

"""simple docstring"""





__UpperCamelCase  :      Optional[int]							      =		'''ABCDEFGHIJKLMNOPQRSTUVWXYZ'''

def   __SCREAMING_SNAKE_CASE  (      ):
	lowerCAmelCase__	:						Union[str, Any]  				=	input('''Enter message: ''' )
	lowerCAmelCase__	:						Optional[int]  				=	input('''Enter key [alphanumeric]: ''' )
	lowerCAmelCase__	:						Optional[int]  				=	input('''Encrypt/Decrypt [e/d]: ''' )

	if mode.lower().startswith('''e''' ):
		lowerCAmelCase__	:						Union[str, Any]  				=	'''encrypt'''
		lowerCAmelCase__	:						Union[str, Any]  				=	encrypt_message(__UpperCamelCase						,     __UpperCamelCase )
	elif mode.lower().startswith('''d''' ):
		lowerCAmelCase__	:						Any  				=	'''decrypt'''
		lowerCAmelCase__	:						str  				=	decrypt_message(__UpperCamelCase						,     __UpperCamelCase )

	print(f'\n{mode.title()}ed message:' )
	print(__UpperCamelCase )

def   __SCREAMING_SNAKE_CASE  (      A_						,     A_ ):
	return translate_message(__UpperCamelCase						,     __UpperCamelCase						,     '''encrypt''' )

def   __SCREAMING_SNAKE_CASE  (      A_						,     A_ ):
	return translate_message(__UpperCamelCase						,     __UpperCamelCase						,     '''decrypt''' )

def   __SCREAMING_SNAKE_CASE  (      A_						,     A_						,     A_ ):
	lowerCAmelCase__	:						Tuple  				=	[]
	lowerCAmelCase__	:						Optional[int]  				=	0
	lowerCAmelCase__	:						List[str]  				=	key.upper()

	for symbol in message:
		lowerCAmelCase__	:						Tuple  				=	LETTERS.find(symbol.upper() )
		if num != -1:
			if mode == "encrypt":
				num += LETTERS.find(key[key_index] )
			elif mode == "decrypt":
				num -= LETTERS.find(key[key_index] )

			num %= len(__UpperCamelCase )

			if symbol.isupper():
				translated.append(LETTERS[num] )
			elif symbol.islower():
				translated.append(LETTERS[num].lower() )

			key_index += 1
			if key_index == len(__UpperCamelCase ):
				lowerCAmelCase__	:						int  				=	0
		else:
			translated.append(__UpperCamelCase )
	return "".join(__UpperCamelCase )


if __name__ == "__main__":
							main()












"""simple docstring"""


from __future__ import annotations

from typing import Any



def 					lowerCAmelCase				(    __UpperCamelCase ):




  """simple docstring"""







  if not postfix_notation:
    return 0

  __A									= {'''+''', '''-''', '''*''', '''/'''}
  __A									= []

  for token in postfix_notation:
    if token in operations:
      __A			,    __A									= stack.pop(), stack.pop()
      if token == "+":
        stack.append(a + b )
      elif token == "-":
        stack.append(a - b )
      elif token == "*":
        stack.append(a * b )
      else:
        if a * b < 0 and a % b != 0:
          stack.append(a // b + 1 )
        else:
          stack.append(a // b )
    else:
      stack.append(int(__UpperCamelCase ) )

  return stack.pop()


if __name__ == "__main__":
       import doctest

       doctest.testmod()




