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+! Copyright (C) 2024 Julien (adyxax) Dessaux.
+! See https://git.adyxax.org/adyxax/advent-of-code/tree/LICENSE for EUPL license.
+USING: assocs io io.encodings.utf8 io.files kernel math math.parser
+math.statistics namespaces prettyprint sequences sorting splitting ;
+IN: aoc.2024.01
+
+<PRIVATE
+
+: load_input ( filename -- array array )
+    "~/git/adyxax/aoc/2024/01-Historian_Hysteria/"
+    swap append utf8 file-lines
+    [ split-words harvest ] map unzip
+    [ [ string>number ] map ] bi@ ;
+
+: part1 ( filename -- n )
+    load_input
+    [ sort ] bi@
+    [ - abs ] 2map
+    sum ;
+
+: part2 ( filename -- n )
+    load_input
+    histogram ! turns an array into a hashtable of { value occurrences }
+    '[ dup _ at 0 or * ] map
+    sum ;
+
+PRIVATE>
+
+: aoc202401 ( -- )
+    "input" part1 pprint nl
+    "input" part2 pprint nl ;
+
+MAIN: aoc202401