Started at first floor
went up 18 floors, so now we are at 1+18 or 19th floor
then cam down 11 floors, so now we are at 19-11 or 8th floor
then went up 16, so now at 16+8 or 24th floor
it stopped at 24th floor
Answer:
I think the answer is -1
Step-by-step explanation:
the sequence goes i, -i, 1, -1
Right? >_>
