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Blog about programming and math

SPOJ Cookies Piles

Cookies Piles is simply sum of Arithmetic progression series.

import Data.List 


solve :: [Integer] -> String
solve xs = show $ div ( 2 * a * n + n * ( n - 1 ) * d )  2 where 
	     ( n : a : d : _ ) = xs 

main = interact $ unlines . map ( solve . map read . words ) . tail . lines
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May 16, 2011 - Posted by | Programming

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