There seems to be a very long queue in PKU Online Judge. No submissions were judged in the past 24 hours, and over 400 submissions are waiting. The last judge submission is submission 23160888, which happens to be my submission. What is going on and when will it be fixed?
It seems that there was a problem in compiling the submission #23160889 that caused the judger to go down.
By the way, POJ has not been updated since a long time ago(they are still using GCC 4.4.0, it doesn't even support C++11), and I don't know if anyone is still maintaining it...
Are there any other online judges that have the problems on poj.org? (or is it possible to get the official testcases manually for these problems?)
Hmmm... Maybe you can try submitting on http://bailian.openjudge.cn/practice/ (the UI is in Chinese, so try Google Translate). Many of the problems on POJ can be found here.
For the rest of the problems, http://vjudge.net is a good choice, you can try to search the title of the problem and find another online judge to submit. Note that many Chinese OJs are also unavailable(for example, HDU closed their OJ last week).
Also, you can find some test data through the source of the problems. Some problems are from earlier USACO contests, which you can find them here. Problems from the ICPC regionals in North America and Europe or University Championships can also be found on their websites (maybe the site isn't available anymore, so you should try to use WebArchive). However, for the problems from the POJ Monthly Contest, there may not be a way to submit them elsewhere.
The first link seems to have a lot of the problems on poj.org... Thank you!
Update: After about 3 weeks, it seems like the judge server was finally fixed and the queue is now empty. I really hope it doesn't happen again...