## MB’s Advent of Code tips

* Complex numbers are a nice way of modeling two-dimensional positions.

* Use lists whenever feasible, because there are many useful list functions in the Racket library that don’t have vector equivalents.

* In particular, [these list functions](https://docs.racket-lang.org/reference/pairs.html?q=racket%2Flist#%28part._.Additional_.List_.Functions_and_.Synonyms%29) are very useful.

* The `graph` library can be useful for graph-based problems.

## My solutions

I try to write solutions that are succinct but not cryptic. 

I don’t optimize for speed.