Mbpp/72

def dif_Square(n: int) -> bool:
    """
    Check whether the given integer n can be represented as the difference of two squares.

    A number n can be expressed as a^2 - b^2 for integers a, b iff n is not congruent to 2 modulo 4.
    This includes negative numbers because if n = a^2 - b^2, then -n = b^2 - a^2.
    Zero is trivially representable (0^2 - 0^2).
    """
    # Take absolute value because sign does not affect representability
    # (if n is representable, -n

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