Method depth

java/Chapter 4/Question4_9/Question.java:31–37

(TreeNode node)

	}
	
	public static int depth(TreeNode node) {
		if (node == null) {
			return 0;
		} else {
			return 1 + Math.max(depth(node.left), depth(node.right));
		}
	}
	
	public static void findSum(TreeNode node, int sum) {
		int depth = depth(node);