I was participating in the Educational Round the other day. I was trying 915E. I submitted this code but ended up with an RTE on the very first case. Whereas this code doesn't cause any problem on various online IDEs, I am getting RTE on Codeforces. So I debugged a while and ended up with this code. From what I see, its not inputting just after one iteration.

I am all lost here. Anything on this will be so much of help right now! Thanks in advance.