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stuartstein777/day3.clj

Created December 3, 2020 16:15
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advent-of-code-2020-day3
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day3.clj
(defn is-tree [x i]
(= \# (nth i (mod x (count i)))))
(let [input (->> (slurp "input.txt")
(str/split-lines))
x-step 7
y-step 1]
(->> (take-nth y-step input)
(map is-tree (iterate #(+ x-step %) 0))
(filter true?)
(count)))
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