do 2017 day 8

2017/src/day08.clj

@@ -0,0 +1,46 @@
+(ns day08
+  (:require
+   [clojure.string :as str]
+   [core]
+   [input-manager]))
+
+(def op {"inc" +
+         "dec" -})
+(def cond-op {"<" <
+              "<=" <=
+              ">" >
+              ">=" >=
+              "==" =
+              "!=" not=})
+(def input (map (comp
+                 (fn [[name operation num _ cond-name cond-operation cond-val]]
+                   [name
+                    (op operation)
+                    (parse-long num)
+                    cond-name
+                    (cond-op cond-operation)
+                    (parse-long cond-val)])
+                 core/split-whitespace)
+                (input-manager/get-input 2017 8)))
+
+(defn compute [acc [reg reg-op val cond-reg cond-op cond-val]]
+  (if (cond-op (acc cond-reg 0) cond-val)
+    (assoc acc reg (reg-op (acc reg 0) val))
+    acc))
+
+;; part 1
+(->> input
+    (reduce compute {})
+    (sort-by second)
+    last
+    second)
+
+;; part 2
+(->> input
+     (reductions compute {})
+     (mapcat identity)
+     set
+     (sort-by second)
+     last
+     second)
+