You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
29 lines
634 B
Clojure
29 lines
634 B
Clojure
(def to-closing {\{ \} \( \) \[ \] \< \>})
|
|
(def to-score {\) 3 \] 57 \} 1197 \> 25137})
|
|
|
|
(defn check-line [input]
|
|
(loop [open [] in input]
|
|
(cond
|
|
(empty? in)
|
|
nil
|
|
(and (contains? #{\} \) \] \>} (first in))
|
|
(not= (to-closing (first open)) (first in)))
|
|
(first in)
|
|
:else
|
|
(recur
|
|
(if (contains? #{\{ \( \[ \<} (first in))
|
|
(concat [(first in)] open)
|
|
(rest open))
|
|
(rest in)
|
|
))))
|
|
|
|
(->> (slurp "./in")
|
|
(clojure.string/split-lines)
|
|
(mapv vec)
|
|
(mapv check-line)
|
|
(filter some?)
|
|
(mapv to-score)
|
|
(apply +)
|
|
(println))
|
|
|