Day 1

aoc/src/Day1.scala

@@ -0,0 +1,23 @@
+import scala.io.Source
+
+object Day1 extends App:
+
+  val calories = Source
+    .fromURL(getClass.getResource("day1Input.txt"))
+    .mkString
+    .split('\n')
+    .toList
+
+  val elvesCalories = calories
+    .foldLeft(List(0)) {
+      case (elvesTotal, caloriesValue) if caloriesValue.isEmpty =>
+        0 :: elvesTotal
+      case (elfTotal :: elveTotal, caloriesValue) =>
+        caloriesValue.toInt + elfTotal :: elveTotal
+    }
+
+  println(s"Part 1: ${elvesCalories.max}")
+
+  val top3ElvesCalories = elvesCalories.sorted.takeRight(3).sum
+
+  println(s"Part 2: ${top3ElvesCalories}")