without creating reference variable of dp array — https://ideone.com/SquMtZ with creating reference variable of dp array — https://ideone.com/ubpfJ5

In one solution I am not creating reference variable ans and solving normally gave WA while making reference variable gave AC .I am unable to find error in my both code rest parts are exactly same .Please look into it. Problem link : https://codeforces.net/contest/1271/problem/D