gistfile1.txt

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class Student {

    String name;
    double cpga;
    int id;

    public Student(String name, double cpga, int id) {
        this.id = id;
        this.name = name;
        this.cpga = cpga;
    }

    public String getName() {
        return name;
    }

    public double getCpga() {
        return cpga;
    }

    public int getId() {
        return id;
    }
}

public class Priorities {

    public List<Student> getStudents(List<String> events) {
        PriorityQueue<Student> priorityQueue0 = new PriorityQueue<Student>(Collections.reverseOrder(Comparator.comparingDouble(Student::getCpga)));

        for (String event : events) {

            String[] characteristics = event.split("\\s+");

            if (characteristics[0].equals("ENTER")) {
                String name = characteristics[1];
                double cpga = Double.parseDouble(characteristics[2]);
                int id = Integer.parseInt(characteristics[3]);
                Student student = new Student(name, cpga, id);
                priorityQueue0.add(student);
            }

            if (characteristics[0].equals("SERVED")) {

                PriorityQueue<Student> priorityQueue1 = new PriorityQueue<Student>(Comparator.comparing(Student::getName));
                PriorityQueue<Student> priorityQueue2 = new PriorityQueue<Student>(Collections.reverseOrder(Comparator.comparing(Student::getId)));

                for (Student student : priorityQueue0) {
                    Student next = priorityQueue0.remove();
                    Double nextCgpa = next.getCpga();
                    if (!priorityQueue0.isEmpty() && priorityQueue0.peek().getCpga() != nextCgpa) {
                    } else {
                        priorityQueue1.add(next);
                    }
                    for (Student student1 : priorityQueue1) {
                        Student next1 = priorityQueue1.remove();
                        String nextName = next1.getName();
                        if (!priorityQueue1.isEmpty() && !priorityQueue1.peek().getName().equals(nextName)) {
                        } else {
                            priorityQueue2.add(next1);
                        }
                        for (Student student2 : priorityQueue2) {
                            priorityQueue0.offer(student);
                        }
                    }
                }
            }
        }
        List<Student> allStudents = new ArrayList<Student>(priorityQueue0);
        return allStudents;
    }
}

public class Solution {
    private final static Scanner scan = new Scanner(System.in);
    private final static Priorities priorities = new Priorities();

    public static void main(String[] args) {
        int totalEvents = Integer.parseInt(scan.nextLine());
        List<String> events = new ArrayList<>();

        while (totalEvents-- != 0) {
            String event = scan.nextLine();
            events.add(event);
        }

        List<Student> students = priorities.getStudents(events);

        if (students.isEmpty()) {
            System.out.println("EMPTY");
        } else {
            for (Student st: students) {
                System.out.println(st.getName());
            }
        }
    }
}