Find the largest value in the 3D matrix
intersection of matrices
Generate a vector like 1,2,2,3,3,3,4,4,4,4
Create an n-by-n null matrix and fill with ones certain positions
Find out sum of all elements of given Matrix
Remove the polynomials that have positive real elements of their roots.
Get the area codes from a list of phone numbers
Find relatively common elements in matrix rows
Alphabetize by last name
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