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can creating reference variable or not of DP array ,make difference ??  
Difference between en1 and en2, changed 88 character(s)
without creating reference variable of dp array —
with creating reference variable of dp array   —     https://

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 :


  Rev. Lang. By When Δ Comment
en4 English mdazmat9 2020-04-09 22:55:50 41
en3 English mdazmat9 2020-04-09 22:53:18 41
en2 English mdazmat9 2020-04-09 22:50:44 88
en1 English mdazmat9 2020-04-09 22:45:10 527 Initial revision (published)