What's wrong with my solution?

Question

I pass 4 cases but 1 case doesn't pass and it doesn't allow me to see the case.but i think my code must work.
https://code.sololearn.com/c8t9Rv322oDR/?ref=app

Answer 1

In line 10 no need to extend. Just use pp<cc

Answer 2

AKR thank you so much🙏

Answer 3

AKR here is the code