the name of the producer column should be "producer" instead of "producent"

"producent" should probably be spelled "producer"

just keep in mind that producent coulmns can contain values like "CompanyA", "CompanyB" etc which u might want to use in your solution

Despite the condition being 2 or less in stock, "stock < 2" also passes the tests

It is great challange, love it, just not very clear what is expected until I have run it first time. I would suggst to state using LENGHT fuction is not allowed - just for a clarity.

Input: 7 9 15

Output:
7, 63, 567, 5103, 45927, 413343, 3720087, 33480783, 301327047, 2711943423, 24407490807, 219667417263, 1977006755367, 17793060798303, 160137547184727

Stack trace:
expected:<...3480783, 301327047, [-1583023873, -1362312969, 624085167, 1321799207, -988709025, -308446633]> but was:<...3480783, 301327047, [2711943423, 24407490807, 219667417263, 1977006755367, 17793060798303, 160137547184727]>

Negative numbers here means Integer overflow

Description should be language-agnostic

Kotlin random tests seem to contain Integer overflows in their expectations, causing valid solution to fail.

Description should be language-agnostic

Please review the description. It was very good until it missed some relevant details, such as requiring the output of the "price_per_kg" column to be converted to float. Otherwise, I liked the challenge.

The results in the price_per_kg column are not checked. I have applied some incorrect formulas to count values of this column, and these solutions passed all the tests.

The description requires to count different type of products which will requires to use distinct, but for the result showing that we should not use it.Either you should change the description or change the test case