struct EqualVector : std::binary_function<std::vector<int>, std::vector<int>, bool>
{
    bool operator() (const std::vector<int>& vector, const std::vector<int>& vector2) const
    {
        return std::equal(vector.begin(), vector.end(), vector2.begin(), std::equal_to<int>());
    }
};

bool Magic_square::equals(const Magic_square& otherNumber) const
{
    return std::equal(this->numbers.begin(),this->numbers.end()
                                                    , otherNumber.numbers.begin(), EqualVector());
}