I think that with this kind of problem, you can process in two steps.
A first easy problem with small N (to test perms for example). And a harder problem with big N, which
oblige to find another algorithm.
surface of a spherical planet
Column norms of a matrix
Multiply a column by a row
Implement a bubble sort technique and output the number of swaps required
frame of the matrix
Numbered lottery balls into cells
Return elements unique to either input
Go to the head of the class!
Accessing values in a cell
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