Actually, the thing is that, I've got mail on my 2 IDs, but the thing is both IDs are mine only, inadvertently I wrote the solution on my compiler and paste it on this id (this is my alternate id), and this solution got accepted, so wrote the same solution on my main ID too, It was just a mistake, if it's considerable then I can give you the proof that both IDs are mine only.

I had opened two ID's because, in the beginning of the contest, the problems were not opening in my main ID, it was buffering again and again, so I tried in my alt ID and it got opened after a while, so I had to read the problems asap, so that the time could be saved.