Resources for coding competition?

So recently a group of friends and I entered an in-person programming competition. The competition is done in Python, and we will have 4 hours to complete roughly 10 algorithm problems of varying degrees of difficulty.

The catch is that we are allowed to bring any resources we want to the competition floor, so long as they are not computing devices (including calculators). So essentially anything I can write on paper and can bring with me for reference. The official Python documentation will already be provided to us, but I was wondering if there are any other good things to bring along with me. I already had the idea of bringing the answer keys of past competitions, and bringing a couple quick Python cheat sheets.

Does anyone know any good reference materials for basic algorithms or data structures, or any other sort of material that would be good to bring along?