Submission #2243021

---

Source Code Expand

import Data.Maybe
import Data.List

main :: IO ()
main = do
  input <- getContents
  putStrLn $ trim (solve (trim input))

--処理
solve :: String -> String
solve s | x < 10    = show x
        | otherwise = "error"
 where
  [a, b] = fmap read (words s) :: [Int]
  x      = a + b

trimHead :: String -> String
trimHead = dropWhile (\s -> isJust (elemIndex s [' ', '\t', '\n', '\r']))

trim :: String -> String
trim = reverse . trimHead . reverse . trimHead

Submission Info

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