Given n balls of radius r and the vector p (nx3) with all position (x,y,z) of the balls, return the symmetric matrix A (nxn) containing all distance between the centroid of all balls (diagonal terms should be all 0).
Two or more balls can overlap.
Perhaps the "default" solution should not be the one actually solving the problem?
I think there is some rounding difference here... :-(
"Low : High - Low : High - Turn around " -- Create a subindices vector
Multiply a column by a row
How many trades represent all the profit?
Center of mass
Inverse of Hilbert matrix
subtract central cross
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