// ArrayLists require an import
import java.util.ArrayList;

public class Main {
	public static void main(String[] args) {
		ArrayList<Integer> al = new ArrayList<Integer>();
		populateWithIntegers(al, 14);  // Create an ArrayList with 14 numbers
		System.out.println(al);
		System.out.println(sum(al));
		deleteEveryOther(al);
		System.out.println(al);
	}

	private static void populateWithIntegers(ArrayList<Integer> al, int n) {
		for (int i = 0; i < n; i++) {
			al.add(i*i);
		}
	}

	private static long sum(ArrayList<Integer> al) {
		long sum = 0;
		for (int num : al) {
			sum += num;
		}
		return sum;
	}

	private static void deleteEveryOther(ArrayList<Integer> al) {
		// Should delete every other number in the arraylist
		//
		// YOUR CODE HERE
	}
}