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.
61 lines
1.8 KiB
Clojure
61 lines
1.8 KiB
Clojure
(require '[clojure.core.reducers :as r])
|
|
(require '[clojure.string :as str])
|
|
|
|
(def input (->> (slurp "./in")
|
|
(str/split-lines)
|
|
(map
|
|
(fn [line]
|
|
[(if (str/starts-with? line "on") true false)
|
|
(->> (str/split line #"[^-\d]+")
|
|
(rest)
|
|
(map #(Integer/parseInt %))
|
|
(partition 2)
|
|
(mapv vec))]))
|
|
(reverse)))
|
|
|
|
(defn build-coord-list [coords idx]
|
|
(->> coords
|
|
(map #(update (get (second %) idx) 1 inc))
|
|
(flatten)
|
|
(sort)
|
|
(vec)))
|
|
|
|
(defn filter-coord-list [coords idx v]
|
|
(filter
|
|
#(let [[p0 p1] (get (second %) idx)]
|
|
(and (<= p0 v) (<= v p1)))
|
|
coords))
|
|
|
|
(def xs (build-coord-list input 0))
|
|
(def ys (build-coord-list input 1))
|
|
(def zs (build-coord-list input 2))
|
|
|
|
(defonce on-count (atom 0))
|
|
|
|
(loop [x xs]
|
|
(when-not (empty? (rest x))
|
|
(println "x=" (first x))
|
|
(let [inputx (filter-coord-list input 0 (first x))]
|
|
(swap! on-count +
|
|
(r/fold
|
|
32
|
|
+
|
|
(fn [onc2 iy]
|
|
(let [inputy (filter-coord-list inputx 1 (get ys iy))]
|
|
(+ onc2
|
|
(reduce
|
|
(fn [onc iz]
|
|
(let [inputz (first (filter-coord-list inputy 2 (get zs iz)))]
|
|
(cond-> onc
|
|
(first inputz)
|
|
(+ (* (- (second x) (first x))
|
|
(- (get ys (inc iy)) (get ys iy))
|
|
(- (get zs (inc iz)) (get zs iz)))))))
|
|
0
|
|
(range 0 (dec (count zs)))))))
|
|
(into [] (range 0 (dec (count ys))))))
|
|
(recur (rest x)))))
|
|
|
|
(println @on-count)
|
|
|