Argh! The 'mod sorting' has me flummoxed!
Cheated. So ashamed...
Extract leading non-zero digit
the fly, the train, the second train, and their Zeno's paradox
Back to basics 19 - character types
Sum of diagonal of a square matrix
What day is it?
Exact binary matrix factorization
Elapsed time is -0.005204 seconds.
Path of least resistance
Find the longest match inside two strings
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