Got it thank you;-)

you can't, because it has no length. re-read the Remarks portion of the description

Thanks

Thanks

Please post the tests(on which you think there is an issue) here.

There is no issue with the tests, because:

[2, 2, 0, 0, 0, 1, 2]
[1, 1, 1, 0, 0, 2, 1]
[1, 1, 1, 2, 0, 1, 2]
[1, 2, 2, 2, 0, 1, 2]
[2, 2, 1, 2, 2, 2, 1]
[1, 1, 2, 2, 1, 2, 1]

Where 2 is yellow, see the 4th column.

It is red, here is how:
B0 - red, C0 - red, D0 - red, E0-red
subscript 0 implies ground/first row from bottom.

PLease look into it

Hi,

All outputs are correct, I can assure you. ;)
Use pen and paper to simulate the board, you'll see.

Note: "issues", on CW are reserved for dysfunctionning katas/wrong tests/... Open one only when you can actually prove that you're facing one of those. Here, you didn't prove the expected result is incorrect (and I can assure you it is correct), hence, use the "Question" instead.

cheers