Hi all,

My solution to problem http://codeforces.com/contest/688/problem/D

gave RuntimeError when i took array input before and then processed.

But the same code gave AC when I processed simultaenously while taking input.

I have no idea why the first code gave runtime error :(

RUNTIME ERROR CODE- http://codeforces.com/contest/688/submission/18818380

AC CODE — http://codeforces.com/contest/688/submission/18818424

Thank you :))