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.
Everything sounds fine, I think you're mutating the input.
Please post your code here (with spoiler).
C#. But I just checked and the reference solution seems to find 2 valid smileys too. Expected and actual are'nt swapped, tho (afaik...).which language?