



from __future__ import annotations

from collections.abc import Iterator
from typing import Generic, TypeVar

__A      		=     TypeVar('''T''')



class   lowercase_   (  Generic[T]					):



      def __init__(      self				:    Any      , A__				:    T		)   ->					str:
        _snake_case						=							data
        _snake_case						=							None







      def __str__(      self				:    Optional[int]		)   ->					str:
        return f"""{self.data}"""



class   lowercase_   (  Generic[T]					):



      def __init__(      self				:    Optional[Any]		)   ->					None:
        _snake_case						=							None



      def __iter__(      self				:    Optional[int]		)   ->					Iterator[T]:
        _snake_case						=							self.top
        while node:
          yield node.data
          _snake_case						=							node.next



      def __str__(      self				:    Optional[Any]		)   ->					str:
        return "->".join([str(A__		) for item in self]		)



      def __len__(      self				:    List[Any]		)   ->					int:
        return len(tuple(iter(self		)		)		)



      def 						UpperCamelCase_		(      self				:    int		)   ->					bool:
        return self.top is None



      def 						UpperCamelCase_		(      self				:    List[Any]      , A__				:    T		)   ->					None:
        _snake_case						=							Node(A__		)
        if not self.is_empty():
          _snake_case						=							self.top
        _snake_case						=							node



      def 						UpperCamelCase_		(      self				:    List[str]		)   ->					T:




        if self.is_empty():
          raise IndexError('''pop from empty stack'''		)
        assert isinstance(self.top      , A__		)
        _snake_case						=							self.top
        _snake_case						=							self.top.next
        return pop_node.data



      def 						UpperCamelCase_		(      self				:    Tuple		)   ->					T:




        if self.is_empty():
          raise IndexError('''peek from empty stack'''		)

        assert self.top is not None
        return self.top.data







      def 						UpperCamelCase_		(      self				:    str		)   ->					None:
        _snake_case						=							None


if __name__ == "__main__":
 from doctest import testmod

 testmod()




import os
import sys
from contextlib import contextmanager


# Windows only
if os.name == "nt":
 import ctypes
 import msvcrt  # noqa



 class   lowercase_   (  ctypes.Structure					):
       # _fields is a specific attr expected by ctypes
       UpperCamelCase_      :		List[Any]										=    [("size", ctypes.c_int), ("visible", ctypes.c_byte)]



def 				snake_case_()							->     int:



  """simple docstring"""






  if os.name == "nt":
    _snake_case						=							CursorInfo()
    _snake_case						=							ctypes.windll.kernelaa.GetStdHandle(-11					)
    ctypes.windll.kernelaa.GetConsoleCursorInfo(_UpperCamelCase			,	ctypes.byref(_UpperCamelCase					)					)
    _snake_case						=							False
    ctypes.windll.kernelaa.SetConsoleCursorInfo(_UpperCamelCase			,	ctypes.byref(_UpperCamelCase					)					)
  elif os.name == "posix":
    sys.stdout.write('''\033[?25l'''					)
    sys.stdout.flush()



def 				snake_case_()							->     Optional[Any]:



  """simple docstring"""






  if os.name == "nt":
    _snake_case						=							CursorInfo()
    _snake_case						=							ctypes.windll.kernelaa.GetStdHandle(-11					)
    ctypes.windll.kernelaa.GetConsoleCursorInfo(_UpperCamelCase			,	ctypes.byref(_UpperCamelCase					)					)
    _snake_case						=							True
    ctypes.windll.kernelaa.SetConsoleCursorInfo(_UpperCamelCase			,	ctypes.byref(_UpperCamelCase					)					)
  elif os.name == "posix":
    sys.stdout.write('''\033[?25h'''					)
    sys.stdout.flush()



@contextmanager
def 				snake_case_()							->     int:



  """simple docstring"""






  try:
    hide_cursor()
    yield
  finally:
    show_cursor()

