is two pointer mean u need to use 2 pointers or its simillar like sliding windows ?

im kinda confused since i often see two pointers tag

I am a leaner and just now trying to solve problem 230 A . i got rte and i thought my array wasnt big enough but it wasnt the case . can someone help me find the bug ? or MLE is included as rte in codeforce ??

my code is in this link : http://ideone.com/82YKlw

the problem link : http://codeforces.com/problemset/problem/230/A