





import json
from typing import Iterator, List, Union

from tokenizers import AddedToken, Regex, Tokenizer, decoders, normalizers, pre_tokenizers, trainers
from tokenizers.implementations.base_tokenizer import BaseTokenizer
from tokenizers.models import Unigram
from tokenizers.processors import TemplateProcessing
class 		lowerCamelCase  (      _A       ):



	def __init__(   self		,      a_ = "▁"		,      a_ = True		,      a_ = "<unk>"		,      a_ = "</s>"		,      a_ = "<pad>"		,      ):
			lowerCAmelCase     :    Tuple						=   {
			    "pad": {"id": 0, "token": pad_token},
			    "eos": {"id": 1, "token": eos_token},
			    "unk": {"id": 2, "token": unk_token},
			}

			lowerCAmelCase     :    Optional[Any]						=   [None] * len(self.special_tokens	)
			for token_dict in self.special_tokens.values():
					lowerCAmelCase     :    Optional[int]						=   token_dict["token"]

			lowerCAmelCase     :    Optional[int]						=   Tokenizer(Unigram()	)

			lowerCAmelCase     :    Union[str, Any]						=   normalizers.Sequence(
			    [
			        normalizers.Nmt(),
			        normalizers.NFKC(),
			        normalizers.Replace(Regex(" {2,}"	)		,      " "	),
			        normalizers.Lowercase(),
			    ]	)
			lowerCAmelCase     :    str						=   pre_tokenizers.Sequence(
			    [
			        pre_tokenizers.Metaspace(replacement=__UpperCamelCase		,      add_prefix_space=__UpperCamelCase	),
			        pre_tokenizers.Digits(individual_digits=__UpperCamelCase	),
			        pre_tokenizers.Punctuation(),
			    ]	)
			lowerCAmelCase     :    Optional[int]						=   decoders.Metaspace(replacement=__UpperCamelCase		,      add_prefix_space=__UpperCamelCase	)

			lowerCAmelCase     :    Optional[Any]						=   TemplateProcessing(
			    single=F'''$A {self.special_tokens["eos"]["token"]}'''		,      special_tokens=[(self.special_tokens["eos"]["token"], self.special_tokens["eos"]["id"])]		,      )

			lowerCAmelCase     :    Dict						=   {
			    "model": "SentencePieceUnigram",
			    "replacement": replacement,
			    "add_prefix_space": add_prefix_space,
			}

			super().__init__(__UpperCamelCase		,      __UpperCamelCase	)



	def   _lowerCamelCase    (   self		,      a_		,      a_ = 8_000		,      a_ = True		,      ):
			lowerCAmelCase     :    List[str]						=   trainers.UnigramTrainer(
			    vocab_size=__UpperCamelCase		,      special_tokens=self.special_tokens_list		,      show_progress=__UpperCamelCase		,      )

			if isinstance(__UpperCamelCase		,      __UpperCamelCase	):
					lowerCAmelCase     :    List[str]						=   [files]
			self._tokenizer.train(__UpperCamelCase		,      trainer=__UpperCamelCase	)

			self.add_unk_id()



	def   _lowerCamelCase    (   self		,      a_		,      a_ = 8_000		,      a_ = True		,      ):
			lowerCAmelCase     :    Tuple						=   trainers.UnigramTrainer(
			    vocab_size=__UpperCamelCase		,      special_tokens=self.special_tokens_list		,      show_progress=__UpperCamelCase		,      )

			self._tokenizer.train_from_iterator(__UpperCamelCase		,      trainer=__UpperCamelCase	)

			self.add_unk_id()





	def   _lowerCamelCase    (   self	):
			lowerCAmelCase     :    int						=   json.loads(self._tokenizer.to_str()	)

			lowerCAmelCase     :    Optional[Any]						=   self.special_tokens["unk"]["id"]

			lowerCAmelCase     :    Optional[Any]						=   Tokenizer.from_str(json.dumps(__UpperCamelCase	)	)










'''simple docstring'''






from __future__ import annotations

lowerCAmelCase       		=      []






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






def      __A						(							a_						:  list[list[int]]      ,a_						:  int	):
		if row >= len(a_	):
				solution.append(a_	)
				printboard(a_	)
				print()
				return True
		for i in range(len(a_	)	):
				if is_safe(a_      ,a_      ,a_	):
						lowerCAmelCase     :    Any						=   1
						solve(a_      ,row + 1	)
						lowerCAmelCase     :    List[Any]						=   0
		return False






def      __A						(							a_						:  list[list[int]]	):
		for i in range(len(a_	)	):
				for j in range(len(a_	)	):
						if board[i][j] == 1:
								print("Q"      ,end=" "	)
						else:
								print("."      ,end=" "	)
				print()


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

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



