https://code.google.com/codejam/contest/6254486/dashboard#s=p0

CountingSheep.scala

package codejam

import java.io.{PrintStream, File}

import scala.annotation.tailrec
import scala.io.Source


object CountingSheep {

  def solve(sheepCount : Int) : String = {
    @tailrec
    def inner(times : Int, set : Set[Char]) : Int = {
      if (sheepCount == 0 || set.size == 10) return sheepCount * (times - 1)
      inner(times + 1, (sheepCount * times).toString.toSet ++ set)
    }
    inner(1, Set()) match {
      case 0 => "INSOMNIA"
      case x => x.toString
    }
  }

  def process(iter: Iterator[String])(pr: String => Unit) {
    for (count <- 1 to iter.next().toInt) yield {
      val sheepCount = iter.next().toInt
      pr(s"Case #$count: ${solve(sheepCount)}")
    }
  }

  def main(args: Array[String]) {
    val in = Source.fromFile(new File("A-large-practice.in"))
    val out = new PrintStream(new File("A-large-practice.out"))
    try {
      process(in.getLines) { s: String => out.println(s) }
    } finally {
      out.flush; out.close
    }
  }
}