def fahrenheit_to_celsius(fahrenheit: int) -> int:
    """
    Convert fahrenheit to celsius.
    Note: We are not using float for the input our output, because at this time, our users
    prefer not to have that level of precision.
    :param fahrenheit:int
    :return:int
    """

    # Formula: Subtract 32 and multiply by .5556 (or 5/9).
    return int((fahrenheit - 32) * .5556)