Edit me

This is the player's guide for the Codewarz persistent site. Here you'll find most of what you need to know to get started competing on the site, as well as working toward mastery of your language of choice.

To your left you'll find links to the sections in this guide. If you have trouble finding anything, let us know through the feedback link at the top.

Supported Operating Systems

It really doesn't matter what OS you use to write your code. It is important to keep in mind though what type of machine your code will be graded on.

Although we try our best to filter carriage returns from your code using dos2unix, you may still have issues with your program's logic. Just keep in mind that a new line on Windows requires a carriage return \r character to move the cursor to the first column as well as a newline \n character to start a new line. Linux simply uses \n for new lines without the need for carriage returns.

Submission Operating System Environments

For most submissions, we run your code in an isolated Linux container with no network connectivity whatsoever (except for the loopback address). The one exception is that we run C# submissions on a native Windows container with, likewise, no network connectivity except for the loopback address.


Temporarily disabled along with C# pending player interest.

We use Windows to validate C# submissions.

Learn More


Most submissions will be validated in a Linux container.

Learn More