Scala Sample Test / Type Mismatch Error

If the numbers within the Seq() do not contain the L to state the numbers are long. Then the compiler will throw a Type Mismatch Error. Therefore you have to can bypass the sample tests by submitting. Or you can change sample test by adding the L

Example:
(Seq(9L), 9L),
(Seq(6L, 9L, 21L), 9L),
(Seq(1L, 21L, 55L), 3L)

as rowcased said, your code contains undefined behavior. you are accessing the vector past its last element. one property of undefined behavior is that it can cause code to work in one setting (your computer) and not in another (Codewars). this is not a kata issue, but a problem with your code.

It seems strange, because on my VS Code with compiler gcc 8.3.0 i have correct answer for {4,16,24} and {30,12}

I am not even sure this is possible, but it appears that, during a particular test, using arr[i+1] within a loop based on i < arr.size() you end up causing UB by altering the elements of the following test's arr1?

actual refers to the value your code returns to the testing suite

so, your code is returning 4 for that test, whereas it should return 12 for that test

I have the problem with basic tests. In results actual value is 4, but 4 is not in tests.

I meant O(n log(n)). And considering the number of people complaining about timeouts, they wrote a O(n^2) one.

You didn't write a O(log n) solution.

Problems like these have nothing to do with coding skills. If you know the algo, you can do it, otherwise you'll keep staring at it for a week and still get nowhere.

And has nothing to do with coding skills.

Perhaps a better approach would be to give the user a framework to run all the tests locally, so that they can debug failed tests using something better than printing to stdout.

Lua translation!

Brilliant coding challenge...

Hhahaha what the evil author, the description is completely misleading