






def 					lowercase_ (    __snake_case     :							int      )     -> float:





				'''simple docstring'''


				snake_case__      :str         =   0
				while len(__snake_case      ) > 1:
								snake_case__      :Optional[Any]         =   0
								# Consider two files with minimum cost to be merged
								for _ in range(2      ):
												snake_case__      :List[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()







from typing import TYPE_CHECKING

from ...utils import OptionalDependencyNotAvailable, _LazyModule, is_sentencepiece_available


__UpperCAmelCase							:   Tuple							=  {}

try:
	if not is_sentencepiece_available():
		raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
	pass
else:
	__UpperCAmelCase							:   List[Any]							=  ["BartphoTokenizer"]

if TYPE_CHECKING:
	try:
		if not is_sentencepiece_available():
			raise OptionalDependencyNotAvailable()
	except OptionalDependencyNotAvailable:
		pass
	else:
		from .tokenization_bartpho import BartphoTokenizer

else:
	import sys

	__UpperCAmelCase							:   Tuple							=  _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)