This solution has a time complexity of O(n) which makes it the most efficient for larger data sets.

can anyone explain that to me ?

No, it was my bad. Everything okay.

I think i did it right but got this error.
Response received but no data was written to STDOUT or STDERR.

added

No sample tests.

!

The kata is semi-broken in that attempting to submit always runs a console.log, which uses .call, which means… if you don't have the solution, you cannot debug it at all. HOWEVER, when you do get the solution, it does work, because console.log now works and you are able to submit.

So, the kata is actually functional — just annoying.

Because the Kata has to disable the Function.prototype.call, the whole Kata framework is going to crash until you re-implement that correctly.

In particular, none of the Test methods will work unless call works correctly.

The CodeWars framework internally uses call so if your implementation isn't correct, nothing will work.

Note that even if you haven't used console.log, all of the tests log something. It's internally using the same framework.

This Kata is broken.

Thank you for the answer, but still don't understand. Personally I don't use log function in my code. And any call to call function handels by my custom Function.prototype.call.

The kata description contains a message saying that console.log internally uses Function.prototype.call, so it looks like log may have been disabled for this kata.