3 ms·
See also the updated version at https://sites.google.com/site/prologsite/prolog-problems/ https://sites.google.com/site/prologsite/prolog-problems/.
by networked 12y ago
See also the updated version at https://sites.google.com/site/prologsite/prolog-problems/ https://sites.google.com/site/prologsite/prolog-problems/.