Пример #1
0
static int
btor_picosat_inc_max_var (BtorSATMgr * smgr)
{
  return picosat_inc_max_var (smgr->solver);
}
Пример #2
0
int main(int argc, char **argv)
{
  int i,j,k,l,m;

  if (argc < 2) {
    fprintf(stderr, "usage: sudoku [puzzles]\n");
    exit(1);
  }

  picosat_init();
  /* picosat_enable_trace_generation(); */

  mapFile = fopen("var-map.txt", "w"), assert(mapFile);
  cnfFile = fopen("general.cnf", "w"), assert(cnfFile);
  if (0 == strcmp(argv[1], "-") || argc <= 1) {
    inputFile = stdin;
  } else {
    inputFile = fopen(argv[1], "r");
  }

  /* create vars */
  for (j = 0; j < N; j++) {
    for (k = 0; k < N; k++) {
      for (i = 0; i < N; i++) {
        p[i][j][k] = picosat_inc_max_var();
        fprintf(mapFile, "%d = p[%d][%d][%d]\n", p[i][j][k], i, j, k);
      }
    }
  }
  fprintf(stderr, "%d variables\n", picosat_variables());

  /* each cell set to at least one value */
  for (j = 0; j < N; j++) {
    for (k = 0; k < N; k++) {
      for (i = 0; i < N; i++) {
        picosat_add(p[i][j][k]);
      }
      picosat_add(0);
    }
  }

  /* each cell set to at most one value */
  for (j = 0; j < N; j++) {
    for (k = 0; k < N; k++) {
      for (i = 0; i < N; i++) {
        for (l = 0; l < N; l++) {
          if (i != l) {
            /* pijk -> !pljk (when l!=i) */
            picosat_add(-p[i][j][k]);
            picosat_add(-p[l][j][k]);
            picosat_add(0);
          }
        }
      }
    }
  }

  /* column: no cell has the same value */
  LINE(i,0,N, j,0,N, k,0,N, {
      for (l = 0; l < N; l++) {
        if (l != j) {
          picosat_add(-p[i][j][k]);
          picosat_add(-p[i][l][k]);
          picosat_add(0);
        }
      }
    });