I am sure there are other more subtle ways to go about it but this seems about as fast as I can make it for a general brute-force solution (0.11s)
This one seems to work for the large test case, too, although it is not a general solution [for size(p,1)>100 it only tests corner points].
The Goldbach Conjecture
Wind outward from the center ...
Compute a dot product of two vectors x and y
Set a diagonal
Knots Contest: Score (ContestSuite)
String Find with Wildcards of a Cell array
USC Fall 2012 ACM: Martian Pranks
Packing Santa's Sleigh: First Layer
USC Fall 2012 ACM : Find Largest Water Concentration
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