def get_triplets_for_perimter(p):
    return [(a, b, p - a - b)
            for b in range(1, p // 2 + 1)
            for a in range(1, b)
            if a * a + b * b == (p - a - b) * (p - a - b)]


def euler_039():
    return max([(len(get_triplets_for_perimter(p)), p)
                for p in range(1, 1001)])[1]


if __name__ == "__main__":
    assert(euler_039() == 840)
    print("e039.py: " + str(euler_039()))