





'''simple docstring'''






from collections.abc import Iterator, MutableMapping
from dataclasses import dataclass
from typing import Generic, TypeVar

lowerCAmelCase       		=      TypeVar("""KEY""")
lowerCAmelCase       		=      TypeVar("""VAL""")
@dataclass(frozen=UpperCamelCase_      ,   slots=UpperCamelCase_       )
class 				lowerCamelCase  (      Generic[KEY, VAL]       ):
	snake_case_      =   42
	snake_case_      =   42






class 				lowerCamelCase  (      _Item       ):



	def __init__(   self	):
			super().__init__(__a		,      __a	)





	def __bool__(   self	):
			return False






lowerCAmelCase       		=      _DeletedItem()
class 				lowerCamelCase  (      MutableMapping[KEY, VAL]       ):



	def __init__(   self		,      a_ = 8		,      a_ = 0.75	):
			lowerCAmelCase     :    Any						=   initial_block_size
			lowerCAmelCase     :    list[_Item | None]						=   [None] * initial_block_size
			assert 0.0 < capacity_factor < 1.0
			lowerCAmelCase     :    List[str]						=   capacity_factor
			lowerCAmelCase     :    Dict						=   0



	def   _lowerCamelCase    (   self		,      a_	):
			return hash(__a	) % len(self._buckets	)



	def   _lowerCamelCase    (   self		,      a_	):
			return (ind + 1) % len(self._buckets	)



	def   _lowerCamelCase    (   self		,      a_		,      a_		,      a_	):
			lowerCAmelCase     :    List[str]						=   self._buckets[ind]
			if not stored:
					lowerCAmelCase     :    Optional[Any]						=   _Item(__a		,      __a	)
					self._len += 1
					return True
			elif stored.key == key:
					lowerCAmelCase     :    Dict						=   _Item(__a		,      __a	)
					return True
			else:
					return False



	def   _lowerCamelCase    (   self	):
			lowerCAmelCase     :    str						=   len(self._buckets	) * self._capacity_factor
			return len(self	) >= int(__a	)



	def   _lowerCamelCase    (   self	):






			if len(self._buckets	) <= self._initial_block_size:
					return False
			lowerCAmelCase     :    str						=   len(self._buckets	) * self._capacity_factor / 2
			return len(self	) < limit



	def   _lowerCamelCase    (   self		,      a_	):
			lowerCAmelCase     :    Optional[int]						=   self._buckets
			lowerCAmelCase     :    Dict						=   [None] * new_size
			lowerCAmelCase     :    Optional[Any]						=   0
			for item in old_buckets:
					if item:
							self._add_item(item.key		,      item.val	)



	def   _lowerCamelCase    (   self	):
			self._resize(len(self._buckets	) * 2	)



	def   _lowerCamelCase    (   self	):
			self._resize(len(self._buckets	) // 2	)



	def   _lowerCamelCase    (   self		,      a_	):
			lowerCAmelCase     :    List[Any]						=   self._get_bucket_index(__a	)
			for _ in range(len(self._buckets	)	):
					yield ind
					lowerCAmelCase     :    Union[str, Any]						=   self._get_next_ind(__a	)



	def   _lowerCamelCase    (   self		,      a_		,      a_	):






			for ind in self._iterate_buckets(__a	):
					if self._try_set(__a		,      __a		,      __a	):
							break



	def __setitem__(   self		,      a_		,      a_	):






			if self._is_full():
					self._size_up()

			self._add_item(__a		,      __a	)



	def __delitem__(   self		,      a_	):






			for ind in self._iterate_buckets(__a	):
					lowerCAmelCase     :    Optional[int]						=   self._buckets[ind]
					if item is None:
							raise KeyError(__a	)
					if item is _deleted:
							continue
					if item.key == key:
							lowerCAmelCase     :    int						=   _deleted
							self._len -= 1
							break
			if self._is_sparse():
					self._size_down()



	def __getitem__(   self		,      a_	):






			for ind in self._iterate_buckets(__a	):
					lowerCAmelCase     :    Union[str, Any]						=   self._buckets[ind]
					if item is None:
							break
					if item is _deleted:
							continue
					if item.key == key:
							return item.val
			raise KeyError(__a	)



	def __len__(   self	):
			return self._len



	def __iter__(   self	):
			yield from (item.key for item in self._buckets if item)





	def __repr__(   self	):
			lowerCAmelCase     :    str						=   ' ,'.join(
			    F'''{item.key}: {item.val}''' for item in self._buckets if item	)
			return F'''HashMap({val_string})'''










'''simple docstring'''






def      __A						(							a_						:  int	):
		assert (
		    isinstance(a_      ,a_	) and number_of_steps > 0
		), f'''number_of_steps needs to be positive integer, your input {number_of_steps}'''
		if number_of_steps == 1:
				return 1
		lowerCAmelCase	,		lowerCAmelCase     :    int						=   1, 1
		for _ in range(number_of_steps - 1	):
				lowerCAmelCase	,		lowerCAmelCase     :    Union[str, Any]						=   current + previous, current
		return current


if __name__ == "__main__":
					import doctest

					doctest.testmod()



