static int
btor_picosat_inc_max_var (BtorSATMgr * smgr)
{
return picosat_inc_max_var (smgr->solver);
}
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);
}
}
});