#include <iostream>

template <class T, class U>
class MyPair
{
    private:
        T key;
        U value;

    public:
        MyPair(T key, U value)
        {
            this->key   = key;
            this->value = value;
        }

        T get_key() const { return this->key; }
        U get_value() const { return this->value; }

        friend std::ostream& operator<<(const std::ostream& os, const MyPair<int, const char*>& pair);
        friend std::ostream& operator<<(const std::ostream& os, const MyPair<bool, int>& pair);
};

std::ostream& operator<<(const std::ostream& os, const MyPair<int, const char*>& pair)
{
    return std::cout << "Key: " << pair.get_key() << "\n"
                    << "Value: " << pair.get_value();
}

std::ostream& operator<<(const std::ostream& os, const MyPair<bool, int>& pair)
{
    std::ios_base::fmtflags flags = std::cout.flags();
    std::cout.setf(std::ios_base::boolalpha);
    std::cout << "Key: " << pair.get_key() << "\n"
                    << "Value: " << pair.get_value();

    std::cout.setf(flags);
    return std::cout;
}

int main(int argc, char **argv)
{
    MyPair<int, const char*> pair(50, "Hello :)");
    MyPair<bool, int> pair2(true, 50);
    std::cout << pair << std::endl;
    std::cout << pair2 << std::endl;

    return 0;
}