1 files changed, 0 insertions, 99 deletions
diff --git a/2021-kotlin/src/Day13.kt b/2021-kotlin/src/Day13.kt
deleted file mode 100644
index 0f9b096..0000000
--- a/2021-kotlin/src/Day13.kt
+++ /dev/null
@@ -1,99 +0,0 @@
-object Day13 {
-    private sealed class FoldCommand {
-        abstract fun dispatch(dots: Set<Pos2D>): Set<Pos2D>
-
-        class AlongX(private val x: Int) : FoldCommand() {
-            override fun dispatch(dots: Set<Pos2D>): Set<Pos2D> = dots
-                .filter { it.x != x }
-                .map {
-                    if (it.x < x) {
-                        it
-                    } else {
-                        Pos2D(2 * x - it.x, it.y)
-                    }
-                }
-                .toSet()
-        }
-
-        class AlongY(private val y: Int) : FoldCommand() {
-            override fun dispatch(dots: Set<Pos2D>): Set<Pos2D> = dots
-                .filter { it.y != y }
-                .map {
-                    if (it.y < y) {
-                        it
-                    } else {
-                        Pos2D(it.x, 2 * y - it.y)
-                    }
-                }
-                .toSet()
-        }
-    }
-
-    private fun parseOrigami(input: List<String>): Pair<Set<Pos2D>, Sequence<FoldCommand>> {
-        val dots = mutableSetOf<Pos2D>()
-        val commands = mutableListOf<FoldCommand>()
-
-        for (line in input) {
-            if (line.matches("\\d+,\\d+".toRegex())) {
-                val (x, y) = line.split(",").map(String::toInt)
-                dots.add(Pos2D(x, y))
-            }
-
-            if (line.matches("fold along [xy]=\\d+".toRegex())) {
-                val equation = line.substring(11)
-                val (axis, valueString) = equation.split("=")
-                val value = valueString.toInt()
-
-                commands.add(
-                    when (axis) {
-                        "x" -> FoldCommand.AlongX(value)
-                        "y" -> FoldCommand.AlongY(value)
-                        else -> throw IllegalStateException("Illegal axis given!")
-                    }
-                )
-            }
-        }
-
-        return dots to commands.asSequence()
-    }
-
-    fun part1(input: List<String>): Int {
-        val (dots, commands) = parseOrigami(input)
-
-        return commands.first().dispatch(dots).size
-    }
-
-    fun part2(input: List<String>): String {
-        val origami = parseOrigami(input)
-        var dots = origami.first
-        val commands = origami.second
-
-        commands.forEach {
-            dots = it.dispatch(dots)
-        }
-
-        val bounds = dots.reduce { max, pos ->
-            when ((pos.x > max.x) to (pos.y > max.y)) {
-                true to true -> pos
-                true to false -> Pos2D(pos.x, max.y)
-                false to true -> Pos2D(max.x, pos.y)
-                else -> max
-            }
-        }
-
-        val lines = Array(bounds.y + 1) { Array(bounds.x + 1) { ' ' } }
-
-        dots.forEach { lines[it.y][it.x] = '#' }
-
-        return lines.joinToString("\n") { it.joinToString("") }
-    }
-}
-
-fun main() {
-    val testInput = readInputAsLines("Day13_test")
-    check(Day13.part1(testInput) == 17)
-
-    val input = readInputAsLines("Day13")
-    println(Day13.part1(input))
-    println(Day13.part2(input))
-}