39 

    39 

    40 /* the easiest way to get statistics */

    40 /* the easiest way to get statistics */

    41 static unsigned long iterations = 0;

    41 static unsigned long iterations = 0;

    42 

    42 

    43 typedef struct Field Field;

    43 typedef struct Field Field;

    44 typedef Field **Board;

    45 typedef Field **Board;

    45 

    46 

    46 /**

    47 /**

    47  * read nxn fields from commandline and store it in the Board variable

    48  * read nxn fields from commandline and store it in the Board variable

    48  */

    49  */

   127  * go recursive from k to DIM^2 and try to solve the puzzle

   128  * go recursive from k to DIM^2 and try to solve the puzzle

   128  */

   129  */

   129 int solveBoard (Board board, int k)

   130 int solveBoard (Board board, int k)

   130 {

   131 {

   131     u_int i;

   132     u_int i;

   132     int q;

   134     int q;

   133 

   135 

   134     if ((++iterations > MAX_ITERATIONS))

   136     if ((++iterations > MAX_ITERATIONS))

   135         return FALSE;

   137         return FALSE;

   136 

   138 

   179 }

   181 }

   180 

   182 

   181 int main (int argc, char **argv)

   183 int main (int argc, char **argv)

   182 {

   184 {

   183     Board b;

   185     Board b;

   184     int i;

   187     int i;

   185     int ret;

   189     int ret;

   186     int colored = 0;

   191     int colored = 0;

   187 

   192 

   188     while ((i = getopt (argc, argv, "ch")) != -1) {

   193     while ((i = getopt (argc, argv, "ch")) != -1) {

   189         switch (i) {

   194         switch (i) {

   190         case 'h':

   195         case 'h':