Loading collection data...
Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
To clarify, the tests expect the solution to open System even if the solution itself does not require it. The tests can use F#'s int64 built-in alias for Int64 or open System.
I don't understand your question:-(
What about built-in int64 type for tests?
I think it is the Codewarrior who has to
open System. It is a part of the job, no?