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

public class OOP {
    public static void main(String[] args) {
        // Sample sm1 = new Sample();
        //
        // HashMap<String, Integer> something = new HashMap<>();
        // something.put("Abc", 2);
        // something.put("QWE", 6);
        // something.put("ASD", 14);
        //
        // Sample.printSortedMap(something);

        Scanner sc = new Scanner(System.in);

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

        HillelStudent st1 = new HillelStudent();
        HillelStudent st2 = new HillelStudent();
        HillelStudent st3 = new HillelStudent();

        System.out.println("Enter first name:");
        st1.firstName = sc.nextLine();

        System.out.println("Enter last name:");
        st1.lastName = sc.nextLine();

        st2.firstName = "Bob";
        st2.lastName = "Thornton";

        st1.addGrade(5);
        st1.addGrade(4);
        st1.addGrade(4);
        st1.addGrade(4);
        st1.addGrade(5);

        st1.countAverageGrade();
        System.out.println(st1.getFullName() + " was " + st1.getFinalGrade());

        st2.addGrade(3);
        st2.addGrade(3);
        st2.addGrade(2);
        st2.addGrade(4);

        st2.countAverageGrade();

        // st2.allGrades.add(-300);
        System.out.println(st2.getFullName() + " was " + st2.getFinalGrade());

    }
}

class HillelStudent {
    static String school = "Hillel IT School";

    String firstName;
    String lastName;
    String address;
    String phoneNumber;
    private ArrayList<Integer> allGrades = new ArrayList<>();
    Float averageGrade;

    public String getFullName() {
        return this.firstName + " " + this.lastName;
    }

    public void addGrade(Integer grade) {
        if (grade < 0 || grade > 5)
            System.out.println("Bad grade input!");
        else
            this.allGrades.add(grade);
    }

    public void countAverageGrade() {
        Integer sum = 0;
        for (Integer grade : allGrades)
            sum = sum + grade;

        this.averageGrade = sum.floatValue() / allGrades.size();
    }

    public String getFinalGrade() {
        this.countAverageGrade();

        String grade = "";

        if (this.averageGrade.equals(5.0))
            grade = "Excellent";
        else if (this.averageGrade > 4)
            grade = "Very Good";
        else if (this.averageGrade > 3)
            grade = "Good";
        else {
            grade = "Really bad";
        }

        return grade;
    }
}