18.java18

import java.util.*;
class student
{
    int roll;
    void accept()
    {
        Scanner t = new Scanner (System.in);
        System.out.println("enter roll no.");
        roll = t.nextInt();
    }
    void display()
    {
        System.out.println("Roll no "+roll);
    }
}
class test extends student
{
    int m1,m2;
    void accept()
    {
        super.accept();
        Scanner t = new Scanner(System.in);
        System.out.println("enter m1 and m2");
        m1 = t.nextInt();
        m2 = t.nextInt();
    }
    void display()
    {
        super.display();
        System.out.println("m1 = "+m1+"m2 = "+m2);
    }
}
interface sport
{
    final static int score = 99;

}
class result extends test implements sport
{
    int total=0;
    void accept()
    {
        super.accept();
        total = m1+m2+score;
    }
    void display()
    {
        super.display();
        System.out.println("Score = "+score);
        System.out.println("Total = "+total);
    }
}
class java18
{
    public static void main(String args[])
    {
        result r = new result();
        r.accept();
        r.display();
    }
}