i get the concept. . number of '' in each level == (2n - 1).
so i created seperate variable for each
let space = " ";
let astrise = ""

but don't know how to build Tower.

But now you pass:-)

I am getting the same error.
whether

return std::pair<long long, long long>{0,0}

or

std::pair<long long, long long> answer(0,0);
return answer;

both method also does not work and keep giving unsupported type

I have compiled the code in an online compiler and there is no problems with my code.

UPDATE:
my bad, it turns out that an error with the code can also trigger an unsupported type response.

Hi @akshat1010, there are preliminary tests known as 'Sample Tests' or 'Example Tests'. But that's not all you need to pass the kata. There are additional fixed tests when you click ATTEMPT, along with even more random tests.