For the code submission, here's what I'm looking for:
1. The code itself
2. Instructions/README for compiling (if necessary) and running the code
3. Datasets (or pointers to datasets) that can be used to verify the code runs correctly.
I'll also look through the code to make sure you've used comments, etc., just the basic software engineering stuff.
To submit the code, either upload it in a compressed archive (please use either .zip or tar.gz and not .rar) or provide a link to an URL where the code is available.