I don't know whats the problem

pleas check my current answer

The issue is that the dp array is not initialized, causing it to contain garbage values. Initialize dp with -1 to ensure memoization works correctly.

you can refer my code as well

I hope I’ve cleared your doubt. I ask you to please rate your experience here
Your feedback is very important. It helps us improve our platform and hence provide you
the learning experience you deserve.

On the off chance, you still have some questions or not find the answers satisfactory, you may reopen
the doubt.