From 12b957a64d0764105bc5b01b6d7b335ca54a3162 Mon Sep 17 00:00:00 2001
From: dnutiu <denis.nutiu@gmail.com>
Date: Mon, 4 Dec 2023 18:24:13 +0200
Subject: [PATCH] =?UTF-8?q?=F0=9F=8E=84Advent=20of=20Code=20-=20Day=204=20?=
 =?UTF-8?q?=E2=9C=A8=20part=202?=
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---
 .../kotlin/AdventOfCode2023/day4/Scratchcards.kt    | 13 ++++++-------
 src/main/kotlin/Main.kt                             |  6 +++++-
 2 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/src/main/kotlin/AdventOfCode2023/day4/Scratchcards.kt b/src/main/kotlin/AdventOfCode2023/day4/Scratchcards.kt
index bfeec2e..6786fa7 100644
--- a/src/main/kotlin/AdventOfCode2023/day4/Scratchcards.kt
+++ b/src/main/kotlin/AdventOfCode2023/day4/Scratchcards.kt
@@ -3,7 +3,7 @@ package AdventOfCode2023.day4
 import AdventOfCode.Puzzle
 import kotlin.collections.ArrayDeque
 
-data class Card(val number: Int, val data: String)
+data class Card(val number: Int, val wonCards: Int)
 
 class Scratchcards : Puzzle("2023", "4") {
     override fun partOne() {
@@ -26,14 +26,13 @@ class Scratchcards : Puzzle("2023", "4") {
 
     override fun partTwo() {
         var cardsTotal = 0
-        val cardsList = inputData.mapIndexed { index, s -> Card(index + 1, s) }.toList()
+        val cardsList = inputData.mapIndexed { index, s -> Card(index + 1, getWinningNumbersForCard(s)) }.toList()
 
         val stack = ArrayDeque(cardsList)
         while (!stack.isEmpty()) {
             val card = stack.removeFirst()
-            val wonCards = getWinningNumbersForCard(card)
-            if (wonCards > 0) {
-                val wonCardsList = cardsList.slice(card.number..<card.number+wonCards)
+            if (card.wonCards > 0) {
+                val wonCardsList = cardsList.slice(card.number..<card.number+card.wonCards)
                 wonCardsList.forEach { stack.addLast(it) }
             }
             cardsTotal += 1
@@ -42,9 +41,9 @@ class Scratchcards : Puzzle("2023", "4") {
     }
 
     private fun getWinningNumbersForCard(
-        card: Card,
+        card: String,
     ): Int {
-        val parts = card.data.split("|")
+        val parts = card.split("|")
         val cleanParts = parts[1].split(Regex("\\s")).filter { it != "" }.toSet()
         val winningNumbers = parts[0].split(":")[1].split(Regex("\\s")).filter { it != "" }.toSet()
         return winningNumbers.filter { number -> cleanParts.contains(number) }.count()
diff --git a/src/main/kotlin/Main.kt b/src/main/kotlin/Main.kt
index 98a29e8..63dc290 100644
--- a/src/main/kotlin/Main.kt
+++ b/src/main/kotlin/Main.kt
@@ -1,7 +1,11 @@
 import AdventOfCode2023.day4.Scratchcards
+import kotlin.system.measureTimeMillis
 
 fun main(args: Array<String>) {
     val t = Scratchcards()
     // t.partOne()
-    t.partTwo()
+    val time = measureTimeMillis {
+        t.partTwo()
+    }
+    println("Took $time ms.")
 }
\ No newline at end of file