Day 01

src/day01.scala

@@ -0,0 +1,36 @@
+package aoc
+package day01
+
+val dayNumber = "01"
+
+@main def part1: Unit =
+  println(part1(loadInput(dayNumber)))
+
+@main def part2: Unit =
+  println(part2(loadInput(dayNumber)))
+
+def part1(input: String): String =
+  val Array(ls, rs) = input
+    .split("\n")
+    .map { case s"$left   $right" =>
+      Array(left.toInt, right.toInt)
+    }
+    .transpose
+
+  ls.sorted
+    .zip(rs.sorted)
+    .map { case (left, right) =>
+      Math.abs(right - left)
+    }
+    .sum
+    .toString
+
+def part2(input: String): String =
+  val Array(ls, rs) = input
+    .split("\n")
+    .map { case s"$left   $right" =>
+      Array(left.toInt, right.toInt)
+    }
+    .transpose
+
+  ls.map(n => n * rs.count(_ == n)).sum.toString