From 67f118752569b5ad3ca3ff798cca238c175f40c5 Mon Sep 17 00:00:00 2001 From: Alexander Gehrke Date: Thu, 2 Dec 2021 23:35:52 +0100 Subject: [PATCH] day2 --- input/2021/day2-sample1.txt | 6 + input/2021/day2.txt | 1000 +++++++++++++++++ .../scala/de.qwertyuiop.aoc/2021/day2.scala | 24 +- 3 files changed, 1029 insertions(+), 1 deletion(-) create mode 100644 input/2021/day2-sample1.txt create mode 100644 input/2021/day2.txt diff --git a/input/2021/day2-sample1.txt b/input/2021/day2-sample1.txt new file mode 100644 index 0000000..b7172ac --- /dev/null +++ b/input/2021/day2-sample1.txt @@ -0,0 +1,6 @@ +forward 5 +down 5 +forward 8 +up 3 +down 8 +forward 2 diff --git a/input/2021/day2.txt b/input/2021/day2.txt new file mode 100644 index 0000000..d5c08db --- /dev/null +++ b/input/2021/day2.txt @@ -0,0 +1,1000 @@ +forward 9 +forward 9 +forward 3 +down 2 +forward 8 +down 8 +forward 1 +down 6 +down 9 +down 9 +forward 1 +up 5 +up 4 +up 8 +down 6 +down 7 +forward 4 +forward 6 +forward 2 +forward 2 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de.qwertyuiop.aoc.lib.* import cats.*, cats.implicits.given -def day2(using InputSource): Unit = ??? +import Vectors.* + +def day2(using InputSource): Unit = + val commands = input() + println(simpleCommands(commands)) + println(aimCommands(commands)) + + +def simpleCommands(commands: List[String]) = + val finalPos = commands.map{ + case s"forward $x" => Vec2D(x.toInt, 0) + case s"down $y" => Vec2D(0, y.toInt) + case s"up $y" => Vec2D(0, - y.toInt) + }.combineAll + s"(1) Final position: ${finalPos}\nResult: ${finalPos.x * finalPos.y}" + +def aimCommands(commands: List[String]) = + val finalPos = commands.map{ + case s"forward $x" => Vec3D(x.toInt, x.toInt, 0) + case s"down $aim" => Vec3D(0, 0, aim.toInt) + case s"up $aim" => Vec3D(0, 0, - aim.toInt) + }.foldLeft(Vec3D(0,0,0))((pos, command) => Vec3D(pos.x + command.x, pos.y + pos.z * command.y, pos.z + command.z)) + s"(2) Final position: ${finalPos}\nResult: ${finalPos.x * finalPos.y}"