
"""simple docstring"""







def   __UpperCamelCase   (					SCREAMING_SNAKE_CASE )  ->     Optional[Any]:







							"""simple docstring"""


							__snake_case     			=       [0] * len(SCREAMING_SNAKE_CASE )
							__snake_case     			=       []
							__snake_case     			=       [1] * len(SCREAMING_SNAKE_CASE )

							for values in graph.values():
														for i in values:
																					indegree[i] += 1

							for i in range(len(SCREAMING_SNAKE_CASE ) ):
														if indegree[i] == 0:
																					queue.append(SCREAMING_SNAKE_CASE )

							while queue:
														__snake_case     			=       queue.pop(0 )
														for x in graph[vertex]:
																					indegree[x] -= 1

																					if long_dist[vertex] + 1 > long_dist[x]:
																												__snake_case     			=       long_dist[vertex] + 1

																					if indegree[x] == 0:
																												queue.append(SCREAMING_SNAKE_CASE )

							print(max(SCREAMING_SNAKE_CASE ) )


# Adjacency list of Graph
_SCREAMING_SNAKE_CASE	       =      {0: [2, 3, 4], 1: [2, 7], 2: [5], 3: [5, 7], 4: [7], 5: [6], 6: [7], 7: []}



longest_distance(graph)


"""simple docstring"""







from __future__ import annotations

from dataclasses import dataclass







@dataclass
class 							__magic_name__     :
					_SCREAMING_SNAKE_CASE       :					float
					_SCREAMING_SNAKE_CASE       :					TreeNode | None     							=   None
					_SCREAMING_SNAKE_CASE       :					TreeNode | None     							=   None




def   __UpperCamelCase   (					SCREAMING_SNAKE_CASE )  ->     bool:







							"""simple docstring"""


							def is_valid_tree(SCREAMING_SNAKE_CASE ) -> bool:
														if node is None:
																					return True

														if not isinstance(SCREAMING_SNAKE_CASE							,    SCREAMING_SNAKE_CASE ):
																					return False

														try:
																					float(node.data )
														except (TypeError, ValueError):
																					return False

														return is_valid_tree(node.left ) and is_valid_tree(node.right )

							if not is_valid_tree(SCREAMING_SNAKE_CASE ):
														raise ValueError(
														    "Each node should be type of TreeNode and data should be float." )

							def is_binary_search_tree_recursive_check(
							    SCREAMING_SNAKE_CASE							,    SCREAMING_SNAKE_CASE							,    SCREAMING_SNAKE_CASE ) -> bool:

														if node is None:
																					return True

														return (
														    left_bound < node.data < right_bound
														    and is_binary_search_tree_recursive_check(node.left							,    SCREAMING_SNAKE_CASE							,    node.data )
														    and is_binary_search_tree_recursive_check(
														        node.right							,    node.data							,    SCREAMING_SNAKE_CASE )
														)

							return is_binary_search_tree_recursive_check(SCREAMING_SNAKE_CASE							,    -float("inf" )							,    float("inf" ) )


if __name__ == "__main__":
		import doctest

		doctest.testmod()
