code: from __future__ import annotations
  
  class 				_lowercase						:
  
  
  
  
  
  
      '''simple docstring'''
  
  
  
  
      def __init__(						self					,	lowerCamelCase__   ):
         lowerCAmelCase_:       Tuple         =  data
         lowerCAmelCase_:       str         =  None
  
  
  
  
  
  class 				_lowercase						:
  
  
  
  
  
  
      '''simple docstring'''
  
  
  
  
      def __init__(						self   ):
         lowerCAmelCase_:       Dict         =  None
  
  
  
  
      def     _a						(						self					,	lowerCamelCase__   ):
         lowerCAmelCase_:       Union[str, Any]         =  Node(lowerCamelCase__   )
         lowerCAmelCase_:       Any         =  self.head
         lowerCAmelCase_:       Any         =  new_node
         return self.head.data
  
  
  
  
      def     _a						(						self   ):
         lowerCAmelCase_:       int         =  self.head
         lowerCAmelCase_:       Optional[int]         =  self.head
         if self.head:
            while fast_pointer and fast_pointer.next:
               lowerCAmelCase_:       Tuple         =  fast_pointer.next.next
               lowerCAmelCase_:       int         =  slow_pointer.next
            return slow_pointer.data
         else:
            print("No element found."   )
            return None
  
  
  if __name__ == "__main__":
   a     :			Optional[Any]					    =						LinkedList()
   for _ in range(int(input().strip())):
    a     :			Tuple					    =						int(input().strip())
    link.push(data)
   print(link.middle_element())
  
  
  
  
style_context: import itertools
  def 		snake_case__  (		lowercase				):
     return (
         int("".join(combination[0:2]				)				) * int("".join(combination[2:5]				)				)
         == int("".join(combination[5:9]				)				)
     ) or (
         int("".join(combination[0]				)				) * int("".join(combination[1:5]				)				)
         == int("".join(combination[5:9]				)				)
     )
  def 		snake_case__  (		):
     return sum(
         {
             int("".join(pandigital[5:9]				)				)
             for pandigital in itertools.permutations("123456789"				)
             if is_combination_valid(lowercase				)
         }				)
  
  
  if __name__ == "__main__":
   print(solution())