from __future__ import annotations

SCREAMING_SNAKE_CASE__		:					List[Any]						=					[]







def     _a				(      lowercase__  :			list[list[int]]     ,  lowercase__  :			int     ,  lowercase__  :			int ):







     '''simple docstring'''


     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__  :			list[list[int]]     ,  lowercase__  :			int ):







     '''simple docstring'''


     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__				:				Dict			=		1
               solve(lowercase__     ,  row + 1 )
               SCREAMING_SNAKE_CASE__				:				List[Any]			=		0
     return False







def     _a				(      lowercase__  :			list[list[int]] ):







     '''simple docstring'''


     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"))
SCREAMING_SNAKE_CASE__		:					Dict						=					8
SCREAMING_SNAKE_CASE__		:					Optional[int]						=					[[0 for i in range(n)] for j in range(n)]
solve(board, 0)







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




class       snake_case					(      UpperCamelCase_						):
  pass




class       snake_case					(      UpperCamelCase_						):
  pass




class       snake_case					:




  def __init__(      self     :	Union[str, Any]				)->       Tuple:




       """simple docstring"""
       SCREAMING_SNAKE_CASE__				:				int			=		[
           [],
           [],
           [],
       ]




  def 	__lowercase(      self     :	int     , a_     :	int     , a_     :	int				)->       None:




       """simple docstring"""
       try:
            if len(self.queues[priority]				) >= 100:
                 raise OverflowError('Maximum queue size is 100'				)
            self.queues[priority].append(a_				)
       except IndexError:
            raise ValueError('Valid priorities are 0, 1, and 2'				)




  def 	__lowercase(      self     :	int				)->       int:




       """simple docstring"""
       for queue in self.queues:
            if queue:
                 return queue.pop(0				)
       raise UnderFlowError('All queues are empty'				)




  def __str__(      self     :	Any				)->       str:




       """simple docstring"""
       return "\n".join(F'''Priority {i}: {q}''' for i, q in enumerate(self.queues				)				)




class       snake_case					:




  def __init__(      self     :	Union[str, Any]				)->       Dict:




       """simple docstring"""
       SCREAMING_SNAKE_CASE__				:				List[Any]			=		[]




  def 	__lowercase(      self     :	List[str]     , a_     :	int				)->       None:




       """simple docstring"""
       if len(self.queue				) == 100:
            raise OverFlowError('Maximum queue size is 100'				)
       self.queue.append(a_				)




  def 	__lowercase(      self     :	int				)->       int:




       """simple docstring"""
       if not self.queue:
            raise UnderFlowError('The queue is empty'				)
       else:
            SCREAMING_SNAKE_CASE__				:				Optional[int]			=		min(self.queue				)
            self.queue.remove(a_				)
            return data




  def __str__(      self     :	List[str]				)->       str:




       """simple docstring"""
       return str(self.queue				)







def     _a				(      ):







     '''simple docstring'''


     SCREAMING_SNAKE_CASE__				:				int			=		FixedPriorityQueue()
     fpq.enqueue(0     ,  10 )
     fpq.enqueue(1     ,  70 )
     fpq.enqueue(0     ,  1_00 )
     fpq.enqueue(2     ,  1 )
     fpq.enqueue(2     ,  5 )
     fpq.enqueue(1     ,  7 )
     fpq.enqueue(2     ,  4 )
     fpq.enqueue(1     ,  64 )
     fpq.enqueue(0     ,  1_28 )
     print(lowercase__ )
     print(fpq.dequeue() )
     print(fpq.dequeue() )
     print(fpq.dequeue() )
     print(fpq.dequeue() )
     print(fpq.dequeue() )
     print(lowercase__ )
     print(fpq.dequeue() )
     print(fpq.dequeue() )
     print(fpq.dequeue() )
     print(fpq.dequeue() )
     print(fpq.dequeue() )







def     _a				(      ):







     '''simple docstring'''


     SCREAMING_SNAKE_CASE__				:				Dict			=		ElementPriorityQueue()
     epq.enqueue(10 )
     epq.enqueue(70 )
     epq.enqueue(1_00 )
     epq.enqueue(1 )
     epq.enqueue(5 )
     epq.enqueue(7 )
     epq.enqueue(4 )
     epq.enqueue(64 )
     epq.enqueue(1_28 )
     print(lowercase__ )
     print(epq.dequeue() )
     print(epq.dequeue() )
     print(epq.dequeue() )
     print(epq.dequeue() )
     print(epq.dequeue() )
     print(lowercase__ )
     print(epq.dequeue() )
     print(epq.dequeue() )
     print(epq.dequeue() )
     print(epq.dequeue() )
     print(epq.dequeue() )


if __name__ == "__main__":
      fixed_priority_queue()
      element_priority_queue()



