aaa

2021/src/main/kotlin/Day10.kt

@@ -50,12 +50,7 @@ class Day10 : BaseDay() {
                     stack.add(char)
                 }
             }
-            var score = 0L
-            stack.asReversed().forEach {
-                score *= 5
-                score += points[it]!!
-            }
-            score
+            stack.foldRight(0L) { char, score -> score * 5 + points[char]!! }
         }.sorted().let { it[it.size / 2] }
     }
 }