#include <vector>
#include <iostream>

class parent
{
    public:
        void print();
        virtual void generate() = 0;
    protected:
        std::vector<int> seq;
};

void parent::print()
{
    generate();
    for (size_t i = 0; i < seq.size(); ++i)
    {
        std::cout << seq[i] << " ";
    }
    std::cout << std::endl;
}

class child1:
    public parent
{
    public:
        void generate();
};

void child1::generate()
{
    seq.assign(10, 5);
}

class child2:
    public parent
{
    public:
        void generate();
};

void child2::generate()
{
    seq.resize(10);
    for (size_t i = 0; i < 10; ++i)
    {
        seq[i] = i;
    }
}

int main()
{
    child1 c1;
    child2 c2;
    c1.print();
    c2.print();
    return 0;
}