Advent of Code 2024
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Alright, show me I’m not the only one in this community, and show off some solutions!

Here’s my Day 1 solution in Factor (minus imports):

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: get-input ( -- left-list right-list )
  "aoc-2024.01" "input.txt" vocab-file-lines
  [ split-words harvest ] map unzip
  [ [ string>number ] map ] bi@ ;

: part1 ( -- n )
  get-input
  [ sort ] bi@
  [ - abs ] 2map-sum ;

: part2 ( -- n )
  get-input
  histogram
  '[ dup _ at 0 or * ] map-sum ;

Sadly, Factor doesn’t get highlighted properly here, so here it is again as an image:

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syntax-highlighted screenshot of the code above

I probably won’t last the week, but what solutions I do have will be up on GitHub.

  • Andy@programming.devOPM
    1·
    20 days ago

    Day 3

    spoiler 
    : get-input ( -- corrupted-input )
  "aoc-2024.03" "input.txt" vocab-file-path utf8 file-contents ;

: get-muls ( corrupted-input -- instructions )
  R/ mul\(\d+,\d+\)/ all-matching-subseqs ;

: process-mul ( instruction -- n )
  R/ \d+/ all-matching-subseqs
  [ string>number ] map-product ;

: solve ( corrupted-input -- n )
  get-muls [ process-mul ] map-sum ;

: part1 ( -- n )
  get-input solve ;

: part2 ( -- n )
  get-input
  R/ don't\(\)(.|\n)*?do\(\)/ split concat
  R/ don't\(\)(.|\n)*/ "" re-replace
  solve ;

    Image:

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    code above as colorful image