///////////////////////// Test //////////////////////////
public static void test(RotateImage r, int[][] m) {
System.out.println("-------- Before ---------");
ListPrinter.print2DArray(m);
System.out.println("-------- After ---------");
r.rotate(m);
ListPrinter.print2DArray(m);
System.out.println();
}
//////////////////////// TEST ////////////////////////
private static void test(BinaryTreeLevelOrderTraversal solution, String[] s) {
TreeNode root = TreeNode.buildTree(s);
List<List<Integer>> result = solution.levelOrder(root);
ListPrinter.print2DList(result);
System.out.println();
}