［AtCoder］ABC-144｜A - 9x9

設問ページ

• 🔗ABC-144 A - 9x9

提出結果

def getIntMap():
    return map(int, input().split())


def main():
    a, b = getIntMap()

    print(a * b if a < 10 and b < 10 else -1)


if __name__ == "__main__":
    main()