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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.
The description needs to clear and concise, right now it is unnecessarily verbose, and despite of its verbosity it is not clear at all.
C
state is not explained anywhereDuplicate.
Bin to hex (and other similar conversions) were done already many times, in better quality (e.g this one); furthermore, they can be done with simple builtin functions; so there is nothing new here.
Input validation should be removed.
Could someone help me to fix test cases?
Sample tests: