import java.util.ArrayList;

public class ExtArrayList extends ArrayList<Object> {
    public ExtArrayList slicer(int start, int count) {
        ExtArrayList extArrayList = new ExtArrayList();
        if (start >= 0) {
            if (count + start > 20 || count < 0) { //ask about when count is less than 0 bc idk what the documentation means
                for (int i = start; i < 20; i++) {
                    extArrayList.add(get(i));
                }
            } else {
                while (count > 0) {
                    extArrayList.add(get(start++));
                    count--;
                }
            }
        } else {
            int newStart = size() + start;
            while (count > 0) {
                extArrayList.add(get(newStart++));
                count--;      
            }
        }
        return extArrayList;
    }
    public static void main(String[] args) {
        ExtArrayList numbersList = new ExtArrayList();
        for (int i = 1; i <= 20; i++) {
            numbersList.add(i);
        }
        ExtArrayList slicedOutput = numbersList.slicer(-3,2);
        System.out.println(slicedOutput);
    }
}