Recently I posted several blogs and comments.I usually get upvotes,and my contribution is +9 a few hours ago.However,it now shows my contribution is 0.I didn't have any downvotes and I'm curious about this problem.

By the way,last bug I found was fixed(or my computer is broken):)

Recently I participated in Educational Codeforces Round 70 (Rated for Div. 2).When I opened the problems,I found them really hard.It can be shown in the contest result:I only solve 1 problem,and I ranked 2797.However,1 problem cannot get such a high ranking in other contests.What do you think of this contest?

The day before yesterday I registered the account.However,just now I found an unbelievable thing like . Is this a bug or a feature?