Replace NaNs with the number that appears to its left in the row.
Back to basics 20 - singleton dimensions
Back to basics 23 - Triangular matrix
Rotate input square matrix 90 degrees CCW without rot90
Find the area of a triangle
Who Has the Most Change?
Return the 3n+1 sequence for n
Determine if input is odd
Remove all the words that end with "ain"
Select every other element of a vector
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