@SuppressWarnings("unchecked")
	public IndexMinPQ(int maxN)
	{
		items = (Item[]) new Comparable[maxN + 1];
		pq = new int[maxN + 1];
		qp = new int[maxN + 1];
		for (int i = 0; i < maxN; i++)
			qp[i] = -1;
		N = 0;
	}