sooop/pentagonal.hs

Last active September 20, 2017 11:43

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5각수 구하기 - 하스켈 (https://www.hackerrank.com/challenges/pentagonal-numbers/problem)

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pentagonal.hs

	pen n = (flip div 2) $ n * (n * 3 - 1)
	main = getLine >> getContents >>= putStrLn . unlines . map (show . pen .read) . lines

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