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(def input (->> (slurp "input.txt") | |
clojure.string/split-lines | |
(map #(Integer. %)))) | |
(def part-1 (apply + input)) | |
(def part-2 (->> (cycle input) | |
(reductions + 0) | |
(reduce (fn [seen? v] | |
(if (seen? v) | |
(reduced v) |
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(defn map-vals [f m] | |
(into {} | |
(map (fn [[k v]] [k (f v)])) | |
m)) | |
(defn parse-line [s] | |
(->> (re-find #"^#(\d+) @ (\d+),(\d+): (\d+)x(\d+)" s) | |
rest | |
(map #(Integer/parseInt %)) | |
(map vector [:id :x :y :w :h]) |
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(def input | |
"set of strings representing box IDs" | |
(clojure.string/split-lines (slurp "input.txt"))) | |
(defn twice-and-thrice [id] | |
(let [freqs (-> id frequencies vals set)] | |
[(if (freqs 2) 1 0) | |
(if (freqs 3) 1 0)])) | |
(defn elem-diff [a b] |