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.
|
|
|
|
(def input (->> (slurp "./in")
|
|
|
|
|
(clojure.string/split-lines)
|
|
|
|
|
(mapv (partial mapv (comp read-string str)))
|
|
|
|
|
(#(for [y (range 0 (count %)) x (range 0 (count (first %)))]
|
|
|
|
|
{[y x] (get-in % [y x])}))
|
|
|
|
|
(into {})))
|
|
|
|
|
|
|
|
|
|
(def dim (apply max (map first (keys input))))
|
|
|
|
|
|
|
|
|
|
(defn find-neighbors [u]
|
|
|
|
|
(filter #(contains? input %) [(update u 0 inc)
|
|
|
|
|
(update u 0 dec)
|
|
|
|
|
(update u 1 inc)
|
|
|
|
|
(update u 1 dec)]))
|
|
|
|
|
|
|
|
|
|
(loop [dist (zipmap (keys input) (repeat ##Inf))
|
|
|
|
|
Q {[0 0] 0}]
|
|
|
|
|
(if (empty? Q)
|
|
|
|
|
(println (dist [dim dim]))
|
|
|
|
|
(let [[u distu] (first Q)
|
|
|
|
|
NN (reduce
|
|
|
|
|
#(let [dv (+ distu (input %2))]
|
|
|
|
|
(cond-> %1
|
|
|
|
|
(> ((first %1) %2) dv)
|
|
|
|
|
(-> (update 0 assoc %2 dv)
|
|
|
|
|
(update 1 assoc %2 dv))))
|
|
|
|
|
[dist {}]
|
|
|
|
|
(find-neighbors u))]
|
|
|
|
|
(recur (first NN) (sort-by val < (into (rest Q) (second NN)))))))
|
|
|
|
|
|
