object Main extends Application {
 
  def circularHash[T](list: List[T])(implicit ord: Ordering[T]): Int = 
    list.sorted.foldLeft(1) { (acc, e) => 
      (31 * acc + (if (e == null) 0 else e.hashCode)) 
    }
 
  def circulars[T](xs: List[T]): List[List[T]] = 
    (xs ++ xs).sliding(xs.size, 1).toList.init
 
  println(circulars("picture".toList))
 
  println(circulars("picture".toList).map { xs => circularHash(xs) })
 
  println(circulars("abhinav".toList))
 
  println(circulars("abhinav".toList).map { xs => circularHash(xs) })
 
}

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