add remove method

Author: robert

src/com/algorithm/tree/AVLTree.java

@@ -98,4 +98,15 @@ protected BinaryTreeNode<T> doubleWithRightChild(BinaryTreeNode<T> k3) {
 		k3.right = roateWithLeftChild(k3.right);
 		return roateWithRightChild(k3);
 	}
+
+	@Override
+	public void remove(T x) {
+		BinaryTreeNode<T> node = findNode(root, x);
+		if (node == null || node.hintcount < 0) {
+			return;
+		} else {
+			lazyRemove(node);
+		}
+	}
+
 }