Day 5

aoc/resources/day5Input.txt

@@ -0,0 +1,514 @@
+    [B]             [B] [S]        
+    [M]             [P] [L] [B] [J]
+    [D]     [R]     [V] [D] [Q] [D]
+    [T] [R] [Z]     [H] [H] [G] [C]
+    [P] [W] [J] [B] [J] [F] [J] [S]
+[N] [S] [Z] [V] [M] [N] [Z] [F] [M]
+[W] [Z] [H] [D] [H] [G] [Q] [S] [W]
+[B] [L] [Q] [W] [S] [L] [J] [W] [Z]
+ 1   2   3   4   5   6   7   8   9 
+
+move 3 from 5 to 2
+move 5 from 3 to 1
+move 4 from 4 to 9
+move 6 from 1 to 4
+move 6 from 8 to 7
+move 5 from 2 to 7
+move 1 from 5 to 4
+move 11 from 9 to 7
+move 1 from 1 to 9
+move 6 from 4 to 6
+move 12 from 6 to 7
+move 1 from 9 to 2
+move 2 from 4 to 6
+move 1 from 8 to 9
+move 1 from 9 to 4
+move 1 from 6 to 1
+move 2 from 7 to 5
+move 2 from 6 to 7
+move 2 from 1 to 6
+move 2 from 4 to 7
+move 1 from 5 to 4
+move 1 from 5 to 6
+move 1 from 6 to 1
+move 1 from 1 to 3
+move 1 from 4 to 1
+move 1 from 1 to 4
+move 1 from 4 to 5
+move 1 from 3 to 9
+move 1 from 5 to 1
+move 4 from 2 to 1
+move 20 from 7 to 8
+move 24 from 7 to 3
+move 3 from 6 to 4
+move 1 from 1 to 9
+move 1 from 9 to 3
+move 2 from 1 to 2
+move 2 from 4 to 1
+move 2 from 2 to 1
+move 14 from 3 to 6
+move 6 from 1 to 6
+move 10 from 3 to 2
+move 1 from 2 to 3
+move 6 from 6 to 5
+move 2 from 3 to 4
+move 13 from 8 to 4
+move 1 from 9 to 7
+move 1 from 6 to 3
+move 10 from 4 to 2
+move 1 from 3 to 6
+move 2 from 8 to 7
+move 1 from 7 to 2
+move 11 from 6 to 8
+move 2 from 6 to 1
+move 2 from 1 to 3
+move 1 from 8 to 6
+move 1 from 3 to 9
+move 3 from 8 to 2
+move 1 from 3 to 6
+move 2 from 6 to 4
+move 1 from 6 to 5
+move 11 from 2 to 9
+move 2 from 4 to 6
+move 1 from 6 to 1
+move 1 from 1 to 5
+move 11 from 2 to 7
+move 12 from 7 to 5
+move 1 from 6 to 2
+move 10 from 8 to 7
+move 6 from 5 to 3
+move 4 from 5 to 4
+move 11 from 9 to 7
+move 7 from 4 to 9
+move 4 from 9 to 6
+move 12 from 7 to 3
+move 1 from 8 to 9
+move 1 from 5 to 1
+move 1 from 1 to 2
+move 1 from 6 to 9
+move 3 from 4 to 1
+move 1 from 9 to 7
+move 8 from 7 to 2
+move 3 from 6 to 1
+move 8 from 2 to 3
+move 1 from 7 to 4
+move 2 from 7 to 2
+move 1 from 5 to 2
+move 8 from 5 to 1
+move 3 from 9 to 6
+move 1 from 6 to 2
+move 1 from 4 to 5
+move 1 from 5 to 4
+move 2 from 9 to 3
+move 1 from 8 to 6
+move 1 from 4 to 5
+move 1 from 5 to 1
+move 1 from 6 to 8
+move 1 from 8 to 1
+move 7 from 1 to 5
+move 11 from 3 to 7
+move 1 from 1 to 9
+move 4 from 2 to 1
+move 5 from 1 to 3
+move 1 from 5 to 9
+move 1 from 6 to 3
+move 6 from 2 to 1
+move 5 from 7 to 3
+move 1 from 6 to 8
+move 1 from 8 to 4
+move 6 from 7 to 9
+move 4 from 9 to 8
+move 2 from 8 to 9
+move 2 from 5 to 8
+move 13 from 3 to 7
+move 1 from 3 to 8
+move 2 from 1 to 9
+move 3 from 1 to 5
+move 1 from 4 to 1
+move 6 from 5 to 9
+move 8 from 9 to 8
+move 2 from 7 to 3
+move 1 from 9 to 7
+move 1 from 5 to 2
+move 5 from 9 to 8
+move 1 from 8 to 7
+move 1 from 2 to 9
+move 7 from 1 to 2
+move 4 from 7 to 5
+move 6 from 2 to 3
+move 1 from 2 to 1
+move 10 from 8 to 9
+move 3 from 8 to 9
+move 4 from 5 to 1
+move 2 from 8 to 6
+move 9 from 9 to 8
+move 1 from 9 to 6
+move 8 from 8 to 4
+move 12 from 3 to 5
+move 1 from 4 to 2
+move 3 from 8 to 1
+move 3 from 9 to 7
+move 1 from 3 to 2
+move 1 from 6 to 9
+move 8 from 3 to 8
+move 6 from 4 to 5
+move 1 from 7 to 6
+move 1 from 8 to 1
+move 6 from 8 to 7
+move 1 from 3 to 6
+move 7 from 1 to 5
+move 1 from 4 to 9
+move 4 from 6 to 5
+move 13 from 7 to 5
+move 1 from 8 to 2
+move 2 from 9 to 3
+move 4 from 7 to 2
+move 1 from 3 to 8
+move 1 from 3 to 4
+move 4 from 1 to 2
+move 1 from 5 to 7
+move 23 from 5 to 6
+move 1 from 8 to 6
+move 1 from 9 to 4
+move 5 from 2 to 6
+move 1 from 4 to 9
+move 1 from 9 to 3
+move 1 from 7 to 8
+move 1 from 4 to 3
+move 1 from 3 to 7
+move 1 from 7 to 5
+move 1 from 8 to 7
+move 12 from 6 to 1
+move 1 from 2 to 5
+move 1 from 3 to 1
+move 20 from 5 to 2
+move 14 from 2 to 4
+move 11 from 2 to 6
+move 1 from 7 to 8
+move 13 from 1 to 8
+move 9 from 8 to 4
+move 3 from 8 to 6
+move 10 from 6 to 8
+move 6 from 6 to 4
+move 4 from 8 to 5
+move 26 from 4 to 2
+move 2 from 5 to 2
+move 5 from 8 to 1
+move 1 from 8 to 3
+move 2 from 1 to 3
+move 2 from 3 to 7
+move 27 from 2 to 7
+move 2 from 8 to 1
+move 1 from 3 to 7
+move 6 from 6 to 2
+move 4 from 6 to 1
+move 4 from 6 to 4
+move 2 from 5 to 4
+move 4 from 2 to 1
+move 3 from 1 to 8
+move 1 from 2 to 8
+move 8 from 4 to 3
+move 1 from 2 to 8
+move 5 from 8 to 6
+move 1 from 4 to 2
+move 1 from 2 to 1
+move 6 from 3 to 1
+move 13 from 7 to 1
+move 1 from 2 to 8
+move 1 from 8 to 2
+move 1 from 6 to 2
+move 1 from 2 to 8
+move 1 from 8 to 2
+move 14 from 7 to 1
+move 5 from 6 to 3
+move 2 from 3 to 1
+move 3 from 3 to 2
+move 3 from 7 to 4
+move 1 from 4 to 9
+move 1 from 9 to 7
+move 2 from 3 to 6
+move 5 from 2 to 7
+move 1 from 7 to 6
+move 5 from 7 to 6
+move 2 from 6 to 7
+move 1 from 6 to 8
+move 1 from 4 to 7
+move 4 from 6 to 9
+move 35 from 1 to 8
+move 3 from 7 to 2
+move 1 from 2 to 5
+move 24 from 8 to 3
+move 1 from 5 to 8
+move 13 from 3 to 6
+move 2 from 2 to 6
+move 6 from 6 to 4
+move 11 from 1 to 6
+move 12 from 6 to 1
+move 1 from 8 to 1
+move 2 from 1 to 3
+move 5 from 4 to 1
+move 1 from 6 to 4
+move 1 from 8 to 3
+move 13 from 3 to 9
+move 3 from 8 to 2
+move 3 from 2 to 7
+move 1 from 3 to 6
+move 3 from 7 to 8
+move 14 from 1 to 3
+move 1 from 1 to 9
+move 6 from 3 to 8
+move 17 from 8 to 6
+move 1 from 3 to 7
+move 1 from 7 to 8
+move 26 from 6 to 7
+move 1 from 1 to 9
+move 3 from 4 to 1
+move 2 from 3 to 8
+move 1 from 8 to 4
+move 14 from 9 to 7
+move 12 from 7 to 3
+move 2 from 1 to 4
+move 2 from 7 to 8
+move 2 from 8 to 3
+move 4 from 9 to 8
+move 1 from 4 to 7
+move 1 from 1 to 3
+move 2 from 4 to 2
+move 24 from 7 to 6
+move 1 from 8 to 1
+move 1 from 7 to 2
+move 1 from 7 to 9
+move 3 from 2 to 9
+move 1 from 1 to 6
+move 5 from 8 to 2
+move 5 from 3 to 4
+move 1 from 2 to 5
+move 3 from 9 to 8
+move 2 from 4 to 9
+move 16 from 6 to 3
+move 14 from 3 to 8
+move 1 from 7 to 9
+move 8 from 6 to 9
+move 4 from 8 to 5
+move 8 from 8 to 3
+move 1 from 5 to 8
+move 1 from 2 to 4
+move 4 from 8 to 7
+move 1 from 5 to 6
+move 12 from 9 to 5
+move 15 from 5 to 8
+move 1 from 6 to 1
+move 2 from 2 to 6
+move 3 from 4 to 2
+move 4 from 2 to 7
+move 8 from 7 to 3
+move 1 from 1 to 4
+move 3 from 6 to 9
+move 16 from 8 to 3
+move 3 from 9 to 4
+move 1 from 8 to 9
+move 2 from 9 to 4
+move 24 from 3 to 8
+move 19 from 8 to 7
+move 2 from 8 to 7
+move 7 from 4 to 5
+move 13 from 7 to 5
+move 4 from 7 to 8
+move 7 from 8 to 1
+move 3 from 5 to 3
+move 3 from 7 to 2
+move 1 from 1 to 4
+move 1 from 7 to 2
+move 3 from 2 to 4
+move 8 from 3 to 1
+move 11 from 1 to 3
+move 12 from 3 to 4
+move 1 from 2 to 5
+move 18 from 3 to 8
+move 3 from 1 to 9
+move 1 from 3 to 5
+move 15 from 5 to 4
+move 4 from 5 to 1
+move 23 from 4 to 6
+move 3 from 1 to 6
+move 13 from 8 to 3
+move 25 from 6 to 2
+move 1 from 9 to 5
+move 5 from 3 to 8
+move 17 from 2 to 8
+move 4 from 4 to 1
+move 1 from 9 to 7
+move 5 from 2 to 6
+move 2 from 2 to 4
+move 1 from 9 to 4
+move 6 from 3 to 9
+move 16 from 8 to 3
+move 2 from 1 to 8
+move 1 from 7 to 4
+move 5 from 4 to 7
+move 1 from 5 to 3
+move 2 from 7 to 1
+move 9 from 8 to 4
+move 3 from 7 to 2
+move 2 from 8 to 3
+move 10 from 4 to 1
+move 1 from 2 to 3
+move 5 from 3 to 7
+move 2 from 8 to 9
+move 2 from 9 to 8
+move 1 from 2 to 1
+move 3 from 9 to 6
+move 2 from 2 to 8
+move 4 from 7 to 3
+move 4 from 8 to 6
+move 1 from 7 to 1
+move 1 from 4 to 8
+move 4 from 3 to 4
+move 4 from 4 to 2
+move 6 from 1 to 2
+move 1 from 4 to 3
+move 5 from 3 to 8
+move 6 from 3 to 8
+move 2 from 2 to 8
+move 3 from 2 to 9
+move 8 from 1 to 6
+move 3 from 2 to 7
+move 2 from 7 to 2
+move 13 from 6 to 5
+move 7 from 5 to 9
+move 3 from 2 to 7
+move 1 from 2 to 9
+move 2 from 5 to 2
+move 3 from 8 to 5
+move 5 from 3 to 4
+move 2 from 2 to 1
+move 9 from 8 to 7
+move 1 from 1 to 8
+move 6 from 5 to 2
+move 4 from 2 to 8
+move 4 from 7 to 1
+move 1 from 2 to 6
+move 5 from 1 to 6
+move 1 from 8 to 2
+move 1 from 2 to 9
+move 13 from 6 to 5
+move 2 from 7 to 2
+move 1 from 8 to 7
+move 4 from 4 to 7
+move 1 from 4 to 1
+move 4 from 8 to 4
+move 6 from 5 to 9
+move 2 from 1 to 4
+move 1 from 8 to 6
+move 11 from 9 to 5
+move 1 from 7 to 8
+move 1 from 8 to 1
+move 1 from 1 to 3
+move 6 from 4 to 8
+move 1 from 8 to 4
+move 1 from 1 to 6
+move 6 from 9 to 7
+move 1 from 4 to 5
+move 3 from 2 to 1
+move 1 from 8 to 2
+move 1 from 3 to 2
+move 20 from 5 to 6
+move 3 from 1 to 6
+move 2 from 2 to 9
+move 3 from 8 to 3
+move 5 from 3 to 8
+move 1 from 1 to 6
+move 2 from 8 to 9
+move 7 from 9 to 5
+move 3 from 5 to 4
+move 3 from 8 to 3
+move 9 from 7 to 9
+move 1 from 8 to 5
+move 7 from 7 to 9
+move 2 from 5 to 2
+move 9 from 9 to 2
+move 1 from 7 to 3
+move 2 from 9 to 1
+move 2 from 5 to 9
+move 2 from 1 to 4
+move 2 from 3 to 7
+move 18 from 6 to 7
+move 7 from 9 to 1
+move 7 from 6 to 8
+move 4 from 4 to 9
+move 4 from 8 to 3
+move 2 from 8 to 2
+move 1 from 8 to 5
+move 1 from 4 to 7
+move 1 from 5 to 1
+move 2 from 9 to 3
+move 12 from 2 to 5
+move 6 from 5 to 6
+move 5 from 7 to 2
+move 3 from 6 to 4
+move 1 from 4 to 7
+move 1 from 4 to 1
+move 2 from 5 to 8
+move 1 from 8 to 2
+move 2 from 9 to 7
+move 8 from 1 to 8
+move 11 from 7 to 1
+move 5 from 8 to 2
+move 7 from 7 to 5
+move 1 from 9 to 4
+move 1 from 7 to 5
+move 7 from 5 to 7
+move 2 from 6 to 1
+move 1 from 8 to 2
+move 12 from 1 to 7
+move 2 from 1 to 2
+move 3 from 8 to 5
+move 3 from 5 to 2
+move 8 from 7 to 3
+move 1 from 3 to 1
+move 3 from 6 to 4
+move 4 from 5 to 6
+move 14 from 2 to 9
+move 3 from 6 to 9
+move 3 from 4 to 2
+move 1 from 1 to 7
+move 1 from 7 to 1
+move 3 from 3 to 5
+move 8 from 7 to 4
+move 1 from 5 to 9
+move 3 from 2 to 4
+move 1 from 3 to 4
+move 4 from 2 to 6
+move 2 from 6 to 7
+move 3 from 5 to 4
+move 16 from 4 to 1
+move 7 from 9 to 8
+move 1 from 5 to 1
+move 3 from 7 to 9
+move 3 from 9 to 4
+move 7 from 1 to 7
+move 6 from 7 to 1
+move 5 from 3 to 1
+move 11 from 9 to 2
+move 3 from 4 to 6
+move 9 from 2 to 8
+move 6 from 3 to 5
+move 2 from 8 to 6
+move 5 from 5 to 3
+move 2 from 7 to 1
+move 3 from 3 to 9
+move 1 from 2 to 4
+move 1 from 5 to 1
+move 13 from 1 to 2
+move 5 from 8 to 6
+move 2 from 3 to 9
+move 2 from 4 to 7
+move 5 from 6 to 9
+move 7 from 9 to 1
+move 3 from 7 to 2
+move 6 from 8 to 6
+move 5 from 6 to 2
+move 2 from 8 to 3
+move 2 from 9 to 4
+move 6 from 2 to 5
+move 1 from 3 to 7

aoc/src/Day5.scala

@@ -0,0 +1,49 @@
+import scala.io.Source
+import scala.collection.mutable.Stack
+
+object Day5 extends App:
+
+  val input = Source
+    .fromURL(getClass.getResource("day5Input.txt"))
+    .mkString
+    .split('\n')
+    .toList
+
+  val crates = input
+    .takeWhile(_ != "")
+    .dropRight(1)
+    .map(_.grouped(4).toList)
+    .transpose
+    .map(_.flatMap(_.find(_.isLetter)))
+    .toArray
+
+  val moves = input
+    .dropWhile(_ != "")
+    .tail
+    .map(_.split(" ").flatMap(_.toIntOption))
+    .map { case Array(count, from, to) => (count, from - 1, to - 1) }
+
+  val part1 = moves
+    .foldLeft(crates) { case (crates, (count, from, to)) =>
+      val movedCrates = crates(from).take(count)
+      crates
+        .updated(from, crates(from).drop(count))
+        .updated(to, crates(to).prependedAll(movedCrates.reverse))
+    }.toList
+    .map(_.head)
+    .mkString
+
+  println(s"Part 1: $part1")
+
+  val part2 = moves
+    .foldLeft(crates) { case (crates, (count, from, to)) =>
+      val movedCrates = crates(from).take(count)
+      crates
+        .updated(from, crates(from).drop(count))
+        .updated(to, crates(to).prependedAll(movedCrates))
+    }.toList
+    .map(_.head)
+    .mkString
+
+  println(s"Part 2: $part2")
+end Day5