Which online judges have problems sorted by category?

Revision en1, by Wildebeest, 2018-07-27 20:46:53

I know codeforces, timus, uva (to some extent), codechef, lightoj have option to sort problems by categories/tags. Any other online judges with this feature, like HDU, POJ etc?


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en1 English Wildebeest 2018-07-27 20:46:53 229 Initial revision (published)