





'''simple docstring'''






def      __A						(							a_						:  int	):
		lowerCAmelCase     :    List[Any]						=   0
		while len(__snake_case	) > 1:
				lowerCAmelCase     :    Optional[int]						=   0
				# Consider two files with minimum cost to be merged
				for _ in range(2	):
						lowerCAmelCase     :    str						=   files.index(min(__snake_case	)	)
						temp += files[min_index]
						files.pop(__snake_case	)
				files.append(__snake_case	)
				optimal_merge_cost += temp
		return optimal_merge_cost


if __name__ == "__main__":
					import doctest

					doctest.testmod()










'''simple docstring'''






from collections import namedtuple

lowerCAmelCase       		=      namedtuple("""from_to""", """from_ to""")

lowerCAmelCase       		=      {
    """cubicmeter""": from_to(1, 1),
    """litre""": from_to(0.001, 10_00),
    """kilolitre""": from_to(1, 1),
    """gallon""": from_to(0.00454, 264.172),
    """cubicyard""": from_to(0.76455, 1.30795),
    """cubicfoot""": from_to(0.028, 35.3147),
    """cup""": from_to(0.000236588, 4226.75),
}






def      __A						(							a_						:  float      ,a_						:  str      ,a_						:  str	):
		if from_type not in METRIC_CONVERSION:
				raise ValueError(
				    f'''Invalid \'from_type\' value: {from_type!r}  Supported values are:\n'''
				    + ", ".join(a_	)	)
		if to_type not in METRIC_CONVERSION:
				raise ValueError(
				    f'''Invalid \'to_type\' value: {to_type!r}.  Supported values are:\n'''
				    + ", ".join(a_	)	)
		return value * METRIC_CONVERSION[from_type].from_ * METRIC_CONVERSION[to_type].to


if __name__ == "__main__":
					import doctest

					doctest.testmod()



