without creating reference variable of dp array — https://codeforces.net/contest/1271/submission/76026065 with creating reference variable of dp array — https://codeforces.net/contest/1271/submission/76032760

In one solution I am not creating reference variable ans inside rec function 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. Check rec function. Problem link : https://codeforces.net/contest/1271/problem/D