






lowerCamelCase       :       Dict        =				'''0.21.0'''

from .accelerator import Accelerator
from .big_modeling import (
    cpu_offload,
    cpu_offload_with_hook,
    disk_offload,
    dispatch_model,
    init_empty_weights,
    init_on_device,
    load_checkpoint_and_dispatch,
)
from .data_loader import skip_first_batches
from .launchers import debug_launcher, notebook_launcher
from .state import PartialState
from .utils import (
    DeepSpeedPlugin,
    DistributedDataParallelKwargs,
    DistributedType,
    FullyShardedDataParallelPlugin,
    GradScalerKwargs,
    InitProcessGroupKwargs,
    find_executable_batch_size,
    infer_auto_device_map,
    is_rich_available,
    load_checkpoint_in_model,
    synchronize_rng_states,
)


if is_rich_available():
	from .utils import rich







def 					snake_case_						(   lowerCAmelCase_				:  list					):

							if len(lowerCAmelCase_					) <= 1:
														return [tuple(lowerCAmelCase_					)]

							__lowercase					:							Any			=   []

							def generate(lowerCAmelCase_				:  int				,				lowerCAmelCase_				:  list					):
														if k == 1:
																					res.append(tuple(arr[:]					)					)
																					return

														generate(k - 1				,				lowerCAmelCase_					)

														for i in range(k - 1					):
																					if k % 2 == 0:  # k is even
																												__lowercase	,	__lowercase					:							List[str]			=   arr[k - 1], arr[i]
																					else:  # k is odd
																												__lowercase	,	__lowercase					:							Any			=   arr[k - 1], arr[0]
																					generate(k - 1				,				lowerCAmelCase_					)

							generate(len(lowerCAmelCase_					)				,				lowerCAmelCase_					)
							return res


if __name__ == "__main__":
	lowerCamelCase       :       Union[str, Any]        =				input('''Enter numbers separated by a comma:\n''').strip()
	lowerCamelCase       :       Optional[Any]        =				[int(item) for item in user_input.split(''',''')]
	print(heaps(arr))