you are not allowed to use author's name, trademark or logo to promote the software. (Under AGPLv3, 7(d))
See CONTRIBUTING.md
In dictionary order: