AoC day 3

import scala.io.Source

object day3 extends App {

  def isValid(t: Seq[Int]): Boolean = {
    val (a, b) = t.sorted(Ordering[Int].reverse).splitAt(1)
    a.head < b.foldLeft(0)(_+_)
  }

  val triangles = Source.fromFile("day3.txt").getLines.toList map (l => l.trim split " +" map (x => x.toInt))
  println(triangles.count(isValid(_)))
  val triangles2 = triangles.transpose.map(c => c.grouped(3).toList).flatten
  println(triangles2.count(isValid(_)))

}