#include <sstream>
#include <vector>
#include <iostream>

struct Destination
{
    std::string name;
    int dist;
};

class Route_Planner
{
public:

    Route_Planner()
        : destinations{}
    {}

    int total_distance() const
    {
        int res {};
        for (Destination const& d : destinations)
        {
            res += 2 * d.dist;
        }
        return res;
    }

    void add(Destination const& rhs)
    {
        destinations.push_back(rhs);
    }

    Route_Planner& operator+=(Destination const& rhs)
    {
        add(rhs);
        return *this;
    }

    std::ostream& print(std::ostream& os) const
    {
        for (Destination const& d : destinations)
        {
            os << d.name << ": " << d.dist << std::endl;
        }
        return os;
    }

private:
    std::vector<Destination> destinations;
};

std::ostream& operator<<(std::ostream& os, Route_Planner const& rhs)
{
    return rhs.print(os);
}

int main()
{
    Route_Planner rp { };
    rp.add( Destination{"willys", 100} );
    rp.add( Destination{"coop", 3} );
    rp.add( Destination{"hemköp", 4} );
    rp.add( Destination{"lidl", 1} );
    rp.add( Destination{"ica", 7} );

    std::cout << "=== Alla butiker ===" << std::endl;
    std::cout << "# Total distans: " << rp.total_distance() << std::endl;
    std::cout << rp << std::endl;
            
    return 0;
}