@SuppressWarnings("unused")
private void read(String filename) {
try {
InDataStreamFile rF = new InDataStreamFile(filename);
xSize = rF.readInt();
ySize = rF.readInt();
int number = rF.readInt();
px = new int[xSize];
py = new int[ySize];
pxy = new int[xSize][ySize];
for (int i = 0; i < xSize; i++) {