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<b_jonas> chmod a+x bin/8ball && cp bin/8{,-}ball
author HackBot
date Tue, 15 Apr 2014 10:21:51 +0000
parents 7f957c1f4661
children
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import Data.List(inits);main = let p = 1 : zipWith (+) (map (*4) p) (map (sum . zipWith (*) p . reverse) (inits p)) in print $ p !! 1000