#ifndef PAIR_H
#define PAIR_H

#include <iostream>
using namespace std;

template <typename T, typename U>
class Pair
{
    private:
        T key;
        U value;
    public:
        Pair(T k, U v = U()) :
            key(k), value(v) {}
        
        T getKey()    const {return key;}
        U getValue()  const {return value;}        
        void setValue(U );   
       
};

template <typename T, typename U>
void Pair<T,U>::setValue(U v) {
    value = v;
}
template <typename T, typename U>
ostream& operator<< (ostream& out, const Pair<T,U> & p) {
    out << "(" << p.getKey() << ", " << p.getValue() << ")" ;
    return out;
}
    

#endif