GET /cgi-bin/script.cgi?c%3D1%3Bu%3D1%3B...
  

##</code><code>##

  GET /cgi-bin/script.cgi?c=1;u=1;...
  

##</code><code>##

  use CGI ;
  my $query = new CGI;
  $cparam = $query->param('c');
  $uparam = $query->param('u');