class FruitSeller
{
        final int APPLE_PRICE=1000;
        int numOfApple=20;
        int myMoney=0;
 
        public int saleApple(int money)
        {
                int num=money/APPLE_PRICE;
                numOfApple-=num;
                myMoney+=money;
                return num;
        }
 
        public void showSaleResult()
        {
                System.out.println("남은 사과개수 : " + numOfApple);
                System.out.println("총 수입 : " + myMoney);
        }
}
 
class FruitBuyer
{
        int myMoney=5000;
        int numOfApple=0;
 
        public void buyApple(FruitSeller seller, int money)
        {
                numOfApple+=seller.saleApple(money);
                myMoney-=money;
        }
 
        public void showBuyResult()
        {
                System.out.println("구입사과 : " + numOfApple);
                System.out.println("남은 예산 : " + myMoney);
        }
}
 
class Main
{
        public static void main(String[] args)
        {
                FruitSeller seller = new FruitSeller();
                FruitBuyer buyer = new FruitBuyer();
                buyer.buyApple(seller, 2000);
 
                System.out.println("판매자상황");
                seller.showSaleResult();
 
                System.out.println("구매자상황");
                buyer.showBuyResult();
        }
}

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