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import java.lang.Math;
import java.util.ArrayList;


public class Student
{
  private String name;
  private String group;
  private int date;

  public Student()
  {}

  public Student (String name, String group, int date)
  {
    this.name = name;
  	this.group = group;
    this.date = date;
  }




  public String getName()
  {
  	return name;
  }

  public void setName(String name)
  {
    this.name=name;
  }

  public String getGroup()
  {
  	return group;
  }

  public void setGroup(String group)
  {
  	this.group=group;
  }

  public int getDate()
  {
  	return date;
  }

  public void setDate(int date)
  {
  	this.date = date;
  }

  @Override
  public String toString()
  {
  	return ("Student name : " + this.name + "\n" +
            "Student group : " + this.group + "\n" +
            "Student date : " + this.date);
  }

}



public class MyRunningClass
{
  public static void main(String[] args)
  {
	Student student1 = new Student("Adrien", "A", 10);
    Student student2 = new Student("Bruno", "A", 8);
    Student student3 = new Student("Corentin", "B", 5);
    Student student4 = new Student("David", "C", 6);
    Student student5 = new Student("Adrien", "B", 21);
    Student student6 = new Student("Eddy", "D", 2);
    Student student7 = new Student("Bruno", "D", 4);

    ArrayList<Student> students = new ArrayList<Student>();

    students.add(student1);
    students.add(student2);
    students.add(student3);
    students.add(student4);
    students.add(student5);
    students.add(student6);
    students.add(student7);

    for (int i=0; i<students.size(); i++)
    {
    	System.out.println(students.get(i).toString() + "\n");
    }

    System.out.println("-----------------------------");
    System.out.println("-----------------------------");
    System.out.println("-----------------------------");

    ArrayList<Student> result = takePresence(students, "A");

    for (int i=0; i<result.size(); i++)
    {
    	System.out.println(result.get(i).toString() + "\n");
    }

  }


  public static ArrayList<Student> takePresence(ArrayList<Student> allStudents, String group)
  {
    ArrayList<Student> lastGroup = new ArrayList<Student>();

  	for (int i=0; i<allStudents.size(); i++)
    {
      	Student currentStudent = allStudents.get(i);
      	if(currentStudent.getGroup().equals(group))
        {
          if(lastGroup.contains(currentStudent))
          {
            int index = allStudents.indexOf(currentStudent);
            Student tempStudent = lastGroup.get(index);
            if(tempStudent.getDate()<currentStudent.getDate())
            {
              lastGroup.remove(index);
              lastGroup.add(currentStudent);
            }
          }
          else
          {
          	lastGroup.add(currentStudent);
          }
        }
    }

    return lastGroup;
  }
}