Scala programs are compiled on the server by the Scala 2.11.2. The compiler is invoked with the following parameters:

scalac -optimise -feature %1

Solutions are executed by the Java 8 interpreter:

java -client -Xmx544m -Xss64m -DONLINE_JUDGE
    -classpath .;scala-library.jar YourClassName

You can find the compiler here.

Examples of solving problems

A sample solution for the 1000. A + B problem in Scala:

object Main extends App {
   println(readLine().split(" ").map(_.toInt).sum)
}

You can also use standard JDK classes:

import java.util.Scanner
object Sum {
   def main(args: Array[String]) {
      val in = new Scanner(System.in)
      println(in.nextInt() + in.nextInt())
      in.close()
   }
}

A sample solution for the 1001. Reverse Root in Scala:

import io.Source
object ReverseRoot extends App {
   val longs = Source.stdin.getLines().flatMap(
      _.split(" ").filter(!_.isEmpty).map(_.toLong)).toArray
   println(longs.reverse.map(t => math.sqrt(t)).mkString("\n"))
}

Earlier compilers

• The Scala 2.10.1 was used until October, 3 2014.