AdventOfCode 2022

Day6.scala

object Day6 extends Day :


  def part1(input: Iterator[String]) =
    markerFinder(input, 4)

  private def markerFinder(input: Iterator[String], length: Int): String = {
    input.map(_
      .sliding(length)
      .map(_.toSet.size)
      .zipWithIndex
      .collectFirst {
        case (`length`, i) => i + length
      }.get
    ).mkString(" ")
  }

  def part2(input: Iterator[String]) =
    markerFinder(input, 14)