import java.util.*;

enum TYPE { NORMAL, CASH_DISCOUNT, CASH_RETURN};

interface CashSuper {
    public (1);
}

class CashNormal implements CashSuper { // 正常收费子类
    public double acceptCash(double money) {
        return money;
    }
}


class CashDiscount implements CashSuper {
    private double moneyDiscount; // 折扣率
    public CashDiscount(double moneyDiscount) {
        this moneyDiscount = moneyDiscount; 
    }
    public double acceptCash(double money) {
        return money* moneyDiscount;
    }
}

class CashReturn implements CashSuper { // 满额返利
    private double moneyCondition;
    private double moneyReturn;
    public CashReturn(double moneyCondition, double moneyReturn) { 
        this.moneyCondition = moneyCondition; // 满额数额
        this.moneyReturn = moneyReturn; // 返利数额
    }
    public double acceptCash(double money) {
        double result = money;
        if(money >= moneyCondition )
            result = money - Math.floor(money / moneyCondition) * moneyReturn;
        return result;
    }
}

class CashContext {
    private CashSuper cs;
    private TYPE t;
    public CashContext(TYPE t) {
        switch(t) {
        case NORMAL: // 正常收费
            (2);
            break;
        case CASH_DISCOUNT: // 打8折
            (3);
            break;
        case CASH_RETURN: // 满300返100
            (4);
            break;
        }
    }
    public double GetResult(double money) {
        (5);
    }
    //此处略去main()函数
}