Matthias

I see. I think this is a first attempt at creating concepts and concept exercises. I agree that `std::ostringstream` should be preferred in general.

> If we want to enforce the use of enum / enum class, then we would have to add even more code to the tester, since StringMaker only changes how...

PR #544 fixes that by avoiding level-1 headings and adding the prefix "h-" to the URLs of the links.

Hej @rajatnai49, I'm a little bit torn. The example solution still contains a lot of "human reasoning", e.g. why the first house is yellow is deduced from facts 6, 15,...

> Sorry @siebenschlaefer for disappointment😞 No worries, please! As vaeng [wrote earlier](https://github.com/exercism/cpp/issues/779#issuecomment-1913264259) this is not an easy exercise. And maybe we maintainer should have communicated more clearly what kind of...

@rajatnai49 Are you still working on this? Is there anything we can do to help you?

Much better, this is now an algorithmic solution. --- But it takes a really long time to run because it tries all potential solutions and finds the correct solution after...

> We could also go the class way and generate the puzzle solution on construction and have the answers in variables ... Might be ugly :D Right, that's another option....

We discussed the order shortly in issue #740 but did not follow up on that.

Currently the C++ track uses C++17 because C++20 might not be available on some LTS Linux releases. When we get to a point where we switch to C++20 and `std::format`...