Reference implementation / guide to solving the Vertica Dev Xmas 2019 december challenge - posted on https://blog.vertica.dk/category/dev-xmas-2019-julekalender/
All examples are created using LINQPad. Code can easily be copied to Visual Studio, Rider or other IDE of your particular flavour. Any 3rd-party NuGet reference is described in XML, in the top-part of each file. Enjoy.