firstly during the contest Cypher september codechef servers were not working properly ( pages not loading , IDE not working , etc)
many guys who had participated in the contest may have experienced the same.
personally this was my third time I have faced this kind of problem on codechef recently.
Apart from this there was a question Danny and the Square Difference in which only the problem setter(cypher101) got an AC
did this mean that all other participants code was wrong , Absolutely not.
Infact problem setters code was wrong which got an AC . yeah that means during contest the question was being judged wrongly which may have affected many users in different ways.
I personally was victim of the situation I submitted the code 4 times yet I got only WA
@admin @vijju plz see into the matter and make sure these kind of mistakes should not repeat in near future : )
#proof setters code was wrong :-
roughly speaking , In the problem we have to find numbers which can be written as a^2 - b^2 . and we know that 3 (2^2-1^2) should be counted among these numbers but in his solution he straight forwardly ignored 3 as he counted numbers greater than 4 (n > 4) which was the main reason of all Wrong answers