public class PersonDriver02 {
    public static void main(String[] args) {
        
    }
}

class Person {
    private String name;
    private int age;
    private String address;
    
    //methods for the class
    
    public Person(String n, int a, String addr) {
        setName(n);
        setAge(a);
        setAddress(addr);
    }
    
    public void setName(String n) {
        if (n == null || n.isEmpty()) {
            throw new IllegalArgumentException("name cannot be empty (or null)");
        }
        name = n;
    }
    
    public String getName() {
        return name;
    }
    
    public void setAge(int yearsOld) {
        if (yearsOld < 0) {
            throw new IllegalArgumentException("age cannot be negative");
        }
        age = yearsOld;
    }
    
    public int getAge() {
        return age;
    }
    
    public void setAddress(String addr) {
        if (addr == null || addr.isEmpty()) {
            throw new IllegalArgumentException("address cannot be empty (or null)");
        }
        address = addr;
    }
    
    public String getAddress() {
        return address;
    }
    
    public String getTitle() {
        return name;
    }
    
    public String toString() {
        return name+" ("+age+" years old), at address: "+address;
    }
}
class HourlyEmployee extends Person {
    private int employeeNum;
    private double payRate;
    private double hoursWorked;
    
    //methods for the class
    
    public HourlyEmployee(String n, int a, String addr, int employeeNumber, double payRate) {
        super(n, a, addr);
        setEmployeeNumber(employeeNumber);
        setPayRate(payRate);
        setHoursWorked(0);
    }
    
    public void setEmployeeNumber(int num) {
        employeeNum = num;
    }
    
    public int getEmployeeNumber() {
        return employeeNum;
    }
    
    public void setPayRate(double rate) {
        if (rate <= 0) {
            throw new IllegalArgumentException("pay rate cannot be less than or equal to 0");
        }
        payRate = rate;
    }
    
    public double getPayRate() {
        return payRate;
    }
    
    protected void setHoursWorked(double hours) {
        if (hours < 0) {
            throw new IllegalArgumentException("hours worked cannot be less than 0");
        }
        hoursWorked = hours;
    }
    
    public double getHoursWorked() {
        return hoursWorked;
    }
    
    public void incrementHoursWorked(double change) {
        if (hoursWorked + change <= 0) {
            throw new IllegalArgumentException("total hours worked cannot be less than 0");
        }
        hoursWorked += change;
    }
    
    public String getTitle() {
        return name + ", hourly employee";
    }
    
    public String toString() {
        return super.toString()+"\n"+"  Hourly Employee (#"+employeeNum+")";
    }
}

class SalariedEmployee extends Person {
    private int employeeNum;
    private double payAmount;
    
    //methods for the class
    
    public SalariedEmployee(String n, int a, String addr, int employeeNumber, double payAmount) {
        super(n, a, addr);
        setEmployeeNumber(employeeNumber);
        setPayAmount(payAmount);
    }
    
    public void setEmployeeNumber(int num) {
        employeeNum = num;
    }
    
    public int getEmployeeNumber() {
        return employeeNum;
    }
    
    public void setPayAmount(double amount) {
        if (amount <= 0) {
            throw new IllegalArgumentException("pay cannot be less than or equal to 0");
        }
        payAmount = amount;
    }
    
    public double getPayAmount() {
        return payAmount;
    }
    
    public String getTitle() {
        return name + ", salaried employee";
    }
    public String toString() {
        return super.toString()+"\n"+"  Salaried Employee (#"+employeeNum+")";
    }
}