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27 lines
615 B
Clojure
27 lines
615 B
Clojure
(def to-closing {\{ \} \( \) \[ \] \< \>})
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(def to-score {\) 3 \] 57 \} 1197 \> 25137})
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(defn check-line [input]
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(loop [in input open '()]
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(cond
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(empty? in)
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nil
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(and (contains? #{\} \) \] \>} (first in))
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(not= (to-closing (first open)) (first in)))
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(first in)
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:else
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(recur
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(rest in)
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(if (contains? #{\{ \( \[ \<} (first in))
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(conj open (first in))
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(rest open)
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)))))
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(->> (slurp "./in")
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(clojure.string/split-lines)
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(map (comp to-score check-line vec))
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(filter some?)
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(apply +)
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(println))
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