


'''simple docstring'''






def 						_A					(lowerCAmelCase__	:int = 10_00		) ->	int:




     '''simple docstring'''



     _a         =				0
     _a         =				(n - 1) // 3
     total += ((terms) * (6 + (terms - 1) * 3)) // 2  # total of an A.P.
     _a         =				(n - 1) // 5
     total += ((terms) * (10 + (terms - 1) * 5)) // 2
     _a         =				(n - 1) // 15
     total -= ((terms) * (30 + (terms - 1) * 15)) // 2
     return total


if __name__ == "__main__":
 print(f'''{solution() = }''')









"""simple docstring"""





class   _lowercase			:


      def __init__(     self					:						Optional[Any]				, a					:						Union[str, Any]    ):





            """simple docstring"""







            __snake_case   :     Union[str, Any]	      =data
            __snake_case   :     Optional[Any]	      =None
            __snake_case   :     Any	      =None







      def __str__(     self					:						Any    ):





            """simple docstring"""







            return f'''{self.data}'''



class   _lowercase			:


      def __init__(     self					:						Optional[int]    ):





            """simple docstring"""







            __snake_case   :     Any	      =None
            __snake_case   :     int	      =None


      def __iter__(     self					:						int    ):





            """simple docstring"""







            __snake_case   :     List[str]	      =self.head
            while node:
                  yield node.data
                  __snake_case   :     str	      =node.next


      def __str__(     self					:						Optional[int]    ):





            """simple docstring"""







            return "->".join([str(a    ) for item in self]    )


      def __len__(     self					:						str    ):





            """simple docstring"""







            return sum(1 for _ in self    )


      def _UpperCamelCase    (     self					:						int				, a					:						List[Any]    ):





            """simple docstring"""







            self.insert_at_nth(0				, a    )


      def _UpperCamelCase    (     self					:						str				, a					:						Optional[int]    ):





            """simple docstring"""







            self.insert_at_nth(len(self    )				, a    )


      def _UpperCamelCase    (     self					:						Optional[Any]				, a					:						int				, a					:						Tuple    ):





            """simple docstring"""







            __snake_case   :     List[str]	      =len(self    )

            if not 0 <= index <= length:
                  raise IndexError('''list index out of range'''    )
            __snake_case   :     List[Any]	      =Node(a    )
            if self.head is None:
                  __snake_case   :     Dict	      =new_node
            elif index == 0:
                  __snake_case   :     Union[str, Any]	      =new_node
                  __snake_case   :     Any	      =self.head
                  __snake_case   :     List[Any]	      =new_node
            elif index == length:
                  __snake_case   :     int	      =new_node
                  __snake_case   :     Optional[Any]	      =self.tail
                  __snake_case   :     Optional[Any]	      =new_node
            else:
                  __snake_case   :     Any	      =self.head
                  for _ in range(0				, a    ):
                        __snake_case   :     Optional[Any]	      =temp.next
                  __snake_case   :     Optional[Any]	      =new_node
                  __snake_case   :     Union[str, Any]	      =temp.previous
                  __snake_case   :     List[Any]	      =temp
                  __snake_case   :     str	      =new_node


      def _UpperCamelCase    (     self					:						List[str]    ):





            """simple docstring"""







            return self.delete_at_nth(0    )


      def _UpperCamelCase    (     self					:						List[Any]    ):





            """simple docstring"""







            return self.delete_at_nth(len(self    ) - 1    )


      def _UpperCamelCase    (     self					:						Optional[int]				, a					:						int    ):





            """simple docstring"""







            __snake_case   :     Tuple	      =len(self    )

            if not 0 <= index <= length - 1:
                  raise IndexError('''list index out of range'''    )
            __snake_case   :     str	      =self.head  # default first node
            if length == 1:
                  __snake_case   :     List[Any]	      =None
            elif index == 0:
                  __snake_case   :     List[Any]	      =self.head.next
                  __snake_case   :     Optional[int]	      =None
            elif index == length - 1:
                  __snake_case   :     str	      =self.tail
                  __snake_case   :     Union[str, Any]	      =self.tail.previous
                  __snake_case   :     Optional[Any]	      =None
            else:
                  __snake_case   :     Optional[int]	      =self.head
                  for _ in range(0				, a    ):
                        __snake_case   :     List[Any]	      =temp.next
                  __snake_case   :     Union[str, Any]	      =temp
                  __snake_case   :     Optional[int]	      =temp.previous
                  __snake_case   :     int	      =temp.next
            return delete_node.data


      def _UpperCamelCase    (     self					:						List[Any]				, a					:						Any    ):





            """simple docstring"""







            __snake_case   :     Optional[int]	      =self.head

            while current.data != data:  # Find the position to delete
                  if current.next:
                        __snake_case   :     Dict	      =current.next
                  else:  # We have reached the end an no value matches
                        raise ValueError('''No data matching given value'''    )

            if current == self.head:
                  self.delete_head()

            elif current == self.tail:
                  self.delete_tail()

            else:  # Before: 1 <--> 2(current) <--> 3
                  __snake_case   :     Tuple	      =current.next  # 1 --> 3
                  __snake_case   :     Optional[Any]	      =current.previous  # 1 <--> 3
            return data







      def _UpperCamelCase    (     self					:						int    ):





            """simple docstring"""







            return len(self    ) == 0



def      __lowercase       (     )       ->       None:
      __snake_case   :     List[str]	      =DoublyLinkedList()
      assert linked_list.is_empty() is True
      assert str(a			) == ""

      try:
            linked_list.delete_head()
            raise AssertionError  # This should not happen.
      except IndexError:
            assert True  # This should happen.

      try:
            linked_list.delete_tail()
            raise AssertionError  # This should not happen.
      except IndexError:
            assert True  # This should happen.

      for i in range(10			):
            assert len(a			) == i
            linked_list.insert_at_nth(a							,		i + 1			)
      assert str(a			) == "->".join(str(a			) for i in range(1							,		11			)			)

      linked_list.insert_at_head(0			)
      linked_list.insert_at_tail(11			)
      assert str(a			) == "->".join(str(a			) for i in range(0							,		12			)			)

      assert linked_list.delete_head() == 0
      assert linked_list.delete_at_nth(9			) == 10
      assert linked_list.delete_tail() == 11
      assert len(a			) == 9
      assert str(a			) == "->".join(str(a			) for i in range(1							,		10			)			)


if __name__ == "__main__":
    from doctest import testmod

    testmod()


