1 files changed, 22 insertions, 0 deletions
diff --git a/year2021/day10/part1.clj b/year2021/day10/part1.clj
new file mode 100644
index 0000000..60ed1e6
--- /dev/null
+++ b/year2021/day10/part1.clj
@@ -0,0 +1,22 @@
+(def to-closing {\{ \} \( \) \[ \] \< \>})
+(def to-score {\) 3 \] 57 \} 1197 \> 25137})
+
+(defn check-line [input]
+  (loop [in input open '()]
+    (when-let [c (first in)]
+      (if (some->> (#{\} \) \] \>} c) (not= (first open)))
+        c
+        (recur
+          (rest in)
+          (if-let [op (to-closing c)]
+            (conj open op)
+            (rest open)
+            ))))))
+
+(->> (slurp "./in")
+     (clojure.string/split-lines)
+     (map (comp to-score check-line vec))
+     (filter some?)
+     (apply +)
+     (println))
+