Solve 2023 day 6 part 1

src/main/resources/eu/sim642/adventofcode2023/day6.txt

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+Time:        48     93     85     95
+Distance:   296   1928   1236   1391

src/main/scala/eu/sim642/adventofcode2023/Day6.scala

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+package eu.sim642.adventofcode2023
+
+object Day6 {
+
+  case class Race(time: Int, recordDistance: Int) {
+    def wins: Int = {
+      (0 to time).count(t => t * (time - t) > recordDistance)
+    }
+  }
+
+  def multiplyRaceWins(races: Seq[Race]): Int = races.map(_.wins).product
+
+
+  def parseRaces(input: String): Seq[Race] = input.linesIterator.toSeq match {
+    case Seq(s"Time:$timesStr", s"Distance:$distancesStr") =>
+      val times = timesStr.trim.split(" +").map(_.toInt).toSeq
+      val distances = distancesStr.trim.split(" +").map(_.toInt).toSeq
+      (times lazyZip distances).map(Race.apply)
+  }
+
+  lazy val input: String = io.Source.fromInputStream(getClass.getResourceAsStream("day6.txt")).mkString.trim
+
+  def main(args: Array[String]): Unit = {
+    println(multiplyRaceWins(parseRaces(input)))
+  }
+}

src/test/scala/eu/sim642/adventofcode2023/Day6Test.scala

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+package eu.sim642.adventofcode2023
+
+import Day6._
+import org.scalatest.funsuite.AnyFunSuite
+
+class Day6Test extends AnyFunSuite {
+
+  private val exampleInput =
+    """Time:      7  15   30
+      |Distance:  9  40  200""".stripMargin
+
+  test("Part 1 examples") {
+    assert(multiplyRaceWins(parseRaces(exampleInput)) == 288)
+  }
+
+  test("Part 1 input answer") {
+    assert(multiplyRaceWins(parseRaces(input)) == 2756160)
+  }
+}