


_snake_case				=			{
    "+": lambda x, y: x + y,
    "-": lambda x, y: x - y,
    "*": lambda x, y: x * y,
    "/": lambda x, y: x / y,
}







def 	A (		A__			):
     return c.isdigit()







def 	A (		A__			):
     UpperCAmelCase    :					Optional[Any]			=      []

     # iterate over the string in reverse order
     for c in expression.split()[::-1]:
          # push operand to stack
          if is_operand(A__			):
               stack.append(int(A__			)			)

          else:
               # pop values from stack can calculate the result
               # push the result onto the stack again
               UpperCAmelCase    :					Optional[int]			=      stack.pop()
               UpperCAmelCase    :					Union[str, Any]			=      stack.pop()
               stack.append(calc[c](A__		,		A__			)			)

     return stack.pop()


# Driver code
if __name__ == "__main__":
      _snake_case				=			"+ 9 * 2 6"
      print(evaluate(test_expression))

      _snake_case				=			"/ * 10 2 + 4 1 "
      print(evaluate(test_expression))







def 	A (		A__			):
     UpperCAmelCase    :					Dict			=      9

     while num > 0:
          if num % 1_0 != digit:
               return False
          num //= 1_0_0
          digit -= 1

     return True







def 	A (		):
     UpperCAmelCase    :					Optional[Any]			=      1_3_8_9_0_2_6_6_3

     while not is_square_form(num * num			):
          if num % 1_0 == 3:
               num -= 6  # (3 - 6) % 10 = 7
          else:
               num -= 4  # (7 - 4) % 10 = 3

     return num * 1_0


if __name__ == "__main__":
      print(f'''{solution() = }''')



