Not related to WA5, but to WA4 - perhaps it helps anyway:
I got wa4 when forgot to add the advantage of each apartment, to the total value, before comparing to current max.

I got WA5. But I have passed it.
My error was in copypast. When I was comparing current maximum, I used wrong massive. I want to calculate maximum living along in 2 bedroom apartment massive , but I took values from one bedroom apartment massive :(

Try this:
1 0 0
0
1
2 1 1