public int getMax(int start, int end) {
		if (this.start == start && this.end == end)
			return maxVal;
		int mid = (this.start + this.end) / 2;
		if (start <= mid && end <= mid)
			return left.getMax(start, end);
		if (start > mid && end > mid)
			return right.getMax(start, end);
		return Math.max(left.getMax(start, mid), right.getMax(mid + 1, end));
	}