Scala code to solve. http://goo.gl/B2tS9 Google code jam

exception_received

Arrays received
1
3
-5
-2
4
1
scala.MatchError: ArraySeq(-5, 1, 3)
        at Main$$anon$1.scalarProduct$1(minscalarProduct.scala:9)
        at Main$$anon$1.Main$$anon$$minScalarProduct(minscalarProduct.scala:14)
        at Main$$anon$1$$anonfun$processInput$1.apply(minscalarProduct.scala:22)
        at Main$$anon$1$$anonfun$processInput$1.apply(minscalarProduct.scala:21)
        at scala.collection.Iterator$class.foreach(Iterator.scala:631)
        at scala.collection.Iterator$$anon$27.foreach(Iterator.scala:578)
        at Main$$anon$1.processInput(minscalarProduct.scala:21)
        at Main$$anon$1.<init>(minscalarProduct.scala:27)
        at Main$.main(minscalarProduct.scala:1)
        at Main.main(minscalarProduct.scala)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at scala.tools.nsc.util.ScalaClassLoader$$anonfun$run$1.apply(ScalaClassLoader.scala:81)
        at scala.tools.nsc.util.ScalaClassLoader$class.asContext(ScalaClassLoader.scala:24)
        at scala.tools.nsc.util.ScalaClassLoader$URLClassLoader.asContext(ScalaClassLoader.scala:86)
        at scala.tools.nsc.util.ScalaClassLoader$class.run(ScalaClassLoader.scala:81)
        at scala.tools.nsc.util.ScalaClassLoader$URLClassLoader.run(ScalaClassLoader.scala:86)
        at scala.tools.nsc.ScriptRunner$.scala$tools$nsc$ScriptRunner$$runCompiled(ScriptRunner.scala:241)
        at scala.tools.nsc.ScriptRunner$$anonfun$runScript$1.apply(ScriptRunner.scala:265)
        at scala.tools.nsc.ScriptRunner$$anonfun$runScript$1.apply(ScriptRunner.scala:265)
        at scala.tools.nsc.ScriptRunner$$anonfun$withCompiledScript$2.apply(ScriptRunner.scala:225)
        at scala.tools.nsc.ScriptRunner$$anonfun$withCompiledScript$2.apply(ScriptRunner.scala:225)
        at scala.Option.map(Option.scala:129)
        at scala.tools.nsc.ScriptRunner$.withCompiledScript(ScriptRunner.scala:225)
        at scala.tools.nsc.ScriptRunner$.runScript(ScriptRunner.scala:265)
        at scala.tools.nsc.MainGenericRunner$.main(MainGenericRunner.scala:91)
        at scala.tools.nsc.MainGenericRunner.main(MainGenericRunner.scala)

input.txt

2
3
1 3 -5
-2 4 1
5
1 2 3 4 5
1 0 1 0 1

minScalar.scala

def minScalarProduct( x : Seq[Int],y : Seq[Int] ) : Int = {

  println("Arrays received")
  x foreach (println(_))
  y foreach (println(_))
  val sortedX = x.sorted 
  val sortedY= y.sortWith(_>_)

    def scalarProduct(x: Seq[Int], y: Seq[Int] ) : Int = x  match {
    case Seq() => 0
    case x1::xs1 => x1 * y.head + scalarProduct ( xs1, y.tail ) 
  }

  scalarProduct(sortedX,sortedY)

}  

def processInput(source: io.Source) {
  val groups = source.getLines.drop(1).grouped(3) 
  
    groups.zipWithIndex foreach { e =>  
        val solution = minScalarProduct ( e._1(1).split(" ").map(_.toInt),  e._1(2).split(" ").map(_.toInt)) 
        println("Case #"+(e._2+1)+": "+solution)
    }
}

processInput(io.Source.fromFile("input.txt"))