It's all about functionality.
Cheating is allowed but not required
Distance walked 3D
Back to basics 15 - classes
Replace all zeros and NaNs in a matrix with the string 'error'
Make a 1 hot vector
Reference Index Number
Back to the future
Clear functions with the same name in different packages independently
Become the leader
Obtain the Bitcoin address associated to a given private key
Back to the Future III
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