@Test
public void testOffer() throws QuantilesException {

    System.out.println("offer");
    double[] quantiles = new double[]{0.05, 0.25, 0.5, 0.75, 0.95};
    Frugal2U instance = new Frugal2U(quantiles, 0);
    ExactQuantilesAll<Integer> exact = new ExactQuantilesAll<Integer>();
    
    RandomEngine r = new MersenneTwister64(0);
    Normal dist = new Normal(100, 50, r);
    int numSamples = 1000;
            
    for(int i = 0; i < numSamples; ++i) {
        int num = (int) Math.max(0, dist.nextDouble());
        instance.offer(num);
        exact.offer(num);
    }
    
    System.out.println("Q\tEst\tExact");
    for (double q : quantiles) {
        System.out.println(q + "\t" + instance.getQuantile(q) + "\t" + exact.getQuantile(q));
    }
    
    
}