Thanks for the tip and the interesting kata! I've worked on this off and on for the last few weeks and it feels good to finally solve it :)

Thanks for taking a look. It passes the sample tests in 0.026472ms but now I get the 12 second duration error message. Is my algorithm still too slow?

I'm using C# and I have a solution that passes the example tests. However when I attempt the kata it says there were three compilation warnings like:

/home/codewarrior/fixture.cs(48,6): warning CS0162: Unreachable code detected

Any idea what would cause this? I am using a second function and I have included a second "using" at the top. All of the code is reachable (as I said it passes the example tests just fine) but I don't know exactly how it is run on the server. Is there something I need to watch out for when working with C# on codewars.com?