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PrefixTree

Реализовать интерфейс PrefixTree Интерфейс позволяет складывать объекты произвольного класса V по заданному "пути" Seq[K] в дерево и изымать их используя комбинацию методов sub и get

Например, можно на каждом "уровне" дерева хранить Option[V] и Map[K, PrefixTree[K, V]]

trait PrefixTree[K, +V] {
  def put[U >: V](path: Seq[K], value: U): PrefixTree[K, U]

  def sub(path: Seq[K]): PrefixTree[K, V]
  def get: V
}

Заготовка находится в PrefixTree.scala

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