Q. Write code to traverse a tree and return the sum of the values (Node.getValue()) of all nodes at the level N in the tree?
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package tree; import java.util.List; public interface Node<E> { E getValue(); List<Node<E>> getChildren(); } |
A. Let’s have a basic implementation of the above Node interface.
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package tree; import java.util.List; public class NodeImpl<E> implements Node<E> { private E value; private List<Node<E>> children; public NodeImpl(E value, List<Node<E>> children) { this.value = value; this.children = children; } public E getValue() { return value; } public List<Node<E>> getChildren() { return children; } } |
Here is…
