Get the area codes from a list of phone numbers
Given an unsigned integer x, find the largest y by rearranging the bits in x
Getting the indices from a vector
02 - Vector Variables 3
Back to basics 8 - Matrix Diagonals
Back to basics 9 - Indexed References
Back to basics 21 - Matrix replicating
Back to basics 24 - Symbolic variables
Back to basics 11 - Max Integer
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