In Round 405 Div.2 I was trying to solve this problem, I ran the code on Ideone and was getting right answers for all the given test case but when I submitted the solution it gave me WA on pretest 1. (Pretest 1 being the same test case on which it was giving correct answer on Ideone.) It cost me around 30 minutes and some mental trauma because I couldn't figure out what was wrong with my solution.
my submission : 25607066
I DON'T KNOW WHY IDEONE IS GIVING WRONG ANSWER
BUT CF,MY LOCAL COMPILER,CODECHEF IDE GIVES SAME RESULT ACCORDING TO WHICH YOU HAVE WA.
Please don't use all uppercase letters. It makes it seem like you are shouting.