If you 'have tried everything' then maybe you can share your results with us.
Using old-school paper and pencil can help to understand logic (customer number in parentheses)
A 0 1 2 3 4 -> (1)A0, (2)A1, (3)A2, (4)A3, (5)A4
B 0 1 2 3 4 -> (6)B0, (7)B1, (8)B2, (9)B3, (10)B4
/../
I think you can spot the pattern. You should ask yourself: what should I do to get from 7 (customer number) B1 (block and floor).
Using old-school paper and pencil can help to understand logic (customer number in parentheses)
A 0 1 2 3 4 -> (1)A0, (2)A1, (3)A2, (4)A3, (5)A4
B 0 1 2 3 4 -> (6)B0, (7)B1, (8)B2, (9)B3, (10)B4
/../
I think you can spot the pattern. You should ask yourself: what should I do to get from 7 (customer number) B1 (block and floor).
I'm not 'in'-sane. Indeed, I am so far 'out' of sane that you appear a tiny blip on the distant coast of sanity. Bucky Katt, Get Fuzzy
Da Bishop: There's a dead bishop on the landing. I don't know who keeps bringing them in here. ....but society is to blame.
Da Bishop: There's a dead bishop on the landing. I don't know who keeps bringing them in here. ....but society is to blame.