jeneshicc https://blog.hatena.ne.jp/jeneshicc/ 落書き、時々落学 https://jeneshicc.hatenadiary.org/ Project Euler Haskell http://projecteuler.net/index.php?section=problems&id=156 import Data.Char import Data.List count :: Int -> [Int] -> Integer count d = genericLength.filter(==d) listToInt :: [Int] -> Integer listToInt = foldl' add 0 where add a b = a*10+toInteger b intToList,intToList' :: Integer -> [Int] intToList … 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fjeneshicc.hatenadiary.org%2Fentry%2F20081223%2F1230043747" title="Problem 156 - 落書き、時々落学" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2008-12-23 23:49:07 rich https://jeneshicc.hatenadiary.org/entry/20081223/1230043747 1.0 100%