As it seems I have a similar problem in Bulgaria. I have solution for challenge 6/7 Traversal, but it takes just a bit over the required 4 seconds to solve it 2 consecutive times. I'm sure my solution is corect (the first time I receive "Good!" reply and the secong "Too slow!", not "Wrong"). When I measured the run time of my prog, it was between 4 and 5 sec, the shortest was 4235 milliseconds. I know GetTickCount() is not very precise, but for sure the part of my program, which does the actual computation takes only about milisecond.
I think that I lose much time retreiving the data from the site; iti is obvious that my access is not fast enough even when I open the pages of rankk.org in web-browser. So, I have to contact my ISP, because tracert showed some packets have been dropped out.
I need only half a second!
Galen