do 2017 day 10

2026-05-04 08:47:45 -04:00
parent 0aed472a32
commit a6e6f2e9f4
1 changed files with 56 additions and 0 deletions
@@ -0,0 +1,56 @@
+(ns day10
+  (:require
+   [clojure.string :as str]
+   [input-manager]))
+
+(def input (input-manager/get-input-raw 2017 10))
+
+(defn pinch-and-rotate [data pos length]
+  (->> data
+       cycle
+       (drop pos)
+       (take length)
+       reverse
+       (map-indexed vector)
+       (reduce (fn [acc [idx el]]
+                 (assoc acc (mod (+ pos idx) (count data)) el))
+               data)))
+
+(defn part-one [list-size input]
+  (->> (mapv parse-long (str/split input #","))
+       (map-indexed vector)
+       (reduce (fn [{:keys [data pos]}
+                    [skip-size el]]
+                 {:data (pinch-and-rotate data pos el)
+                  :pos (+ pos skip-size el)})
+               {:data (vec (range list-size))
+                :pos 0})
+       :data
+       (take 2)
+       (apply *)))
+(part-one 256 input)
+(char 65)
+
+(do
+  (def suffix [17, 31, 73, 47, 23])
+  (defn part-two [data lengths]
+    (let [lengths (vec (concat (map int lengths) suffix))]
+      (->> (reduce (fn [acc _]
+                     (reduce (fn [{:keys [data pos skip]}
+                                  el]
+                               {:data (pinch-and-rotate data pos el)
+                                :skip (inc skip)
+                                :pos (+ pos skip el)})
+                             acc
+                             lengths))
+                   {:data (vec (concat data suffix))
+                    :pos 0
+                    :skip 0}
+                   (range 64))
+           :data
+           #_(partition 16)
+           #_(map #(apply bit-xor %))
+           #_(map #(Long/toHexString %))
+           #_(apply str))))
+  (part-two (mapv parse-long (str/split input #",")) input))
+(part-two (map int "1,2,3") [3 4 5 7])