From 4bdfc14dcd27c4ef398ac669eac0f40f13ab8aba Mon Sep 17 00:00:00 2001
From: Christian <me@ctsk.xyz>
Date: Tue, 3 Dec 2024 16:47:09 +0100
Subject: [PATCH] Use match gropus & interpolation

---
 aoc/src/dev/ctsk/aoc/days/Day03.scala | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/aoc/src/dev/ctsk/aoc/days/Day03.scala b/aoc/src/dev/ctsk/aoc/days/Day03.scala
index 64a0362..27d81f9 100644
--- a/aoc/src/dev/ctsk/aoc/days/Day03.scala
+++ b/aoc/src/dev/ctsk/aoc/days/Day03.scala
@@ -3,23 +3,24 @@ package dev.ctsk.aoc.days
 import dev.ctsk.aoc._
 
 object Day03 extends Solver(3):
-  def mul(segment: String): Int =
-    segment.substring(4, segment.length - 1).split(",").map(_.toInt).product
-
   def part1(input: String): Int =
-    val pattern = """mul\(\d{1,3},\d{1,3}\)""".r
-    pattern.findAllIn(input).toList.map(mul).sum
+    val pattern = """mul\((\d{1,3}),(\d{1,3})\)""".r
+    pattern
+      .findAllIn(input)
+      .matchData
+      .map(m => m.group(1).toInt * m.group(2).toInt)
+      .sum
 
   def part2(line: String): Int =
     val pattern = """(mul\(\d{1,3},\d{1,3}\))|do\(\)|don't\(\)""".r;
-
     pattern
       .findAllIn(line)
       .foldLeft((true, 0)) { case ((enabled, sum), curr) =>
         curr match
           case "do()"    => (true, sum)
           case "don't()" => (false, sum)
-          case _         => (enabled, if enabled then sum + mul(curr) else sum)
+          case s"mul($a,$b)" =>
+            (enabled, if enabled then sum + a.toInt * b.toInt else sum)
       }
       ._2