I understood. Thank you.

At first it seemed illogical to me, since if the personal is constantly visible (it doesn't matter if there is light or not) then we will 100% return his window.

1B has been sight at some point, but not during the entire night.

At least two neighbouring apartments of A toggled lights four or more times during the night, while the occupant of apartment A wasn't consistently in sight that night.

Block: 
[[0, 0, 0], [0, 3, 0], [0, 0, 0]],

Observations: 
[['1A', 1], ['1A', 0], ['1A', 1], ['1A', 0], ['1B', 3], ['2B', 0], ['2B', 1], ['2B', 0], ['2B', 1]]

Switches 1A and 2B 4 times. And the answer should be: [ '1B', '2A' ] BUT in "observations" there is ['1B', 3]. That is, a person appeared in the window(with a light). He shouldn't be in the answer. The answer should be:[ '2A' ].

Did I misunderstand something? Or is there a problem with my solution?

Брат. Поддержка💪💪
Я такой же.

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