As a heads up, http://oeis.org/A138591 counts 1 as a polite number, but the test suite does not.
Find the longest sequence of 1's in a binary sequence.
Least common multiple of many numbers
Back to basics 15 - classes
Getting the row and column location from a matrix
Packing oranges - one layer
How many solutions has this problem?
Pancakes for everyone!
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