private static boolean checkConstraints(int nodes, int n) {
int neighbours[] = g.getNeighbours(n);
for (int j = 0; j < neighbours.length; j++) {
if (neighbours[j] == 1) {
if (colorOfNode[n] == colorOfNode[j]) return false;
}
}
pruneTheDomain(nodes);
return true;
}
private static void pruneTheDomain(int nodes) {
for (int i = 0; i < nodes; i++) {
if (colorOfNode[i] != 0) {
int neighbours[] = g.getNeighbours(i);
for (int j = 0; j < neighbours.length; j++) {
if (neighbours[j] == 1) {
for (int k = 0; k < noOfColors; k++) {
if (domainOfNode[j][k] == colorOfNode[i]) {
domainOfNode[j][k] = 0;
}
}
}
}
}
}
}
private static boolean checkEverything(int nodes) {
for (int i = 0; i < nodes; i++) {
if (colorOfNode[i] != 0) {
int neighbours[] = g.getNeighbours(i);
for (int j = 0; j < neighbours.length; j++) {
if (neighbours[j] == 1) {
if (colorOfNode[i] == colorOfNode[j]) {
// System.out.println("color is same " + i + " " + j);
return false;
}
}
}
} else {
// System.out.println("no color");
return false;
}
}
return true;
}