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].
Find state names that end with the letter A
Scoring for oriented dominoes
Too Many Zeros, Dump Them!
A matrix of extroverts
GJam 2013 China Event: Happy Teams
REPMAT Enhancement - Faster for Large Row Replication of Vector
Cody Matlab Version
Usage of varargout
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