class ClassOfStudents1 { 
    private static final int N = 1000;
    private Student[] classMembers;
    private int number;

    // Constructor: make array, set number to zero.
    public ClassOfStudents1() {
	classMembers = new Student[N];
	number = 0;
    }
    
    public boolean insert(Student newStudent) {
	if (number==N) 
	    return false;
	classMembers[number++] = newStudent;
	return true;
    }

    public Student find(String findsurname) {
	for (int i = 0; i < number; i++) {
	    if (classMembers[i].surname.equals(findsurname)) {
		return classMembers[i];
	    }
	}
	return null;
    }
}