int dim = RelationUtil.dimensionality(relation); StringBuilder msg = new StringBuilder("Step 0"); for(Map.Entry<long[], List<ArrayModifiableDBIDs>> clusterList : clustersMap.entrySet()) { for(ArrayModifiableDBIDs c : clusterList.getValue()) { msg.append('\n').append(BitsUtil.toStringLow(clusterList.getKey(), dim)).append(" ids ").append(c.size());