That's what happens when your code segfaults on Codewars

There is no need for caching...

When I run test suite I get Passed:0 Failed:0 and sumAnn_tests passed. Test runs sumAnn with parameter n up to 100000. Other tests don't execute. This behaviour appeared when I began cashing results of functions john(long long n) and ann(long long n) in static members of Johnann class. Example tests runs well.
Before cashing I couldn't pass tests because low perfomance of my algorythm.
My code in the below message.

Found a bug in my code and fixed it and then all tests passed successfully.
Thanks for reply.

Did you read a post below:

So it turned out in my case above, the error was the result of a failing test, but it appears the test harness doesn't know how to handle std::pair<>, hence the 'unsupported type' message. Once I fixed the bug in my code, the 'unsupported type' errors went away.

I don't know why but the C++ Unit tests returns "Unsupported type" when your test fails.
Print the input and your results and you will see that they are wrong hence the "unsupported type". Your solution doesn't pass the first fixed test. Sorry but I am not the C++ Unit tests writer:-(

Have troubles with an [Unsupported type] C++

I had the same problem using C++