
'''simple docstring'''






def 		A_							(						_lowerCAmelCase :     int = 50				):



      """simple docstring"""




      _lowerCamelCase					: Optional[int]		    = [[0] * 3 for _ in range(length + 1				)]

      for row_length in range(length + 1				):
            for tile_length in range(2					,						5				):
                  for tile_start in range(row_length - tile_length + 1				):
                        different_colour_ways_number[row_length][tile_length - 2] += (
                            different_colour_ways_number[row_length - tile_start - tile_length][
                                tile_length - 2
                            ]
                            + 1
                        )

      return sum(different_colour_ways_number[length]				)


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



def 						_lowerCAmelCase							(     _lowerCAmelCase = 100			)    ->						int:


						'''simple docstring'''






						__snake_case				=		n * (n + 1) * (2 * n + 1) / 6
						__snake_case				=		(n * (n + 1) / 2) ** 2
						return int(square_of_sum - sum_of_squares			)


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





