After my submission was rejudged (possibly due to cluster change), my accepted solution becomes "internal error". I tried to resubmit but it still gives internal error.
Judging by last few submissions, apparently I'm not the only one who encounter this problem spoj.com/status/HAJIME/
Edit: sorry, should be posted on bugs instead of wishlist. I don't know why "return to previous page" from login redirects me here