Recently I gave Codeforces round #660 (Div 2) ============================================= ,

where i solved problem B in O(n) time complexity After doing the problem in O(n) I still get TLE !!! and its not only me I get to know many other also faced this problem

EVEN C++ O(n) SUBMISSION GOT TLE !!!!!

My submission : http://codeforces.net/contest/1388/submission/88472454

A C++ Submission : https://codeforces.net/contest/1388/submission/88470034