You're right. The returning type was incorrect.

I've implemented my solution in F#, but when I go ahead and test it, the following error appears:

/home/codewarrior/program.fsx(32,48): error FS0001: This expression was expected to have type
'int * int * int'
but here has type
''a list'

Translation complete.

This does not scale well. Have you tried any n greater than 1,000,000?
Besides, your for loop should start with int i = 3 obviously because this is the first divisible number by 3.

I've just fixed the error messages. I am now asserting the IDictionary.Keys and IDictionary.Values collections separately.

• The helper method is Preload.Utils.Normalize(string);
• 3 random tests are now being applied to the solutions besides the example test case;
• This kata exercises the use of contracts as opposed to state handling. The developer has to operate over histogramBin in order to complete the problem. Counting is just a pretext to work on the contract itself.

Thank you for your reply!
The bug has been fixed. Please call Preloaded.Utils.Normalize(string).

I've just replaced some otherwise ambiguous plurals with the suggested es ending, like boxes, waitresses etc., which require just removal of the es to make it into singular form.

The kata description was updated, too, clarifying the situation.

This kata is intended for beginners.

Thank you, I've just fixed the Sample Test.

Indeed, 33, 35, and 42 are struck-through, so they are not being taken into account.