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.
Fixed.
kata isn't editable anymore, unfortunately. Closing.
It could be 3. Or 4. Or 5. Or {6,7,8,9}
Gah... I didn't notice that as well
If it's not ready, show the actual issues. After all, your issue might be in a specific language, which was added after the beta process.
You can always see what expr you are validating by adding System.out.println
I thought that at first, but then realised that answer is disallowed by the statement "All of the ?s in an expression will represent the same digit (0-9), and it won't be one of the other given digits in the expression".
Same thing with the python version. Worked fine until it suddenly couldn't find the Node class...