






"""simple docstring"""



from __future__ import annotations

from collections.abc import Iterable, Iterator
from dataclasses import dataclass

A_    =							(3, 9, -11, 0, 7, 5, 1, -1)
A_    =							(4, 6, 2, 0, 8, 10, 3, -2)






@dataclass
class 							__SCREAMING_SNAKE_CASE						:
							snake_case_     =							42
							snake_case_     =							42






class 							__SCREAMING_SNAKE_CASE						:


							def __init__(			self      :						List[str]			,    snake_case      :						Iterable[int]							):
													'''simple docstring'''





													A__						:  Node | None		  =  None
													for i in sorted(snake_case			,    reverse=snake_case							):
																			A__						:  Optional[int]		  =  Node(snake_case			,    self.head							)


							def __iter__(			self      :						int							):
													'''simple docstring'''





													A__						:  Dict		  =  self.head
													while node:
																			yield node.data
																			A__						:  Any		  =  node.next_node


							def __len__(			self      :						Dict							):
													'''simple docstring'''





													return sum(1 for _ in self							)


							def __str__(			self      :						Optional[Any]							):
													'''simple docstring'''





													return " -> ".join([str(snake_case							) for node in self]							)




def      _lowerCAmelCase		(							UpperCAmelCase__       :					SortedLinkedList,						UpperCAmelCase__       :					SortedLinkedList      )		->SortedLinkedList:
						return SortedLinkedList(list(UpperCAmelCase__      ) + list(UpperCAmelCase__      )      )


if __name__ == "__main__":
						import doctest

						doctest.testmod()
						A_    =							SortedLinkedList
						print(merge_lists(SSL(test_data_odd), SSL(test_data_even)))














"""simple docstring"""



from __future__ import annotations

A_    =							[]




def      _lowerCAmelCase		(							UpperCAmelCase__       :					list[list[int]],						UpperCAmelCase__       :					int,						UpperCAmelCase__       :					int      )		->bool:
						for i in range(len(UpperCAmelCase__      )      ):
												if board[row][i] == 1:
																		return False
						for i in range(len(UpperCAmelCase__      )      ):
												if board[i][column] == 1:
																		return False
						for i, j in zip(range(UpperCAmelCase__,						-1,						-1      ),						range(UpperCAmelCase__,						-1,						-1      )      ):
												if board[i][j] == 1:
																		return False
						for i, j in zip(range(UpperCAmelCase__,						-1,						-1      ),						range(UpperCAmelCase__,						len(UpperCAmelCase__      )      )      ):
												if board[i][j] == 1:
																		return False
						return True




def      _lowerCAmelCase		(							UpperCAmelCase__       :					list[list[int]],						UpperCAmelCase__       :					int      )		->bool:
						if row >= len(UpperCAmelCase__      ):
												solution.append(UpperCAmelCase__      )
												printboard(UpperCAmelCase__      )
												print()
												return True
						for i in range(len(UpperCAmelCase__      )      ):
												if is_safe(UpperCAmelCase__,						UpperCAmelCase__,						UpperCAmelCase__      ):
																		A__						:  Tuple		  =  1
																		solve(UpperCAmelCase__,						row + 1      )
																		A__						:  Optional[int]		  =  0
						return False




def      _lowerCAmelCase		(							UpperCAmelCase__       :					list[list[int]]      )		->None:
						for i in range(len(UpperCAmelCase__      )      ):
												for j in range(len(UpperCAmelCase__      )      ):
																		if board[i][j] == 1:
																								print("""Q""",						end=""" """      )
																		else:
																								print(""".""",						end=""" """      )
												print()


# n=int(input("The no. of queens"))
A_    =							8
A_    =							[[0 for i in range(n)] for j in range(n)]
solve(board, 0)

print('''The total no. of solutions are :''', len(solution))






