Your interface with the judge is the player file player.py. For this problem, look for PlayerControllerRL class within player.py. After editing player.py, rename it as player_2.py for submission.
A sample scenario is provided in the code skeleton (the settings.yml file). You are invited to vary the scenario by modifying the settings.yml to test your RL agent on different scenarios.
The skeleton handles all the output for you. Avoid using stdin and stdout. (Use stderr for debugging.)