SmoothingWindow.scala

import java.io.FileOutputStream
import scala.io.Source

object SmoothingWindow {
  def solve(in: Seq[String]) = {
    val Array(n,k) = in.head.split(" ").map(_.toInt)
    val list = in(1).split(" ").map(_.toInt)

    val ret = (k until n).foldLeft(Array.fill[Int](n)(0)) {
      case (arr, i) =>
        arr(i) = arr(i - k) + list(i- k + 1) - list(i - k)
        arr
    }
    println(ret.mkString(","))


    1
  }


  def main(args: Array[String]): Unit = {
    val INPUT = "test.in"
    val OUTPUT = INPUT.takeWhile(_ != '.') + ".out"
    val isConsole = true

    val itr = Source.fromFile(INPUT).getLines()
    val stream = if (isConsole) Console.out else new FileOutputStream(OUTPUT)
    try {
      Console.withOut(stream) {
        val sets = itr.next().toInt
        (1 to sets).foreach { set =>
          val seq = Seq(itr.next(),itr.next())
          println(f"Case #$set: ${solve(seq)}")
        }
      }
    } finally {
      stream.flush()
      if (!isConsole) stream.close()
    }
  }
}