package exercise07;

import java.math.BigInteger;
import java.util.LinkedList;
import java.util.List;

import exercise06.Checkable;
import exercise06.Person;
import exercise05.Course;

public class University implements Checkable {

	List<Person> people = new LinkedList<>();
	List<Course> courses = new LinkedList<>();
	
	public BigInteger calculateBalance() {
		BigInteger sum = BigInteger.ZERO;
		for (Person person : people) {
			sum = sum.add(person.balance());
		}
		return sum;
	}
	
	@Override
	public boolean check() {
		for (Person person : people) {
			if (!person.check()) {
				return false;
			}
		}
		return true;
	}
	
}