commit 232c3c589b0a8c13906872aa19760bef40fb0a56 Author: didier amyot Date: Sun Dec 1 20:51:56 2024 -0500 first question diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..4fda814 --- /dev/null +++ b/.gitignore @@ -0,0 +1,5 @@ +.cpcache +.nrepl-port +add .idea +advent-of-code-2024.iml +.idea diff --git a/deps.edn b/deps.edn new file mode 100644 index 0000000..024a763 --- /dev/null +++ b/deps.edn @@ -0,0 +1 @@ +{:deps {}} \ No newline at end of file diff --git a/src/question_1.clj b/src/question_1.clj new file mode 100644 index 0000000..5947569 --- /dev/null +++ b/src/question_1.clj @@ -0,0 +1,33 @@ +(ns question-1 + (:require [clojure.string :as strings] + [question-1-input])) + +(def test-input "3 4\n4 3\n2 5\n1 3\n3 9\n3 3") + +(defn extract-columns [input] + (let [lines (strings/split-lines input) + not-empty-lines (filter #(not (strings/blank? %)) lines) + as-longs (map #(map parse-long (strings/split % #"\s+")) not-empty-lines)] + [(mapv first as-longs) (mapv second as-longs)])) + + +(defn question-1-a [input] + (let [[col-1 col-2] (extract-columns input) + col-1 (sort col-1) + col-2 (sort col-2) + diff (comp abs -) + diffs (map diff col-2 col-1)] + (apply + diffs))) + + +(defn question-1-b [input] + (let [[col-1 col-2] (extract-columns input) + col-2-freqs (frequencies col-2) + similarities (map #(* % (get col-2-freqs % 0)) col-1)] + (apply + similarities))) + + +(defn -main [] + (let [input question-1-input/input-question-1] + (println "Solution to question 1-a is: " (question-1-a input)) + (println "Solution to question 1-b is: " (question-1-b input)))) \ No newline at end of file diff --git a/src/question_1_input.clj b/src/question_1_input.clj new file mode 100644 index 0000000..9b49e72 --- /dev/null +++ b/src/question_1_input.clj @@ -0,0 +1,3 @@ +(ns question-1-input) + +(def input-question-1 "49744 57964\n20738 85861\n20319 65072\n79568 74248\n78194 83454\n48701 94102\n69552 26808\n62781 67392\n85323 47428\n99344 72568\n27523 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