public class RegularTicket {
    protected int id;
    public int days;

    public RegularTicket(int days) {
        days = this.days;
        id = 1; //type of ticket
    }

    public int getPrice() {
        return 40;
    }

    public int getId() {
        return id;
    }

    public int getDays() {
        return days;
    }

    public String toString() {
        return "The ticket number is " + id + " and the price is" + getPrice() + ".";
    }

}


public class WalkupTicket extends RegularTicket {

    public WalkupTicket(int days) {
        super(days);
        id = 2;
    }

    public int getPrice() {
        return 50;
    }

    public String toString() {
        return "The ticket number is " + id + " and the price is" + getPrice() + ". This is a walkup ticket.";
    }
}


public class AdvanceTicket extends RegularTicket {


    public static final int deadline1 = 15;
    public static final int deadline2 = 20;

    public AdvanceTicket(int days) {
        super(days);
        id = 3;
    }

    public int getPrice() {
        return (days > 19) ? deadline1 : (days > 9) ? deadline2 : super.getPrice();
    }

}


public class StudentAdvanceTicket extends AdvanceTicket {

    public StudentAdvanceTicket(int days) {
        super(days);
        id = 4;
    }

    public int getPrice() {
        return (days > 19) ? deadline1/2 : (days > 9) ? deadline2/2 : super.getPrice()/2;
    }

}