import java.util.Arrays;

public class ListMerger {
    public static LinkedList merge(LinkedList list1, LinkedList list2) {
        LinkedList result = new LinkedList();
        if (list1.count() == list2.count()) {
            Node node1 = list1.head;
            Node node2 = list2.head;
            for (int i = 0; i < list1.count(); i++) {
                result.addInTail(new Node(node1.value + node2.value));
                node1 = node1.next;
                node2 = node2.next;
            }
        }

        return result;
    }

    public static void main(String[] args) {
        LinkedList list1 = new LinkedList();
        list1.addInTail(new Node(1));
        list1.addInTail(new Node(2));
        list1.addInTail(new Node(3));

        LinkedList list2 = new LinkedList();
        list2.addInTail(new Node(1));
        list2.addInTail(new Node(2));
        list2.addInTail(new Node(3));

        LinkedList merged = merge(list1, list2);

        Arrays.stream(merged.toArray()).forEach(System.out::println);
    }
}