#include <vector>
#include <iostream>

using namespace std;

class Reward
{
public:
    virtual ~Reward() = default;
    virtual float worth() const = 0;
};

class Coinpile : public Reward
{
public:
    Coinpile(int amount)
        : amount {amount}
    {}
    
    float worth() const override
    {
        return amount * 13;
    }

private:
    int amount;
};

class Diamond : public Reward
{
public:
    Diamond(float radius)
        : radius {radius}
    {}
    
    float worth() const override
    {
        return 4.0 / 3.0 * 3.14 * radius * radius * radius;
    }

private:
    float radius;
};

float total_worth(Reward const& r1, Reward const& r2, Reward const& r3)
{
    float sum {};
    sum += r1.worth();
    sum += r2.worth();
    sum += r3.worth();
    return sum;
}

int main()
{
    Diamond reward1 {3.8f};
    Coinpile reward2 {5};
    Diamond reward3 {0.1f};

    float total { total_worth(reward1, reward2, reward3) };
    std::cout << "Total worth from your three rewards: " << total << std::endl;
    return 0;
}