





import os
from argparse import ArgumentParser
from typing import List

import torch.utils.data

from datasets import Dataset, IterableDataset
from datasets.distributed import split_dataset_by_node


_lowercase		:  Any			       =4
_lowercase		:  Optional[Any]			       =3






class 						UpperCamelCase_  (  snake_case__							):
					pass


def 		_SCREAMING_SNAKE_CASE     ( lowerCAmelCase__						):
		for shard in shards:
				for i in range(lowerCAmelCase__						):
						yield {"i": i, "shard": shard}


def 		_SCREAMING_SNAKE_CASE     ( ):
		lowerCamelCase_	:     Union[str, Any] 						=      int(os.environ['RANK']						)
		lowerCamelCase_	:     str 						=      int(os.environ['WORLD_SIZE']						)

		lowerCamelCase_	:     List[Any] 						=      ArgumentParser()
		parser.add_argument('--streaming'							,type=lowerCAmelCase__						)
		parser.add_argument('--local_rank'							,type=lowerCAmelCase__						)
		parser.add_argument('--num_workers'							,type=lowerCAmelCase__							,default=0						)
		lowerCamelCase_	:     List[str] 						=      parser.parse_args()
		lowerCamelCase_	:     int 						=      args.streaming
		lowerCamelCase_	:     int 						=      args.num_workers

		lowerCamelCase_	:     int 						=      {'shards': [F"shard_{shard_idx}" for shard_idx in range(lowerCAmelCase__						)]}
		lowerCamelCase_	:     Any 						=      IterableDataset.from_generator(lowerCAmelCase__							,gen_kwargs=lowerCAmelCase__						)
		if not streaming:
				lowerCamelCase_	:     Union[str, Any] 						=      Dataset.from_list(list(lowerCAmelCase__						)						)

		lowerCamelCase_	:     Union[str, Any] 						=      split_dataset_by_node(lowerCAmelCase__							,rank=lowerCAmelCase__							,world_size=lowerCAmelCase__						)
		lowerCamelCase_	:     Tuple 						=      torch.utils.data.DataLoader(lowerCAmelCase__							,num_workers=lowerCAmelCase__						)

		lowerCamelCase_	:     Union[str, Any] 						=      NUM_SHARDS * NUM_ITEMS_PER_SHARD
		lowerCamelCase_	:     List[str] 						=      full_size // world_size
		expected_local_size += int(rank < (full_size % world_size)						)

		lowerCamelCase_	:     Union[str, Any] 						=      sum(1 for _ in dataloader						)
		if local_size != expected_local_size:
				raise FailedTestError(F"local_size {local_size} != expected_local_size {expected_local_size}"						)


if __name__ == "__main__":
		main()







_lowercase		:  Any			       =[0, 2, 4, 6, 8]
_lowercase		:  List[Any]			       =[1, 3, 5, 7, 9]


def 		_SCREAMING_SNAKE_CASE     ( lowerCAmelCase__							,lowerCAmelCase__							,lowerCAmelCase__							,lowerCAmelCase__						):
		if remaining_length == 0:
				if digits[0] == 0 or digits[-1] == 0:
						return 0

				for i in range(length // 2 - 1							,-1							,-1						):
						remainder += digits[i] + digits[length - i - 1]

						if remainder % 2 == 0:
								return 0

						remainder //= 10

				return 1

		if remaining_length == 1:
				if remainder % 2 == 0:
						return 0

				lowerCamelCase_	:     Dict 						=      0
				for digit in range(10						):
						lowerCamelCase_	:     List[Any] 						=      digit
						result += reversible_numbers(
						    0							,(remainder + 2 * digit) // 10							,lowerCAmelCase__							,lowerCAmelCase__						)
				return result

		lowerCamelCase_	:     List[str] 						=      0
		for digita in range(10						):
				lowerCamelCase_	:     Tuple 						=      digita

				if (remainder + digita) % 2 == 0:
						lowerCamelCase_	:     Dict 						=      ODD_DIGITS
				else:
						lowerCamelCase_	:     str 						=      EVEN_DIGITS

				for digita in other_parity_digits:
						lowerCamelCase_	:     Optional[int] 						=      digita
						result += reversible_numbers(
						    remaining_length - 2							,(remainder + digita + digita) // 10							,lowerCAmelCase__							,lowerCAmelCase__							,)
		return result


def 		_SCREAMING_SNAKE_CASE     ( lowerCAmelCase__ = 9						):
		lowerCamelCase_	:     int 						=      0
		for length in range(1							,max_power + 1						):
				result += reversible_numbers(lowerCAmelCase__							,0							,[0] * length							,lowerCAmelCase__						)
		return result


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