



import os
import string
import sys


snake_case__					:     str    		=   1 << 8

snake_case__					:     List[Any]    		=   {
    """tab""": ord("""\t"""),
    """newline""": ord("""\r"""),
    """esc""": 27,
    """up""": 65 + ARROW_KEY_FLAG,
    """down""": 66 + ARROW_KEY_FLAG,
    """right""": 67 + ARROW_KEY_FLAG,
    """left""": 68 + ARROW_KEY_FLAG,
    """mod_int""": 91,
    """undefined""": sys.maxsize,
    """interrupt""": 3,
    """insert""": 50,
    """delete""": 51,
    """pg_up""": 53,
    """pg_down""": 54,
}

snake_case__					:     List[Any]    		=   KEYMAP["""up"""]
snake_case__					:     str    		=   KEYMAP["""left"""]

if sys.platform == "win32":
 snake_case__					:     Union[str, Any]    		=   []
 snake_case__					:     Any    		=   {
     b"""\xe0H""": KEYMAP["""up"""] - ARROW_KEY_FLAG,
     b"""\x00H""": KEYMAP["""up"""] - ARROW_KEY_FLAG,
     b"""\xe0P""": KEYMAP["""down"""] - ARROW_KEY_FLAG,
     b"""\x00P""": KEYMAP["""down"""] - ARROW_KEY_FLAG,
     b"""\xe0M""": KEYMAP["""right"""] - ARROW_KEY_FLAG,
     b"""\x00M""": KEYMAP["""right"""] - ARROW_KEY_FLAG,
     b"""\xe0K""": KEYMAP["""left"""] - ARROW_KEY_FLAG,
     b"""\x00K""": KEYMAP["""left"""] - ARROW_KEY_FLAG,
 }

for i in range(10):
 snake_case__					:     Union[str, Any]    		=   ord(str(i))



def    snake_case_				(    ):
 if os.name == "nt":
  import msvcrt

  __lowercase		       =			"mbcs"
  # Flush the keyboard buffer
  while msvcrt.kbhit():
   msvcrt.getch()
  if len(_lowerCAmelCase   ) == 0:
   # Read the keystroke
   __lowercase		       =			msvcrt.getch()

   # If it is a prefix char, get second part
   if ch in (b"\x00", b"\xe0"):
    __lowercase		       =			ch + msvcrt.getch()
    # Translate actual Win chars to bullet char types
    try:
     __lowercase		       =			chr(WIN_KEYMAP[cha]   )
     WIN_CH_BUFFER.append(chr(KEYMAP["mod_int"]   )   )
     WIN_CH_BUFFER.append(_lowerCAmelCase   )
     if ord(_lowerCAmelCase   ) in (
         KEYMAP["insert"] - 1 << 9,
         KEYMAP["delete"] - 1 << 9,
         KEYMAP["pg_up"] - 1 << 9,
         KEYMAP["pg_down"] - 1 << 9,
     ):
      WIN_CH_BUFFER.append(chr(1_2_6   )   )
     __lowercase		       =			chr(KEYMAP["esc"]   )
    except KeyError:
     __lowercase		       =			cha[1]
   else:
    __lowercase		       =			ch.decode(_lowerCAmelCase   )
  else:
   __lowercase		       =			WIN_CH_BUFFER.pop(0   )
 elif os.name == "posix":
  import termios
  import tty

  __lowercase		       =			sys.stdin.fileno()
  __lowercase		       =			termios.tcgetattr(_lowerCAmelCase   )
  try:
   tty.setraw(_lowerCAmelCase   )
   __lowercase		       =			sys.stdin.read(1   )
  finally:
   termios.tcsetattr(_lowerCAmelCase  ,	termios.TCSADRAIN  ,	_lowerCAmelCase   )
 return ch



def    snake_case_				(    ):
 __lowercase		       =			get_raw_chars()
 if ord(_lowerCAmelCase   ) in [KEYMAP["interrupt"], KEYMAP["newline"]]:
  return char

 elif ord(_lowerCAmelCase   ) == KEYMAP["esc"]:
  __lowercase		       =			get_raw_chars()
  if ord(_lowerCAmelCase   ) == KEYMAP["mod_int"]:
   __lowercase		       =			get_raw_chars()
   if ord(_lowerCAmelCase   ) >= KEYMAP["arrow_begin"] - ARROW_KEY_FLAG and ord(_lowerCAmelCase   ) <= KEYMAP["arrow_end"] - ARROW_KEY_FLAG:
    return chr(ord(_lowerCAmelCase   ) + ARROW_KEY_FLAG   )
   else:
    return KEYMAP["undefined"]
  else:
   return get_raw_chars()

 else:
  if char in string.printable:
   return char
  else:
   return KEYMAP["undefined"]








def    snake_case_				(    _SCREAMING_SNAKE_CASE   ):

	# bit count represents no. of bits in the gray code
	if bit_count < 0:
		raise ValueError("The given input must be positive"   )

	# get the generated string sequence
	__lowercase		       =			gray_code_sequence_string(_SCREAMING_SNAKE_CASE   )
	#
	# convert them to integers
	for i in range(len(_SCREAMING_SNAKE_CASE   )   ):
		__lowercase		       =			int(sequence[i]  ,	2   )

	return sequence



def    snake_case_				(    _SCREAMING_SNAKE_CASE   ):

	# The approach is a recursive one
	# Base case achieved when either n = 0 or n=1
	if bit_count == 0:
		return ["0"]

	if bit_count == 1:
		return ["0", "1"]

	__lowercase		       =			1 << bit_count  # defines the length of the sequence
	# 1<< n is equivalent to 2^n

	# recursive answer will generate answer for n-1 bits
	__lowercase		       =			gray_code_sequence_string(bit_count - 1   )

	__lowercase		       =			[]

	# append 0 to first half of the smaller sequence generated
	for i in range(seq_len // 2   ):
		__lowercase		       =			"0" + smaller_sequence[i]
		sequence.append(_SCREAMING_SNAKE_CASE   )

	# append 1 to second half ... start from the end of the list
	for i in reversed(range(seq_len // 2   )   ):
		__lowercase		       =			"1" + smaller_sequence[i]
		sequence.append(_SCREAMING_SNAKE_CASE   )

	return sequence


if __name__ == "__main__":
	import doctest

	doctest.testmod()



