Project Euler Problem #28

March 2, 2009

(This article was first published on The Research Kitchen Weblog » R, and kindly contributed to R-bloggers)

Problem 28 on the Project Euler website asks what is the sum of both diagonals in a 1001×1001 clockwise spiral. This was an interesting one: the relationship between the numbers on the diagonals is easy to deduce, but expressing it succinctly in R took a little bit of tweaking. I’m sure it could be compressed […]

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