2022 Day 1 in Scala3

2022/day1.scala

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+import scala.collection.mutable.ArrayBuffer
+import scala.io.Source
+
+class Elf:
+	var foodCalories = List[Int]()
+	var totalCalories = 0
+
+	def calculateTotalCalories(): Int =
+		totalCalories = foodCalories.sum
+		totalCalories
+end Elf
+
+
+val filename = "day1-input"
+
+
+@main def main() =
+	val elves = ArrayBuffer[Elf](Elf())
+	for (line <- Source.fromFile(filename).getLines)
+		if line.isEmpty then
+			elves.last.calculateTotalCalories()
+			elves.addOne(Elf())
+		else
+			elves.last.foodCalories = line.toInt :: elves.last.foodCalories
+	elves.last.calculateTotalCalories()
+
+	// for (elf <- elves)
+	// 	println(s"${elf.totalCalories}: ${elf.foodCalories}")
+
+	// Part 1 solution: Total calories held by elf with the most total calories
+	println(s"${elves.map(elf => elf.totalCalories).max}")
+	// Part 2 solution: Total calories held by the top 3 elves
+	println(s"${elves.map(elf => elf.totalCalories).sorted.takeRight(3).sum}")