#include <vector>
#include <iostream>

using namespace std;

// Implementera dina klasser här.

int main()
{   
    int value{0};

    Add a1{3};
    Square s1{};
    Add a2{1};
    Square s2{};
    std::vector<Behaviour*> behaviours { &a1, &s1, &a2, &s2 };
    
    for ( Behaviour* behaviour_pointer : behaviours )
    {
	value = (*behaviour_pointer).apply(value);
    }
    std::cout << value << std::endl;

}