class Enemy {
    int attackPower;
public:
    void setAttackPower(int _attackPower) { attackPower = _attackPower; }
    int getAttackPower() { return attackPower; }
};

class Ninja: public Enemy {
public:
    void attack() {
        cout << "Ninja -" << getAttackPower() << endl;
    }
};

class Soldier : public Enemy {
public:
    void attack() {
        cout << "Soldier -" << getAttackPower() << endl;
    }
};

int main(void) {
    Ninja ninja;
    Soldier soldier;
    Enemy *enemy1 = &ninja;
    Enemy *enemy2 = &soldier;

    enemy1->setAttackPower(20);
    enemy2->setAttackPower(50);

    ninja.attack();
    monster.attack();

    return 0;
}