from __future__ import annotations

__UpperCamelCase		:       Dict									=     []
def       A	(    _lowercase		,  _lowercase		,  _lowercase						):
						for i in range(len(_lowercase						)						):
												if board[row][i] == 1:
																		return False
						for i in range(len(_lowercase						)						):
												if board[i][column] == 1:
																		return False
						for i, j in zip(range(_lowercase		,  -1		,  -1						)		,  range(_lowercase		,  -1		,  -1						)						):
												if board[i][j] == 1:
																		return False
						for i, j in zip(range(_lowercase		,  -1		,  -1						)		,  range(_lowercase		,  len(_lowercase						)						)						):
												if board[i][j] == 1:
																		return False
						return True
def       A	(    _lowercase		,  _lowercase						):
						if row >= len(_lowercase						):
												solution.append(_lowercase						)
												printboard(_lowercase						)
												print()
												return True
						for i in range(len(_lowercase						)						):
												if is_safe(_lowercase		,  _lowercase		,  _lowercase						):
																		SCREAMING_SNAKE_CASE							:    List[Any]							=							1
																		solve(_lowercase		,  row + 1						)
																		SCREAMING_SNAKE_CASE							:    List[str]							=							0
						return False
def       A	(    _lowercase						):
						for i in range(len(_lowercase						)						):
												for j in range(len(_lowercase						)						):
																		if board[i][j] == 1:
																								print('''Q'''		,  end=''' '''						)
																		else:
																								print('''.'''		,  end=''' '''						)
												print()


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



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






from math import ceil
def       A	(    _lowercase = 1_001						):
						SCREAMING_SNAKE_CASE							:    Any							=							1

						for i in range(1		,  int(ceil(n / 2.0						)						)						):
												SCREAMING_SNAKE_CASE							:    Union[str, Any]							=							2 * i + 1
												SCREAMING_SNAKE_CASE							:    int							=							2 * i
												SCREAMING_SNAKE_CASE							:    List[str]							=							total + 4 * odd**2 - 6 * even

						return total


if __name__ == "__main__":
					import sys

					if len(sys.argv) == 1:
										print(solution())
					else:
										try:
															__UpperCamelCase		:       Dict									=     int(sys.argv[1])
															print(solution(n))
										except ValueError:
															print('Invalid entry - please enter a number')





