Can't understand logical flaw

#1

Most of the test cases are not working. Please check.

#2

@siddhu28.ss calculate your answer as ans=(ans*a)%c in case if ans increase limit.

#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.