public interface StoreFunc {
    void getIn (int gi); //вход в магазин
    void buyProds (int bp); //приобретение товаров
    void setState (int s); //изменение статуса кассира/магазина
    void show();
}
 
class Cashier {
    String badge; //бейдж, указывающий имя кассира
    int state; //состояние кассира (1 – за кассой, 0 – не на рабочем месте)
    Cashier (String bd) {
        this.badge = bd;
        this.state = 0; 
    }
    public String getBadge() {
        return badge;
    }
    public void setBadge(String badge) {
        this.badge = badge;
    }
    public int getState() {
        return state;
    }
    public void setState(int state) {
        this.state = state;
    }
}
 
class Store implements StoreFunc {
    String address; //адрес магазина
    int openingHours; //количество рабочих часов в день
    int state; //состояние магазина (1 – открыто, 0 – закрыто)
    static int maxProfit; //статическое данное – максимальный доход в день
    Cashier c;
    Store (String ad, int oh, String bd) {
        this.address = ad;
        this.openingHours = oh;
        this.state = 1;
        c = new Cashier (bd);
    }
    public String getAddress() {
        return address;
    }
    public void setAddress(String address) {
        this.address = address;
    }
    public int getOpeningHours() {
        return openingHours;
    }
    public void setOpeningHours (int openingHours) {
        this.openingHours = openingHours;
    }
    public int getState() {
        return state;
    }
    public void setState(int state) {
        this.state = state;
    }
    public void getIn (int gi) {
        try {
            if (state != 1) throws IllegalArgumentException exc;
        }
    }
    public void buyProds (int bp) {
        try {
            if (state != 1) throws IllegalArgumentException exc;
            if (c.state == 0) throws IndexOutOfBoundException exc;
        }
    }
    static int getMaxProfit() {
        return maxProfit;
    }
    static void setMaxProfit (int maxProfit) {
        this.maxProfit = maxProfit;
    }
}
 
class Products {
    String farm; //название фермы-поставщика продукта
    String shelfLife; //дата – проверка сроков годности продуктов
    Products (String f, String sl) {
        this.farm = f;
        this.shelfLife = sl;
    }
    public String getFarm() {
        return farm;
    }
    void setFarm(String farm) {
        this.farm = farm;
    }
    public String getShelfLife() {
        return shelfLife;
    }
    void setShelfLife(String shelfLife) {
        this.shelfLife = shelfLife
    }
}
 
class ProductStore extends Store {
    Products prod;
    ProductStore (String ad, int oh, String bd, String f, String sl){
        super (ad, oh, bd);
        prod = new Products (f, sl);
    }
    void show() {
        System.out.println(…);
    }
}
 
public class Main{
    public static void main (String[] args){
        Store store = new Store(“Moskovskaya 2”, 8, “Ivanov”);
        store.getIn (10);
        store.c.changeState(1);
        store.buyProds(15);
        ProductStore pStore = new ProductStore (“Krimskaya 5”, 6, “Petrov”, “Green Farm”, “04.06.2021”);
        StoreFunc store1;
        store1 = store;
        store1.show();
        store1 = pStore;
        store1.show();
    }
}