i submitted 177D1 - Encrypting Messages for contest ABBYY Cup 2.0 - Easy and 178B1 - Greedy Merchants for ABBYY Cup 2.0 - Hard. i think there must be something wrong with the judge, cause it gives AC, 0s, 0kb. i even submitted a wrong code and it gives AC.
it seems that the problem is being fixed. 1649987 "I wrote this when the problem was not resolved".