Advent of Code 2023 - Day 19

vkatsuba · December 19, 2023, 9:29am

Hey, coding virtuosos! Ukrainian Erlanger here , extending a warm Tuesday greeting. It’s Day 19 in our thrilling journey through Advent of Code, and a new puzzle awaits your coding ingenuity. Embrace the challenge, tackle the intricacies, and don’t forget to showcase your brilliant solutions in the comments below. Let’s turn this Tuesday into a day of coding triumph and keep the collaborative spirit alive! Happy coding, folks!

wfv · December 20, 2023, 3:21am

github.com

wfvining/aoc2023/blob/main/day19/day19.erl

-module(day19).

-compile(export_all).

load_input(Path) ->
    {ok, Data} = file:read_file(Path),
    [Workflows, Parts] = binary:split(Data, <<"\n\n">>),
    {parse_workflows(Workflows), parse_parts(Parts)}.

parse_parts(PartsStr) ->
    Parts = binary:split(PartsStr, <<"\n">>, [global, trim]),
    [parse_part(binary_to_list(Part)) || Part <- Parts].

parse_part(Part) ->
    RE = "\\{x=(\\d+),m=(\\d+),a=(\\d+),s=(\\d+)\\}",
    {match, [X, M, A, S]} =
        re:run(Part, RE, [{capture, [1, 2, 3, 4], list}]),
    #{x => list_to_integer(X),
      m => list_to_integer(M),
      a => list_to_integer(A),

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