public int depth() {
		if(leftDepth() > rightDepth()) {
			return leftDepth();
		} else {
			return rightDepth();
		}
	}

	public int leftDepth() {
		if(getLeft() == null) {
			return 0;
		} else {
			return 1 + getLeft().depth();
		}
	}

	public int rightDepth() {
		if(getRight() == null) {
			return 0;
		} else {
			return 1 + getRight().depth();
		}
	}