Enabled Ruby 3.0 & KaTeX used in this fork

You know what else is free too? --> Authoring katas on CW in any spoken language of your choice (The rules prohibit this but not the system ^^)

The whole design of this kata is flawed. Mixing different data type for expected output is a bad practice, let alone needing to explicitly handle the case when only 1 combination is found!

As of 21/1/2025, there are a total of 323 submissions, so revamp of tests to expect only an array of arrays / a list of lists can still be done with minimal tradeoff with all solutions being invalidated ! (This also adds the compatibility of the kata to be translated across strongly typed languages)

• If the function receives an empty array will output an specific alert:

  Why not just return [] for this case? Since an empty array literally represents nothing to process in the first place !!!

• If there are no combinations with sum equals to 0, the function will output an alerting message.

  Why not just return [[]] for this case ? Since an array consistng of only an empty array represents after processing the array, no combination was found

• Description does not mention we need to just return the first combination, not the entire array. Though the first example implies this, it is no where stated clearly in written words...

• OTOH, the explicit handling of 1 combination mentioned above increases the number of data types for the expected output -> an array. So, such requirement should not be there in the first place !

Enabled in this fork

Good feeling seeing my solution as the top solution lol

It simply means to find the unique combination with a size of m whereby m is the lowest frequency of an element in the array of digits.

Good exercise!

The random tests in Python have several issues:

• Lower bound of rows/columns of 2 instead of 10 per the description.
• Reference solution throws an error if no elements of the contour are within the range $[a,b]$, which is not a guaranteed property of the generated matrices.

memo rulezz!

Enabled in this fork

Enabled in this fork

kata was retired

Kata retired.

I think so too

Approved!