program ask15(input,output);
  type  nodetype=record
                  info:integer;
                  next:^nodetype;
                 end;
  var  head,node,nodethet,nodearn,headthet,headarn :^nodetype;data:integer;

  begin
  writeln('Dose osous akeraious ari8mous 8eleis eite 8etikous eite arnhtikous kai meta patise <enter>:');
  head:=nil;read(data);
  while not eoln do
   begin
   new(node);node^.info:=data;node^.next:=head;
   head:=node;read(data)
   end;
   if (node^.info>0) then
    begin
    headthet:=nil;
    new(nodethet);nodethet^.info:=node^.info;nodethet^.next:=headthet;headthet:=nodethet;
    end
   else if (node^.info<0) then
    begin
    headarn:=nil;
    new(nodearn);nodearn^.info:=node^.info;nodearn^.next:=headarn;headarn:=nodearn;
    end;
   end.