It seems easy, but...
You cannot use +, -, plus, diff, cumsum, *, prod, times, etc.
conv([x y],[1 1],'valid') will not work as it contains STRINGS !!
Very witty solution.
surface of a spherical planet
Find the sum of the elements in the "second" diagonal
System of equations
Given a window, how many subsets of a vector sum positive
frame of the matrix
Compound interest - number e
Create an n-by-n null matrix and fill with ones certain positions
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