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50 lines
1.4 KiB
Clojure
50 lines
1.4 KiB
Clojure
(require '[clojure.string :as str])
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(def input (->> (slurp "./in")
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(str/split-lines)
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(split-with not-empty)
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((juxt
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(fn [lst]
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(reduce
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#(conj %1 (mapv read-string (str/split %2 #",")))
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#{} (first lst)))
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(fn [lst]
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(->> (second lst)
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(drop 1)
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(map #(-> %
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(str/split #"=")
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(update 0 (comp {\x 0 \y 1} last))
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(update 1 read-string)))
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))))))
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(defn fold-point [idx chg pt]
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(cond-> pt (> (get pt idx) chg) (update idx #(- % (* 2 (- % chg))))))
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(defn print-grid [pts]
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(let [xmax (inc (apply max (map first pts)))
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ymax (inc (apply max (map second pts)))]
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(doseq [y (range 0 ymax)]
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(println
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(str/join
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(for [x (range 0 xmax)] (if (contains? pts [x y]) \@ \ ))
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)))))
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; Part 1
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(let [instruction (first (second input))]
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(->> (first input)
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(map (partial fold-point (first instruction) (second instruction)))
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(distinct)
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(count)
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(println)))
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; Part 2
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(print-grid
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(apply
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(partial
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reduce
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#(let [ins (first %2)]
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(set (map (partial fold-point (first %2) (second %2)) %1))))
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input
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))
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