// CSE 143, Winter 2011, Marty Stepp                                             
// This "mystery" program uses ArrayLists.                                 
                                                  
import java.util.*;                                                    
                                                         
public class Mystery2 {                               
    public static void main(String[] args) {                                            
        ArrayList<Integer> list = new ArrayList<Integer>();                                               
        for (int i = 1; i <= 5; i++) {                                                      
            list.add(2 * i);   // [2, 4, 6, 8, 10]                                     
        }                                                   
        System.out.println(list);                               
                                    
//        int size = list.size();                                 
//        for (int i = 1; i < 2*size; i += 2) {                                         
//            list.add(i, 42);   // add 42 at index i                                                   
//            System.out.println(list);                                                         
//        }

        for (int i = list.size(); i > 0; i--) {
        	list.add(i, 42);
        }
        
        System.out.println(list);
    }
}