Help me in solving STRMCQ3 problem

My issue

how BBAA is valid for the same score because in first chance b won and doesnt get any score and then become server and won in just next chance got +1 and A is server and got +1 and next chance as same as previous so how +1 and +2 are equal?

Learning course: Strings using C++
Problem Link: CodeChef: Practical coding for everyone

@ananyajain4920
the rules are if the server scores a point and he will get 1 score and if receiver scores a point he will become server and server will become receiver .
and it is given that initially A is server .
now for “BBAA”
first B scores , which means B will become server and A will become receiver . → A=0,B=0.
then B scores again which means B will get 1 score.->A=0,B=1;
then A scores , which means A will become server and B will become receiver .-> A=0,B=1
then A scores again which means A will get 1 score . → A=1,B=1;
so at the end they will have same score.