namespace std {
    template <class T, class Compare>
    inline const T& min (const T& a, const T& b, Compare comp) {
        return comp(b,a) ? b : a;
    }

    template <class T, class Compare>
    inline const T& max (const T& a, const T& b, Compare comp) {
        return comp(a,b) ? b : a;
    }
}