






from __future__ import annotations

__UpperCAmelCase     							=						list[tuple[int, int]]

__UpperCAmelCase     							=						[
    [0, 0, 0, 0, 0, 0, 0],
    [0, 1, 0, 0, 0, 0, 0],  # 0 are free path whereas 1's are obstacles
    [0, 0, 0, 0, 0, 0, 0],
    [0, 0, 1, 0, 0, 0, 0],
    [1, 0, 1, 0, 0, 0, 0],
    [0, 0, 0, 0, 0, 0, 0],
    [0, 0, 0, 0, 1, 0, 0],
]

__UpperCAmelCase     							=						([-1, 0], [0, -1], [1, 0], [0, 1])  # up, left, down, right



class   lowerCamelCase				:



		def __init__(							self    ,		_UpperCamelCase    ,		_UpperCamelCase    ,		_UpperCamelCase    ,		_UpperCamelCase    ,		_UpperCamelCase    ,		_UpperCamelCase    ,		)     ->							Dict:
							UpperCAmelCase_   :				int						=						pos_x
							UpperCAmelCase_   :				Union[str, Any]						=						pos_y
							UpperCAmelCase_   :				Any						=						(pos_y, pos_x)
							UpperCAmelCase_   :				List[str]						=						goal_x
							UpperCAmelCase_   :				Union[str, Any]						=						goal_y
							UpperCAmelCase_   :				Optional[int]						=						g_cost
							UpperCAmelCase_   :				Union[str, Any]						=						parent
							UpperCAmelCase_   :				Any						=						self.calculate_heuristic()



		def  __UpperCAmelCase      (							self       )     ->							float:
							UpperCAmelCase_   :				Union[str, Any]						=						abs(self.pos_x - self.goal_x       )
							UpperCAmelCase_   :				Dict						=						abs(self.pos_y - self.goal_y       )
							return dx + dy



		def __lt__(							self    ,		_UpperCamelCase       )     ->							bool:
							return self.f_cost < other.f_cost





class   lowerCamelCase				:



		def __init__(							self    ,		_UpperCamelCase    ,		_UpperCamelCase       )     ->							int:
							UpperCAmelCase_   :				Union[str, Any]						=						Node(start[1]    ,		start[0]    ,		goal[1]    ,		goal[0]    ,		0    ,		_UpperCamelCase       )
							UpperCAmelCase_   :				str						=						Node(goal[1]    ,		goal[0]    ,		goal[1]    ,		goal[0]    ,		9_9_9_9_9    ,		_UpperCamelCase       )

							UpperCAmelCase_   :				Tuple						=						[self.start]
							UpperCAmelCase_   :				list[Node]						=						[]

							UpperCAmelCase_   :				Optional[int]						=						False



		def  __UpperCAmelCase      (							self       )     ->							Path | None:
							while self.open_nodes:
												# Open Nodes are sorted using __lt__
												self.open_nodes.sort()
												UpperCAmelCase_   :				Union[str, Any]						=						self.open_nodes.pop(0       )

												if current_node.pos == self.target.pos:
																	UpperCAmelCase_   :				Dict						=						True
																	return self.retrace_path(_UpperCamelCase       )

												self.closed_nodes.append(_UpperCamelCase       )
												UpperCAmelCase_   :				List[Any]						=						self.get_successors(_UpperCamelCase       )

												for child_node in successors:
																	if child_node in self.closed_nodes:
																						continue

																	if child_node not in self.open_nodes:
																						self.open_nodes.append(_UpperCamelCase       )
																	else:
																						# retrieve the best current path
																						UpperCAmelCase_   :				Optional[int]						=						self.open_nodes.pop(self.open_nodes.index(_UpperCamelCase       )       )

																						if child_node.g_cost < better_node.g_cost:
																											self.open_nodes.append(_UpperCamelCase       )
																						else:
																											self.open_nodes.append(_UpperCamelCase       )

							if not self.reached:
												return [self.start.pos]
							return None



		def  __UpperCAmelCase      (							self    ,		_UpperCamelCase       )     ->							list[Node]:
							UpperCAmelCase_   :				Dict						=						[]
							for action in delta:
												UpperCAmelCase_   :				Optional[int]						=						parent.pos_x + action[1]
												UpperCAmelCase_   :				List[Any]						=						parent.pos_y + action[0]

												if not (0 <= pos_x <= len(grid[0]       ) - 1 and 0 <= pos_y <= len(_UpperCamelCase       ) - 1):
																	continue

												if grid[pos_y][pos_x] != 0:
																	continue

												successors.append(
												    Node(
												        _UpperCamelCase    ,		_UpperCamelCase    ,		self.target.pos_y    ,		self.target.pos_x    ,		parent.g_cost + 1    ,		_UpperCamelCase    ,		)       )
							return successors



		def  __UpperCAmelCase      (							self    ,		_UpperCamelCase       )     ->							Path:
							UpperCAmelCase_   :				Any						=						node
							UpperCAmelCase_   :				Dict						=						[]
							while current_node is not None:
												path.append((current_node.pos_y, current_node.pos_x)       )
												UpperCAmelCase_   :				Optional[int]						=						current_node.parent
							path.reverse()
							return path


if __name__ == "__main__":
		__UpperCAmelCase     							=						(0, 0)
		__UpperCAmelCase     							=						(len(grid) - 1, len(grid[0]) - 1)
		for elem in grid:
				print(elem)

		print('------')

		__UpperCAmelCase     							=						GreedyBestFirst(init, goal)
		__UpperCAmelCase     							=						greedy_bf.search()
		if path:
				for pos_x, pos_y in path:
						__UpperCAmelCase     							=						2

				for elem in grid:
						print(elem)














def 					lowercase__				(					__snake_case   :							List[str]					,	__snake_case   :							List[str]					,	__snake_case   :							Union[str, Any]					,	__snake_case   :							Optional[int]					,	__snake_case   :							str					,	__snake_case   :							Optional[Any]  ):


					'''simple docstring'''


					if index == r:
										for j in range(__snake_case  ):
															print(data[j]					,	end=' '  )
										print(' '  )
										return
					#  When no more elements are there to put in data[]
					if i >= n:
										return
					# current is included, put next at next location
					UpperCAmelCase_   :				int						=						arr[i]
					combination_util(__snake_case					,	__snake_case					,	__snake_case					,	index + 1					,	__snake_case					,	i + 1  )
					# current is excluded, replace it with
					# next (Note that i+1 is passed, but
					# index is not changed)
					combination_util(__snake_case					,	__snake_case					,	__snake_case					,	__snake_case					,	__snake_case					,	i + 1  )
					# The main function that prints all combinations
					# of size r in arr[] of size n. This function
					# mainly uses combinationUtil()




def 					lowercase__				(					__snake_case   :							List[Any]					,	__snake_case   :							List[Any]					,	__snake_case   :							str  ):


					'''simple docstring'''


					UpperCAmelCase_   :				Union[str, Any]						=						[0] * r
					# Print all combination using temporary array 'data[]'
					combination_util(__snake_case					,	__snake_case					,	__snake_case					,	0					,	__snake_case					,	0  )


if __name__ == "__main__":
		# Driver code to check the function above
		__UpperCAmelCase     							=						[10, 20, 30, 40, 50]
		print_combination(arr, len(arr), 3)
		# This code is contributed by Ambuj sahu






