class MyPartyE {
    public static void main(String[] arg) {
        CoffeeCupE.setRatio(0.8F);
        CoffeeCupE c1 = new CoffeeCupE(), c2 = new CoffeeCupE();
        c1.fill();
        c2.fill();
        c1.drink(20);
        c2.drink(50);
        System.out.println(c1.getAmount());
        System.out.println(c2.getAmount());
    }
}