class Person
{
	 String Name;
	 String Email;
	 int Age;
	public Person(String name, String email, int age) {
		Name = name;
		Email = email;
		Age = age;
	}
	public void Identify()
	{
		System.out.println("Name: "+Name+"Email: "+Email+"Age: "+ Age);
	}
	public String getName()
        {
		return Name;
	}
	public String getEmail()
        {
		return Email;
	}
	public int getAge()
        {
		return Age;
	}
}
interface Worker
{
	int getSalary();
}
interface AcademicInterest
{
	String getInterest();
}
class Student extends Person implements AcademicInterest
{
	int avgrade;
	String interest;
	public Student(String name, String email,int age,String interest,int avgrade)
        {
		super(name, email, age);
		this.interest = interest;
		this.avgrade = avgrade;
	}
	@Override
	public String getInterest()
        {
		return interest;
	}
	public int getAvgrade()
	{
		return avgrade;
	}
}
class Teacher extends Person implements Worker,AcademicInterest
{
	int rating;
	String interest;
	int salary;
	public Teacher(String name, String email,int age,String interest,int rating,int salary)
        {
		super(name, email, age);
		this.rating = rating;
		this.interest = interest;
		this.salary = salary;
	}
	@Override
	public String getInterest()
        {
		return interest;
	}
	@Override
	public int getSalary()
        {
		return salary;
	}
	int getRating()
	{
		return rating;
	}
	@Override
	public void Identify()
	{
		System.out.println(Name+" is a teacher.");
	}

}
class Plummer extends Person implements Worker
{
	int salary;
	public Plummer(String name,String email,int age,int salary)
        {
		super(name,email,age);
		this.salary = salary;
	}
	@Override
	public void Identify()
	{
		System.out.println(Name+" is a plummer.");
	}
	@Override
	public int getSalary()
        {
		return salary;
	}
}
public class exc1
{
	public static void main(String [] args)
	{
		Person ppl[] = new Person[10];

		ppl[0] = new Person("Dan","mit@gmail.com",38);
		ppl[1] = new Plummer("John","john@gmail.co",48,15000);
		ppl[2] = new Student("Jacob","jacob@gmail.com",24,"Java",6);
		ppl[3] = new Student("Ian","ian@gmail.com",22,"Java",8);
		ppl[4] = new Student("Coolio", "coolio@gmail.com",25,"Management",9);
		ppl[5] = new Student("Mark","mark@gmail.com",23,"Java",8);
		ppl[6] = new Teacher("Fran","fran@gmail.com",48,"Java",8,80000);
		ppl[7] = new Teacher("Richie", "richie@gmail.com",52,"Java",8,49900);
		ppl[8] = new Teacher("Roger", "roger@gmail.com",39,"Management",8,70000);
		ppl[9] = new Teacher("Hmer", "homer@gmail.com",42,"Management",6,40000);
		Worker worker = new Worker()
                {
			@Override
			public int getSalary()
                        {
				return 100;
			}
		};
		int choice = 0;
		while(choice != 0)
		{
			if(choice == 1)
			{
				continue;
			}
			if(choice == 2)
			{
				for(int i = 0;i<ppl.length;i++)
				{
					if(ppl[i] instanceof Teacher)
					{
						Teacher tmp = (Teacher)ppl[i];
						if(tmp.getSalary()>20000)
						{
							System.out.println(tmp);
						}
					}
					else if(ppl[i] instanceof Plummer)
					{
						Plummer tmp = (Plummer)ppl[i];
						if(tmp.getSalary() > 20000)
						{
							System.out.println(tmp);
						}
					}
				}
			}
			else if(choice == 3)
			{
				for(int i=0;i<ppl.length;i++)
				{
					if(ppl[i] instanceof Teacher)
					{
						Teacher tmp = (Teacher)ppl[i];
						if(tmp.getRating() > 7)
						{
							System.out.println(tmp);
						}
					}
				}
			}
			else if(choice == 4)
			{
				int java = 0;
				int man = 0;
				int finance = 0;
				for(int i=0;i<ppl.length;i++)
				{
					if(ppl[i] instanceof Teacher)
					{
						Teacher tmp = (Teacher)ppl[i];
						if(tmp.getInterest().equals("Java"))
						{
							java++;
						}
						else if(tmp.getInterest().equals("Management"))
						{
							man++;
						}
						else finance++;
					}
					else if(ppl[i] instanceof Student)
					{
						Student tmp = (Student)ppl[i];
						if(tmp.getInterest().equals("Java"))
						{
							java++;
						}
						else if(tmp.getInterest().equals("Management"))
						{
							man++;
						}
						else finance++;
					}
					System.out.println("Java :" + java + " Management: " + man + " Finance: " + finance);
				}
			}
			else if(choice == 5)
			{
			}
		}
	}

}