Additional test cases have been added.
This problem needs more tests. For instance, x = [1 10 3 0 2 4 0 8 -9 1] is a case with a non-positive difference, but a maximum change, which would make many solutions fail.
Return the 3n+1 sequence for n
Remove the small words from a list of words.
Is A the inverse of B?
Getting the absolute index from a matrix
CONVERT TAN TO SIN
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