Great, that you found the problem and solved it! :-)

Merry christmas! ;-)

Could it be, that you are changing the input array?

I have exactly the same problem. Did you find a solution?

Update: This Kata is correct. I started changing the original input arr. When I created a new arr to incorporate the shifts my answers were correct.

Thank you for this Kata

Just noticed the spacing didn't keep for the addition part. Anyone know how I make it keep the formatting?

Something is wrong with the python version of the test. My script passes all the hard coded ones, but not the random. When I print the arrays and the shift and compare with the results, it looks like the expected answer is wrong. Here is an example:

[[3, 7], [-2, -5], [0, -1], [3, 2]] 1
[3, 5, -5, 2, 2] should equal [3, 7, -2, -5, 0, -1, 3, 2]

3, 7
-2,-5
0,-1
3, 2
3, 5,-5, 2, 2 <----------- This should be the correct answer, which is what I got, but it says it's wrong.