Wildcard pattern matching

#1

can you plz help me in thinking an approach for this problem!!!

#2

Hello @Bhavya_Goel
since u are facing difficulty in dp problems ,i would suggest to watch dp playlist again and again.
use pen and paper to dry run code ,understand approach .after watching each video try coding on ur own . after doing this sufficient number of times u can start doing assignment.

#3

for this problem u can take help of this article.