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Veky style solution in Creative category for The Rows of Cakes by nickie
checkio=lambda c:sum(len(r)>2 for r in set(frozenset((Z,z)for Z,z in c if(Y-X)*
(z-x)==(y-x)*(Z-X))for(X,x),(Y,y)in __import__("itertools").combinations(c,2)))
Feb. 8, 2014
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