ISCONNECTED
if (!ISCONNECTED(res, ncomp)) {
if (!ISCONNECTED(res, ncomp)) {
if (!ISCONNECTED(res, ncomp)) {
if (!ISCONNECTED(res, ncomp)) {
if (!ISCONNECTED(res, ncomp)) {
if (!ISCONNECTED(res, ncomp)) {
if (ISCONNECTED(res, ncomp)) {
if (!ISCONNECTED(gres, ii)) {
if (ISCONNECTED(res, ncomp)) {