int[] mass = {1, 2}; 
List<String> list = new ArrayList(10); 
list.add("03"); 
list.add("04"); 
System.out.println(mass.length + list.size() + ".");

class Base { 
    protected void foo() {} 
}  
class Derived extends Base { 
    void foo() {} 
}  
public class Main { 
    public static void main(String args[]) { 
        Derived d = new Derived(); 
        d.foo(); 
    } 
}

 First 
{ 
    public First() {  System.out.println("a"); } 
} 
   
class Second extends First 
{ 
    public Second()  {  System.out.println("b"); } 
} 
   
class Third extends Second 
{ 
    public Third()   {  System.out.println("c"); } 
} 
   
public class MainClass 
{ 
    public static void main(String[] args) 
    { 
        Third c = new Third(); 
    } 
}

 class Calculator 
{ 
    int num = 100; 
    public void calc(int num)  { this.num = num * 10;  } 
    public void printNum()     { System.out.println(num); } 
  
    public static void main(String[] args) 
    { 
        Calculator obj = new Calculator(); 
        obj.calc(2); 
        obj.printNum(); 
    } 
}