Hacker Rank - Day 12 : Inheritance

                    Hacker Rank - Day 14 : Scope

Solution In Java 8:

import java.util.*;

class Person {
    protected String firstName;
    protected String lastName;
    protected int idNumber;
   
    // Constructor
    Person(String firstName, String lastName, int identification){
        this.firstName = firstName;
        this.lastName = lastName;
        this.idNumber = identification;
    }
   
    // Print person data
    public void printPerson(){
         System.out.println(
                "Name: " + lastName + ", " + firstName
            +     "\nID: " + idNumber);
    }
   
}
class Student extends Person{
    private int[] testScores;
    Student(String firstName , String lastName , int id , int [] testScores){
        super(firstName , lastName , id);
        this.testScores = testScores;
    }
    public String calculate(){
        int sum = 0;
        for(int i = 0; i < testScores.length ; i++){
            sum = sum + testScores[i];
        }
        int avg = sum / testScores.length;
       
        if(avg >= 90 && avg <= 100)
            return "O";
        else if(avg >= 80 && avg < 90)
            return "A";
        else if(avg >= 70 && avg < 80)
            return "E";
        else if(avg >= 55 && avg < 70)
            return "P";
        else if(avg >= 40 && avg < 55)
            return "D";
        else
            return "T";
       
    }
  
}
class Solution {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        String firstName = scan.next();
        String lastName = scan.next();
        int id = scan.nextInt();
        int numScores = scan.nextInt();
        int[] testScores = new int[numScores];
        for(int i = 0; i < numScores; i++){
            testScores[i] = scan.nextInt();
        }
        scan.close();
       
        Student s = new Student(firstName, lastName, id, testScores);
        s.printPerson();
        System.out.println("Grade: " + s.calculate() );
    }
} 
Solution In Python 3: 

class Person:
    def __init__(self, firstName, lastName, idNumber):
        self.firstName = firstName
        self.lastName = lastName
        self.idNumber = idNumber
    def printPerson(self):
        print("Name:", self.lastName + ",", self.firstName)
        print("ID:", self.idNumber)
        
class Student(Person):
    def __init__(self,firstName,lastName,ids,testScores):
        super().__init__(firstName,lastName,ids)
        self.testScores = testScores
       
    def calculate(self):
        total = 0
        for testScore in self.testScores:
            total += testScore
        avg = total / len(self.testScores)
        if 90 <= avg <= 100:
            return 'O'
        if 80 <= avg < 90:
            return 'E'
        if 70 <= avg < 80:
            return 'A'
        if 55 <= avg < 70:
            return 'P'
        if 40 <= avg < 55:
            return 'D'
        return 'T'
        
line = input().split()
firstName = line[0]
lastName = line[1]
idNum = line[2]
numScores = int(input()) # not needed for Python
scores = list( map(int, input().split()) )
s = Student(firstName, lastName, idNum, scores)
s.printPerson()
print("Grade:", s.calculate())