The description is no longer available, and the URL with the data has been hijacked by a very questionable monetisation scheme. This problem should be either fixed or deleted.
A link update to wayback was added for the rules.
I'm sorry if this is a challenging problem that requires more than a single line.
please remove this question
Knight's Tour Checker
Decode a simplified barcode
Getting the indices from a matrix
Make a Pandiagonal Prime Magic Square: 11 x 11
Solve Quadratic : No * - or key functions permitted
Unique - Very Very Large Numbers
Usage of mkdir and copyfile
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