🎄Advent of Code - Refactor Day 6 with JetBrains AI ✨

src/main/kotlin/AdventOfCode2023/day6/WaitForIt.kt

@@ -5,8 +5,7 @@ import AdventOfCode.Puzzle
 data class Race(val raceTime: Long, val distance: Long)
 class WaitForIt : Puzzle("2023", "6") {
 
-    fun getRaceTimesPart1(): List<Race> {
-        return inputData.map {
+    private fun getRaceTimesPart1(): List<Race> = inputData.map {
         // Split on spaces, ignore first item, transform tokens to integers
         it.split(Regex("\\s")).drop(1).map { it.trim().toLongOrNull() }.filterNotNull()
     }.zipWithNext().map {
@@ -15,27 +14,19 @@ class WaitForIt : Puzzle("2023", "6") {
     }.flatten().also {
         println("The input is $it")
     }
-    }
 
     override fun partOne() {
         getRaceTimesPart1().map {
             // here we transform a race into a list of all the possible combinations that we can have
-            (1..<it.raceTime).map { time -> Race((it.raceTime - time) * time, it.distance) }
-        }.parallelStream().map {
-            // Here we filter out the losing races
-            it.filter { it.raceTime > it.distance }.count()
-        }.reduce { acc, i -> acc * i }.get().also {
+            (1..<it.raceTime).count { time -> (it.raceTime - time) * time > it.distance }
+        }.reduce { acc, i -> acc * i }.also {
             println("The number of ways the record was beaten $it.")
         }
     }
 
     override fun partTwo() {
         listOf(Race(49787980, 298118510661181)).map {
-            // here we transform a race into a list of all the possible combinations that we can have
-            (1..<it.raceTime).map { time -> Race((it.raceTime - time) * time, it.distance) }
-        }.map {
-            // Here we filter out the losing races
-            it.parallelStream().filter { it.raceTime > it.distance }.count()
+            (1..<it.raceTime).count { time -> (it.raceTime - time) * time > it.distance }
         }.reduce { acc, i -> acc * i }.also {
             println("The number of ways the record was beaten $it.")
         }

src/main/kotlin/Main.kt

@@ -4,7 +4,7 @@ import kotlin.system.measureTimeMillis
 fun main(args: Array<String>) {
     val t = WaitForIt()
     val time = measureTimeMillis {
-//        t.partOne()
+         t.partOne()
          t.partTwo()
     }
     println("Took $time ms.")