Solution.java

import java.util.Comparator;
import java.util.PriorityQueue;
class Student {
 private final int id;
 private final String name;
 private final double cgpa;

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

 public int getID() {
 return id;
 }

 public String getName() {
 return name;
 }

 public double getCGPA() {
 return cgpa;
 }
}

class Priorities {
 
 private final PriorityQueue<Student> queue = new PriorityQueue<>(
 Comparator.comparing(Student::getCGPA).reversed()
 .thenComparing(Student::getName)
 .thenComparing(Student::getID));

 public List<Student> getStudents(List<String> events) {
 events.forEach((event) -> {
 if (event.equals("SERVED")) {
 queue.poll();
 } else {
 String[] details = event.split(" ");

 queue.add(new Student(Integer.parseInt(details[3]), details[1], Double.parseDouble(details[2])));
 }
 });

 List<Student> students = new ArrayList<>();
 while (!queue.isEmpty()) {
 students.add(queue.poll());
 }

 return students;
 }
}