public List<TOE> next() {
List<TOE> ret = new LinkedList<TOE>();
for (int i = 0; i < N; i++)
for (int j = 0; j < M; j++)
// if(G.get(i*M+j))
{
BitSet Gnew = (BitSet) (G.clone());
int[] x = {0, 1, -1, 0, 0};
int[] y = {0, 0, 0, 1, -1};
for (int k = 0; k < 5; k++) {
int xi = x[k];
int yi = y[k];
if ((i + xi) >= 0 && (i + xi) < N && (j + yi) >= 0 && (j + yi) < M) {
Gnew.flip((i + xi) * M + (j + yi));
}
}
TOE to = new TOE(N, M, Gnew);
to.mx = i;
to.my = j;
ret.add(to);
}
return ret;
}
