#include <iostream>
#include <vector>

using namespace std;

class Bryla
{
private:
    int a;
    int h;

public:
    Bryla(int a = 0, int h = 0)
    {
        this->a = a;
        this->h = h;
    }

    int Objetosc()
    {
        return a * a * h;
    }
};
int main()
{
    vector<Bryla *> vectorek;
    vectorek.push_back(new Bryla(5,5));
    vectorek.push_back(new Bryla(6,3));
    vectorek.push_back(new Bryla(7,3));
    vectorek.push_back(new Bryla(1,3));

    int sum = 0;
    for(int i = 0; i < vectorek.size(); ++i)
    {
        sum += vectorek[i]->Objetosc();
    }
    double average = static_cast<double> (sum) / vectorek.size();

    cout << "srednia objetosc = " << average;


    return 0;
}