Count subsequences doubt

#1

Hi,
Please give any hint.

#2

hello @vatsal50 havent you seen the editorial video for this ?
please see the code :


if you don’t understand anythihng in this question do let me know about that .
HAppy Learning !!

#3

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.