change value of constant.
@@ -75,7 +75,7 @@ public class Sudoku {
public static final int SIZE = 9;
private static final int BLOCKSIZE = 3;
- public static final Integer[][] UNSOLVABLE_SUDOKU = new Integer[0][0];
+ public static final Integer[][] UNSOLVABLE_SUDOKU = null;
public static void main(String... args)
throws InvalidConfigurationException, SolverException, InterruptedException, IOException {
