Advent of Code 2022-6.scala

import java.io.FileInputStream
import scala.annotation.tailrec
import scala.io.StdIn


def positionOfMarker(input: String, length: Int): Int = {
  input.sliding(length).indexWhere(chars => chars.toSet.size == length) + length
}
def solve6_1(input: String): Int =
  positionOfMarker(input, 4)

def solve6_2(input: String): Int =
  positionOfMarker(input, 14)

@main def solve6(): Unit =
  val in = new FileInputStream("example6-2.in")
  System.setIn(in)
  val input = Iterator.continually(StdIn.readLine()).next()
  println(solve6_1(input))
  println(solve6_2(input))