fgets (line, MAX_CLUE_LENGTH + 10, infile);
p.grid_frozen = atoi (line) == 0 ? false : true ;
fgets (line, MAX_CLUE_LENGTH + 10, infile);
fgets (line, MAX_CLUE_LENGTH + 10, infile);
p.grid_frozen = atoi (line) == 0 ? false : true ;
fgets (line, MAX_CLUE_LENGTH + 10, infile);