private void updatePlatterQuantities(int[] platter, int round) {
        for (int i=0; i < platter.length; i++) {
            if (round == FIRST) {
                platter[i] -= r0_seen_fruit[i];
            }
            else {
                platter[i] -= r1_seen_fruit[i];
            }
            if (platter[i] < 0) platter[i] = 0; // accounts for possible negative values
        }
    }