2 files changed, 71 insertions, 0 deletions
diff --git a/src/aoc_2022/day02.clj b/src/aoc_2022/day02.clj
new file mode 100644
index 0000000..45bba95
--- /dev/null
+++ b/src/aoc_2022/day02.clj
@@ -0,0 +1,68 @@
+(ns aoc-2022.day02)
+(require '[clojure.java.io :as io])
+(require '[aoc-2022.utils :as utils])
+
+(defn score-round-result [own opp]
+  (cond
+    (= own opp) 3
+    (and (= own :rock) (= opp :scissors)) 6
+    (and (= own :rock) (= opp :paper)) 0
+    (and (= own :paper) (= opp :scissors)) 0
+    (and (= own :paper) (= opp :rock)) 6
+    (and (= own :scissors) (= opp :paper)) 6
+    (and (= own :scissors) (= opp :rock)) 0))
+
+(def score-own-play
+  {:rock     1
+   :paper    2
+   :scissors 3})
+
+(defn score-round [own opp]
+  (+ (score-round-result own opp) (get score-own-play own)))
+
+(def plays
+  {\A :rock
+   \B :paper
+   \C :scissors
+   \X :rock
+   \Y :paper
+   \Z :scissors})
+
+(defn score-round [own opp]
+  (+ (score-round-result own opp) (score-own-play own)))
+
+(defn task1 [rows]
+  (->> rows
+       (map (fn [[opp _ own]] `(~(get plays own) ~(get plays opp))))
+       (map (fn [[own opp]] (score-round own opp)))
+       (reduce +)
+       ))
+
+(def results
+  {\X :lose
+   \Y :draw
+   \Z :win})
+
+(def own-play
+  {'(:lose :rock)     :scissors
+   '(:lose :paper)    :rock
+   '(:lose :scissors) :paper
+   '(:draw :rock)     :rock
+   '(:draw :paper)    :paper
+   '(:draw :scissors) :scissors
+   '(:win  :rock)     :paper
+   '(:win  :paper)    :scissors
+   '(:win  :scissors) :rock})
+
+(defn task2 [rows]
+  (->> rows
+       (map (fn [[opp _ res]] `(~(get results res) ~(get plays opp))))
+       (map (fn [[res opp]] [(get own-play `(~res ~opp)) opp]))
+       (map (fn [[own opp]] (score-round own opp)))
+       (reduce +)))
+
+(with-open [rdr (io/reader "resources/day02_actual.txt")]
+  (let [rows (line-seq rdr)]
+    (do
+      (println "task1:" (task1 rows))
+      (println "task2:" (task2 rows)))))
diff --git a/src/aoc_2022/utils.clj b/src/aoc_2022/utils.clj
new file mode 100644
index 0000000..57bfa88
--- /dev/null
+++ b/src/aoc_2022/utils.clj
@@ -0,0 +1,3 @@
+(ns aoc-2022.utils)
+
+(def spy #(do (println "DEBUG:" %) %))