struct Shelter : vec2 {
    Shelter() {
        turns = 0;
    }
    Shelter(int x, int y, int energy) {
        this->x = x;
        this->y = y;
        this->energy = energy;
        turns = 0;
    }
    int energy;
    int turns;
};


for (int i = 0; i < shelters.size(); i++) {
            shelters[i].turns++;
        }