Advent of Code is a yearly coding challenge to save Christmas!
You can read more about it here: https://adventofcode.com/
Run mix deps.get to fetch dependencies.
Run mix compile to compile the application.
Run mix test to run tests.
Run iex -S mix to run an iex session.
Run Solver.solve(day, part), where day is the day of the puzzle (1 - 25) and part is the part of the puzzle (1 or 2).