Similar to, though simpler than, James's decimation problem: https://www.mathworks.com/matlabcentral/cody/problems/1092-decimation.
Select every other element of a vector
Sum of first n terms of a harmonic progression
Replace Vector Elements
Given a window, how many subsets of a vector sum positive
Max of a Vector
How many rectangles in a grid ?
length of string on cylinder
rectangle in circle
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