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?
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?
Can anyone please provide an implementation of block-cut tree?