Incorrect initial name of the function for the F# example. The suggested name is "word_pattern", although the test is trying to run a function with a name "wordPattern".

Yes, it's F#

The arguments are passed to the tests incorrectly. I had a wrong order of the elements concatenation and actually returned the highest value. But the test output was the following:

[4;7;5;7]=457
Expected: 754
Actual: 457

as though I have a correct result ("Actual" is 457), but the test in fact expects the maximum value. There should have been the following output:

[4;7;5;7]=457
Expected: 457
Actual: 754

The descriptions is incorrect and confusing, as many people stated below.

I have just noticed that I fogrot to sort the output. However, all the tests have passed.