cngdean

object hackerrank {
  object Solution {
    def main(args: Array[String]) {
      def fact(n: Int): Int = if (n == 1) 1 else n * fact(n - 1)

      for (n <- io.Source.stdin.getLines) {
        print(fact(Integer.parseInt(n.toString)) + "\n")
      }
    }
  }