first reset and use op1 and op2 operations for (2*n+1) days, max possible score of n can be achieved. We are trying to get maximum score from initial array of size n by applying op1 in (say x days) and get score y by using (x+1) days. So maximum score from initial array can be n, and this score can be achieved by simply using first op1 and then op2 for (2*n+1) days, so checking beyond (2*n+1) days to get maximum score from initial array by applying op1 is not helpful!

Can you please explain your algorithm?