


import unittest

import numpy as np

from transformers.testing_utils import require_pytesseract, require_torch
from transformers.utils import is_pytesseract_available, is_torch_available

from ...test_image_processing_common import ImageProcessingSavingTestMixin, prepare_image_inputs


if is_torch_available():
		import torch

if is_pytesseract_available():
		from PIL import Image

		from transformers import LayoutLMvaImageProcessor





class  _a							(    unittest.TestCase):




	def __init__( self						:		List[str]		, _SCREAMING_SNAKE_CASE						:		int		, _SCREAMING_SNAKE_CASE						:		int=7		, _SCREAMING_SNAKE_CASE						:		Tuple=3		, _SCREAMING_SNAKE_CASE						:		int=18		, _SCREAMING_SNAKE_CASE						:		Tuple=30		, _SCREAMING_SNAKE_CASE						:		Optional[Any]=400		, _SCREAMING_SNAKE_CASE						:		Dict=True		, _SCREAMING_SNAKE_CASE						:		Optional[int]=None		, _SCREAMING_SNAKE_CASE						:		Dict=True		, )->	str:
			lowerCAmelCase__       :      str   					= size if size is not None else {'''height''': 18, '''width''': 18}
			lowerCAmelCase__       :      Optional[Any]   					= parent
			lowerCAmelCase__       :      List[str]   					= batch_size
			lowerCAmelCase__       :      Any   					= num_channels
			lowerCAmelCase__       :      str   					= image_size
			lowerCAmelCase__       :      List[str]   					= min_resolution
			lowerCAmelCase__       :      Union[str, Any]   					= max_resolution
			lowerCAmelCase__       :      str   					= do_resize
			lowerCAmelCase__       :      int   					= size
			lowerCAmelCase__       :      int   					= apply_ocr




	def 							UpperCAmelCase__( self						:		str		)->	int:
			return {"do_resize": self.do_resize, "size": self.size, "apply_ocr": self.apply_ocr}





@require_torch
@require_pytesseract
class  _a							(    _lowercase					,						unittest.TestCase):
	_a  :  Optional[int]				   =							LayoutLMvaImageProcessor if is_pytesseract_available() else None




	def 							UpperCAmelCase__( self						:		List[str]		)->	Union[str, Any]:
			lowerCAmelCase__       :      Dict   					= LayoutLMvaImageProcessingTester(self		)




	@property
	def 							UpperCAmelCase__( self						:		Any		)->	Dict:
			return self.image_processor_tester.prepare_image_processor_dict()




	def 							UpperCAmelCase__( self						:		Any		)->	int:
			lowerCAmelCase__       :      Dict   					= self.image_processing_class(**self.image_processor_dict		)
			self.assertTrue(hasattr(_SCREAMING_SNAKE_CASE		, '''do_resize'''		)		)
			self.assertTrue(hasattr(_SCREAMING_SNAKE_CASE		, '''size'''		)		)
			self.assertTrue(hasattr(_SCREAMING_SNAKE_CASE		, '''apply_ocr'''		)		)




	def 							UpperCAmelCase__( self						:		Optional[Any]		)->	str:
			lowerCAmelCase__       :      List[str]   					= self.image_processing_class.from_dict(self.image_processor_dict		)
			self.assertEqual(image_processor.size		, {'''height''': 18, '''width''': 18}		)

			lowerCAmelCase__       :      Any   					= self.image_processing_class.from_dict(self.image_processor_dict		, size=42		)
			self.assertEqual(image_processor.size		, {'''height''': 42, '''width''': 42}		)




	def 							UpperCAmelCase__( self						:		str		)->	Any:
			pass




	def 							UpperCAmelCase__( self						:		Dict		)->	List[str]:
			# Initialize image_processing
			lowerCAmelCase__       :      Union[str, Any]   					= self.image_processing_class(**self.image_processor_dict		)
			# create random PIL images
			lowerCAmelCase__       :      Optional[Any]   					= prepare_image_inputs(self.image_processor_tester		, equal_resolution=_SCREAMING_SNAKE_CASE		)
			for image in image_inputs:
					self.assertIsInstance(_SCREAMING_SNAKE_CASE		, Image.Image		)

			# Test not batched input
			lowerCAmelCase__       :      Union[str, Any]   					= image_processing(image_inputs[0]		, return_tensors='''pt'''		)
			self.assertEqual(
			    encoding.pixel_values.shape		, (
			        1,
			        self.image_processor_tester.num_channels,
			        self.image_processor_tester.size['''height'''],
			        self.image_processor_tester.size['''width'''],
			    )		, )

			self.assertIsInstance(encoding.words		, _SCREAMING_SNAKE_CASE		)
			self.assertIsInstance(encoding.boxes		, _SCREAMING_SNAKE_CASE		)

			# Test batched
			lowerCAmelCase__       :      Any   					= image_processing(_SCREAMING_SNAKE_CASE		, return_tensors='''pt'''		).pixel_values
			self.assertEqual(
			    encoded_images.shape		, (
			        self.image_processor_tester.batch_size,
			        self.image_processor_tester.num_channels,
			        self.image_processor_tester.size['''height'''],
			        self.image_processor_tester.size['''width'''],
			    )		, )




	def 							UpperCAmelCase__( self						:		Union[str, Any]		)->	Tuple:
			# Initialize image_processing
			lowerCAmelCase__       :      Optional[int]   					= self.image_processing_class(**self.image_processor_dict		)
			# create random numpy tensors
			lowerCAmelCase__       :      Any   					= prepare_image_inputs(self.image_processor_tester		, equal_resolution=_SCREAMING_SNAKE_CASE		, numpify=_SCREAMING_SNAKE_CASE		)
			for image in image_inputs:
					self.assertIsInstance(_SCREAMING_SNAKE_CASE		, np.ndarray		)

			# Test not batched input
			lowerCAmelCase__       :      str   					= image_processing(image_inputs[0]		, return_tensors='''pt'''		).pixel_values
			self.assertEqual(
			    encoded_images.shape		, (
			        1,
			        self.image_processor_tester.num_channels,
			        self.image_processor_tester.size['''height'''],
			        self.image_processor_tester.size['''width'''],
			    )		, )

			# Test batched
			lowerCAmelCase__       :      List[Any]   					= image_processing(_SCREAMING_SNAKE_CASE		, return_tensors='''pt'''		).pixel_values
			self.assertEqual(
			    encoded_images.shape		, (
			        self.image_processor_tester.batch_size,
			        self.image_processor_tester.num_channels,
			        self.image_processor_tester.size['''height'''],
			        self.image_processor_tester.size['''width'''],
			    )		, )




	def 							UpperCAmelCase__( self						:		Optional[int]		)->	str:
			# Initialize image_processing
			lowerCAmelCase__       :      Any   					= self.image_processing_class(**self.image_processor_dict		)
			# create random PyTorch tensors
			lowerCAmelCase__       :      Any   					= prepare_image_inputs(self.image_processor_tester		, equal_resolution=_SCREAMING_SNAKE_CASE		, torchify=_SCREAMING_SNAKE_CASE		)
			for image in image_inputs:
					self.assertIsInstance(_SCREAMING_SNAKE_CASE		, torch.Tensor		)

			# Test not batched input
			lowerCAmelCase__       :      Dict   					= image_processing(image_inputs[0]		, return_tensors='''pt'''		).pixel_values
			self.assertEqual(
			    encoded_images.shape		, (
			        1,
			        self.image_processor_tester.num_channels,
			        self.image_processor_tester.size['''height'''],
			        self.image_processor_tester.size['''width'''],
			    )		, )

			# Test batched
			lowerCAmelCase__       :      Optional[Any]   					= image_processing(_SCREAMING_SNAKE_CASE		, return_tensors='''pt'''		).pixel_values
			self.assertEqual(
			    encoded_images.shape		, (
			        self.image_processor_tester.batch_size,
			        self.image_processor_tester.num_channels,
			        self.image_processor_tester.size['''height'''],
			        self.image_processor_tester.size['''width'''],
			    )		, )




	def 							UpperCAmelCase__( self						:		Optional[int]		)->	Tuple:
			# with apply_OCR = True
			lowerCAmelCase__       :      Dict   					= LayoutLMvaImageProcessor()

			from datasets import load_dataset

			lowerCAmelCase__       :      str   					= load_dataset('''hf-internal-testing/fixtures_docvqa'''		, split='''test'''		)

			lowerCAmelCase__       :      Union[str, Any]   					= Image.open(ds[0]['''file''']		).convert('''RGB'''		)

			lowerCAmelCase__       :      Union[str, Any]   					= image_processing(_SCREAMING_SNAKE_CASE		, return_tensors='''pt'''		)

			self.assertEqual(encoding.pixel_values.shape		, (1, 3, 224, 224)		)
			self.assertEqual(len(encoding.words		)		, len(encoding.boxes		)		)

			# fmt: off
			# the words and boxes were obtained with Tesseract 4.1.1
			lowerCAmelCase__       :      Optional[int]   					= [['''11:14''', '''to''', '''11:39''', '''a.m''', '''11:39''', '''to''', '''11:44''', '''a.m.''', '''11:44''', '''a.m.''', '''to''', '''12:25''', '''p.m.''', '''12:25''', '''to''', '''12:58''', '''p.m.''', '''12:58''', '''to''', '''4:00''', '''p.m.''', '''2:00''', '''to''', '''5:00''', '''p.m.''', '''Coffee''', '''Break''', '''Coffee''', '''will''', '''be''', '''served''', '''for''', '''men''', '''and''', '''women''', '''in''', '''the''', '''lobby''', '''adjacent''', '''to''', '''exhibit''', '''area.''', '''Please''', '''move''', '''into''', '''exhibit''', '''area.''', '''(Exhibits''', '''Open)''', '''TRRF''', '''GENERAL''', '''SESSION''', '''(PART''', '''|)''', '''Presiding:''', '''Lee''', '''A.''', '''Waller''', '''TRRF''', '''Vice''', '''President''', '''“Introductory''', '''Remarks”''', '''Lee''', '''A.''', '''Waller,''', '''TRRF''', '''Vice''', '''Presi-''', '''dent''', '''Individual''', '''Interviews''', '''with''', '''TRRF''', '''Public''', '''Board''', '''Members''', '''and''', '''Sci-''', '''entific''', '''Advisory''', '''Council''', '''Mem-''', '''bers''', '''Conducted''', '''by''', '''TRRF''', '''Treasurer''', '''Philip''', '''G.''', '''Kuehn''', '''to''', '''get''', '''answers''', '''which''', '''the''', '''public''', '''refrigerated''', '''warehousing''', '''industry''', '''is''', '''looking''', '''for.''', '''Plus''', '''questions''', '''from''', '''the''', '''floor.''', '''Dr.''', '''Emil''', '''M.''', '''Mrak,''', '''University''', '''of''', '''Cal-''', '''ifornia,''', '''Chairman,''', '''TRRF''', '''Board;''', '''Sam''', '''R.''', '''Cecil,''', '''University''', '''of''', '''Georgia''', '''College''', '''of''', '''Agriculture;''', '''Dr.''', '''Stanley''', '''Charm,''', '''Tufts''', '''University''', '''School''', '''of''', '''Medicine;''', '''Dr.''', '''Robert''', '''H.''', '''Cotton,''', '''ITT''', '''Continental''', '''Baking''', '''Company;''', '''Dr.''', '''Owen''', '''Fennema,''', '''University''', '''of''', '''Wis-''', '''consin;''', '''Dr.''', '''Robert''', '''E.''', '''Hardenburg,''', '''USDA.''', '''Questions''', '''and''', '''Answers''', '''Exhibits''', '''Open''', '''Capt.''', '''Jack''', '''Stoney''', '''Room''', '''TRRF''', '''Scientific''', '''Advisory''', '''Council''', '''Meeting''', '''Ballroom''', '''Foyer''']]  # noqa: E231
			lowerCAmelCase__       :      Dict   					= [[[141, 57, 214, 69], [228, 58, 252, 69], [141, 75, 216, 88], [230, 79, 280, 88], [142, 260, 218, 273], [230, 261, 255, 273], [143, 279, 218, 290], [231, 282, 290, 291], [143, 342, 218, 354], [231, 345, 289, 355], [202, 362, 227, 373], [143, 379, 220, 392], [231, 382, 291, 394], [144, 714, 220, 726], [231, 715, 256, 726], [144, 732, 220, 745], [232, 736, 291, 747], [144, 769, 218, 782], [231, 770, 256, 782], [141, 788, 202, 801], [215, 791, 274, 804], [143, 826, 204, 838], [215, 826, 240, 838], [142, 844, 202, 857], [215, 847, 274, 859], [334, 57, 427, 69], [440, 57, 522, 69], [369, 75, 461, 88], [469, 75, 516, 88], [528, 76, 562, 88], [570, 76, 667, 88], [675, 75, 711, 87], [721, 79, 778, 88], [789, 75, 840, 88], [369, 97, 470, 107], [484, 94, 507, 106], [518, 94, 562, 107], [576, 94, 655, 110], [668, 94, 792, 109], [804, 95, 829, 107], [369, 113, 465, 125], [477, 116, 547, 125], [562, 113, 658, 125], [671, 116, 748, 125], [761, 113, 811, 125], [369, 131, 465, 143], [477, 133, 548, 143], [563, 130, 698, 145], [710, 130, 802, 146], [336, 171, 412, 183], [423, 171, 572, 183], [582, 170, 716, 184], [728, 171, 817, 187], [829, 171, 844, 186], [338, 197, 482, 212], [507, 196, 557, 209], [569, 196, 595, 208], [610, 196, 702, 209], [505, 214, 583, 226], [595, 214, 656, 227], [670, 215, 807, 227], [335, 259, 543, 274], [556, 259, 708, 272], [372, 279, 422, 291], [435, 279, 460, 291], [474, 279, 574, 292], [587, 278, 664, 291], [676, 278, 738, 291], [751, 279, 834, 291], [372, 298, 434, 310], [335, 341, 483, 354], [497, 341, 655, 354], [667, 341, 728, 354], [740, 341, 825, 354], [335, 360, 430, 372], [442, 360, 534, 372], [545, 359, 687, 372], [697, 360, 754, 372], [765, 360, 823, 373], [334, 378, 428, 391], [440, 378, 577, 394], [590, 378, 705, 391], [720, 378, 801, 391], [334, 397, 400, 409], [370, 416, 529, 429], [544, 416, 576, 432], [587, 416, 665, 428], [677, 416, 814, 429], [372, 435, 452, 450], [465, 434, 495, 447], [511, 434, 600, 447], [611, 436, 637, 447], [649, 436, 694, 451], [705, 438, 824, 447], [369, 453, 452, 466], [464, 454, 509, 466], [522, 453, 611, 469], [625, 453, 792, 469], [370, 472, 556, 488], [570, 472, 684, 487], [697, 472, 718, 485], [732, 472, 835, 488], [369, 490, 411, 503], [425, 490, 484, 503], [496, 490, 635, 506], [645, 490, 707, 503], [718, 491, 761, 503], [771, 490, 840, 503], [336, 510, 374, 521], [388, 510, 447, 522], [460, 510, 489, 521], [503, 510, 580, 522], [592, 509, 736, 525], [745, 509, 770, 522], [781, 509, 840, 522], [338, 528, 434, 541], [448, 528, 596, 541], [609, 527, 687, 540], [700, 528, 792, 541], [336, 546, 397, 559], [407, 546, 431, 559], [443, 546, 525, 560], [537, 546, 680, 562], [688, 546, 714, 559], [722, 546, 837, 562], [336, 565, 449, 581], [461, 565, 485, 577], [497, 565, 665, 581], [681, 565, 718, 577], [732, 565, 837, 580], [337, 584, 438, 597], [452, 583, 521, 596], [535, 584, 677, 599], [690, 583, 787, 596], [801, 583, 825, 596], [338, 602, 478, 615], [492, 602, 530, 614], [543, 602, 638, 615], [650, 602, 676, 614], [688, 602, 788, 615], [802, 602, 843, 614], [337, 621, 502, 633], [516, 621, 615, 637], [629, 621, 774, 636], [789, 621, 827, 633], [337, 639, 418, 652], [432, 640, 571, 653], [587, 639, 731, 655], [743, 639, 769, 652], [780, 639, 841, 652], [338, 658, 440, 673], [455, 658, 491, 670], [508, 658, 602, 671], [616, 658, 638, 670], [654, 658, 835, 674], [337, 677, 429, 689], [337, 714, 482, 726], [495, 714, 548, 726], [561, 714, 683, 726], [338, 770, 461, 782], [474, 769, 554, 785], [489, 788, 562, 803], [576, 788, 643, 801], [656, 787, 751, 804], [764, 788, 844, 801], [334, 825, 421, 838], [430, 824, 574, 838], [584, 824, 723, 841], [335, 844, 450, 857], [464, 843, 583, 860], [628, 862, 755, 875], [769, 861, 848, 878]]]  # noqa: E231
			# fmt: on

			self.assertListEqual(encoding.words		, _SCREAMING_SNAKE_CASE		)
			self.assertListEqual(encoding.boxes		, _SCREAMING_SNAKE_CASE		)

			# with apply_OCR = False
			lowerCAmelCase__       :      List[str]   					= LayoutLMvaImageProcessor(apply_ocr=_SCREAMING_SNAKE_CASE		)

			lowerCAmelCase__       :      Optional[int]   					= image_processing(_SCREAMING_SNAKE_CASE		, return_tensors='''pt'''		)

			self.assertEqual(encoding.pixel_values.shape		, (1, 3, 224, 224)		)








class  _a							:




	def __init__( self						:		str		, _SCREAMING_SNAKE_CASE						:		str		, _SCREAMING_SNAKE_CASE						:		Optional[int]		, _SCREAMING_SNAKE_CASE						:		List[Any]		)->	Tuple:
			lowerCAmelCase__       :      List[Any]   					= None
			lowerCAmelCase__       :      int   					= None
			lowerCAmelCase__       :      Union[str, Any]   					= graph

			self._normalize_graph(_SCREAMING_SNAKE_CASE		, _SCREAMING_SNAKE_CASE		)
			lowerCAmelCase__       :      Tuple   					= len(_SCREAMING_SNAKE_CASE		)
			lowerCAmelCase__       :      Optional[int]   					= None




	def 							UpperCAmelCase__( self						:		Union[str, Any]		, _SCREAMING_SNAKE_CASE						:		Optional[Any]		, _SCREAMING_SNAKE_CASE						:		Union[str, Any]		)->	Union[str, Any]:
			if sources is int:
					lowerCAmelCase__       :      List[Any]   					= [sources]
			if sinks is int:
					lowerCAmelCase__       :      Optional[Any]   					= [sinks]

			if len(_SCREAMING_SNAKE_CASE		) == 0 or len(_SCREAMING_SNAKE_CASE		) == 0:
					return

			lowerCAmelCase__       :      Union[str, Any]   					= sources[0]
			lowerCAmelCase__       :      Dict   					= sinks[0]

			# make fake vertex if there are more
			# than one source or sink
			if len(_SCREAMING_SNAKE_CASE		) > 1 or len(_SCREAMING_SNAKE_CASE		) > 1:
					lowerCAmelCase__       :      List[Any]   					= 0
					for i in sources:
							max_input_flow += sum(self.graph[i]		)

					lowerCAmelCase__       :      Any   					= len(self.graph		) + 1
					for room in self.graph:
							room.insert(0		, 0		)
					self.graph.insert(0		, [0] * size		)
					for i in sources:
							lowerCAmelCase__       :      Optional[Any]   					= max_input_flow
					lowerCAmelCase__       :      List[str]   					= 0

					lowerCAmelCase__       :      List[Any]   					= len(self.graph		) + 1
					for room in self.graph:
							room.append(0		)
					self.graph.append([0] * size		)
					for i in sinks:
							lowerCAmelCase__       :      str   					= max_input_flow
					lowerCAmelCase__       :      Tuple   					= size - 1




	def 							UpperCAmelCase__( self						:		Union[str, Any]		)->	Union[str, Any]:
			if self.maximum_flow_algorithm is None:
					raise Exception('''You need to set maximum flow algorithm before.'''		)
			if self.source_index is None or self.sink_index is None:
					return 0

			self.maximum_flow_algorithm.execute()
			return self.maximum_flow_algorithm.getMaximumFlow()




	def 							UpperCAmelCase__( self						:		str		, _SCREAMING_SNAKE_CASE						:		List[Any]		)->	int:
			lowerCAmelCase__       :      int   					= algorithm(self		)





class  _a							:




	def __init__( self						:		Optional[Any]		, _SCREAMING_SNAKE_CASE						:		Tuple		)->	Union[str, Any]:
			lowerCAmelCase__       :      Tuple   					= flow_network
			lowerCAmelCase__       :      Dict   					= flow_network.verticesCount
			lowerCAmelCase__       :      Optional[Any]   					= flow_network.sourceIndex
			lowerCAmelCase__       :      Optional[Any]   					= flow_network.sinkIndex
			# it's just a reference, so you shouldn't change
			# it in your algorithms, use deep copy before doing that
			lowerCAmelCase__       :      str   					= flow_network.graph
			lowerCAmelCase__       :      Optional[int]   					= False




	def 							UpperCAmelCase__( self						:		List[str]		)->	Dict:
			if not self.executed:
					self._algorithm()
					lowerCAmelCase__       :      Any   					= True




	def 							UpperCAmelCase__( self						:		Optional[Any]		)->	int:
			pass





class  _a							(    _lowercase):




	def __init__( self						:		Any		, _SCREAMING_SNAKE_CASE						:		List[Any]		)->	Union[str, Any]:
			super().__init__(_SCREAMING_SNAKE_CASE		)
			# use this to save your result
			lowerCAmelCase__       :      Dict   					= -1




	def 							UpperCAmelCase__( self						:		Any		)->	Optional[Any]:
			if not self.executed:
					raise Exception('''You should execute algorithm before using its result!'''		)

			return self.maximum_flow





class  _a							(    _lowercase):




	def __init__( self						:		Any		, _SCREAMING_SNAKE_CASE						:		List[str]		)->	List[str]:
			super().__init__(_SCREAMING_SNAKE_CASE		)

			lowerCAmelCase__       :      Any   					= [[0] * self.verticies_count for i in range(self.verticies_count		)]

			lowerCAmelCase__       :      Optional[Any]   					= [0] * self.verticies_count
			lowerCAmelCase__       :      str   					= [0] * self.verticies_count




	def 							UpperCAmelCase__( self						:		Any		)->	List[Any]:
			lowerCAmelCase__       :      Optional[Any]   					= self.verticies_count

			# push some substance to graph
			for nextvertex_index, bandwidth in enumerate(self.graph[self.source_index]		):
					self.preflow[self.source_index][nextvertex_index] += bandwidth
					self.preflow[nextvertex_index][self.source_index] -= bandwidth
					self.excesses[nextvertex_index] += bandwidth

			# Relabel-to-front selection rule
			lowerCAmelCase__       :      Any   					= [
			    i
			    for i in range(self.verticies_count		)
			    if i != self.source_index and i != self.sink_index
			]

			# move through list
			lowerCAmelCase__       :      str   					= 0
			while i < len(_SCREAMING_SNAKE_CASE		):
					lowerCAmelCase__       :      Union[str, Any]   					= vertices_list[i]
					lowerCAmelCase__       :      Any   					= self.heights[vertex_index]
					self.process_vertex(_SCREAMING_SNAKE_CASE		)
					if self.heights[vertex_index] > previous_height:
							# if it was relabeled, swap elements
							# and start from 0 index
							vertices_list.insert(0		, vertices_list.pop(_SCREAMING_SNAKE_CASE		)		)
							lowerCAmelCase__       :      Optional[Any]   					= 0
					else:
							i += 1

			lowerCAmelCase__       :      Optional[Any]   					= sum(self.preflow[self.source_index]		)




	def 							UpperCAmelCase__( self						:		List[str]		, _SCREAMING_SNAKE_CASE						:		Optional[Any]		)->	Optional[int]:
			while self.excesses[vertex_index] > 0:
					for neighbour_index in range(self.verticies_count		):
							# if it's neighbour and current vertex is higher
							if (
							    self.graph[vertex_index][neighbour_index]
							    - self.preflow[vertex_index][neighbour_index]
							    > 0
							    and self.heights[vertex_index] > self.heights[neighbour_index]
							):
									self.push(_SCREAMING_SNAKE_CASE		, _SCREAMING_SNAKE_CASE		)

					self.relabel(_SCREAMING_SNAKE_CASE		)




	def 							UpperCAmelCase__( self						:		int		, _SCREAMING_SNAKE_CASE						:		Optional[Any]		, _SCREAMING_SNAKE_CASE						:		Union[str, Any]		)->	Union[str, Any]:
			lowerCAmelCase__       :      Union[str, Any]   					= min(
			    self.excesses[from_index]		, self.graph[from_index][to_index] - self.preflow[from_index][to_index]		, )
			self.preflow[from_index][to_index] += preflow_delta
			self.preflow[to_index][from_index] -= preflow_delta
			self.excesses[from_index] -= preflow_delta
			self.excesses[to_index] += preflow_delta




	def 							UpperCAmelCase__( self						:		Optional[int]		, _SCREAMING_SNAKE_CASE						:		Any		)->	Optional[int]:
			lowerCAmelCase__       :      Optional[int]   					= None
			for to_index in range(self.verticies_count		):
					if (
					    self.graph[vertex_index][to_index]
					    - self.preflow[vertex_index][to_index]
					    > 0
					) and (min_height is None or self.heights[to_index] < min_height):
							lowerCAmelCase__       :      List[Any]   					= self.heights[to_index]

			if min_height is not None:
					lowerCAmelCase__       :      Optional[Any]   					= min_height + 1


if __name__ == "__main__":
		lowerCamelCase						=		[0]
		lowerCamelCase						=		[3]
		# graph = [
		#     [0, 0, 4, 6, 0, 0],
		#     [0, 0, 5, 2, 0, 0],
		#     [0, 0, 0, 0, 4, 4],
		#     [0, 0, 0, 0, 6, 6],
		#     [0, 0, 0, 0, 0, 0],
		#     [0, 0, 0, 0, 0, 0],
		# ]
		lowerCamelCase						=		[[0, 7, 0, 0], [0, 0, 6, 0], [0, 0, 0, 8], [9, 0, 0, 0]]

		# prepare our network
		lowerCamelCase						=		FlowNetwork(graph, entrances, exits)
		# set algorithm
		flow_network.set_maximum_flow_algorithm(PushRelabelExecutor)
		# and calculate
		lowerCamelCase						=		flow_network.find_maximum_flow()

		print(f'''maximum flow is {maximum_flow}''')




