Problem 2
http://projecteuler.net/index.php?section=problems&id=2
--Haskell, 20090104 import Sequence (fibonacci) main = print $ sum [x | x<-takeWhile (<=4000000) fibonacci, even x]
数列モジュールを使用.
http://projecteuler.net/index.php?section=problems&id=2
--Haskell, 20090104 import Sequence (fibonacci) main = print $ sum [x | x<-takeWhile (<=4000000) fibonacci, even x]
数列モジュールを使用.