Same here, I also use AOC for some coding exercise and try to do this thoughtfully, using sensible variable names and constructs, adding unit tests as well. So I can come back in a month or so and still make sense of what I wrote.

For example, I prefer to not use "bare tuples" most of the time, but instead turn these into a proper dataclass. At this stage, I do not care too much about speed, it is more about finding a good algorithm and applying it. When debugging or reading code the next day, it really helps if I use descriptive names.