I have been solving this problem https://codeforces.com/contest/339/submission/129086329 but while on test case 7(a very long test case) , I get this error saying 'the solution is executed with error out of bounds or other memory error' on line 18'. Codeforces is new for me, so could you tell me what is wrong with my code and how should I fix it? It would mean a lot.

Thanks