結果
問題 |
No.406 鴨等間隔の法則
|
ユーザー |
![]() |
提出日時 | 2019-08-23 18:20:58 |
言語 | Haskell (9.10.1) |
結果 |
AC
|
実行時間 | 157 ms / 2,000 ms |
コード長 | 782 bytes |
コンパイル時間 | 8,326 ms |
コンパイル使用メモリ | 180,780 KB |
実行使用メモリ | 21,888 KB |
最終ジャッジ日時 | 2024-07-07 13:07:50 |
合計ジャッジ時間 | 8,514 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 29 |
コンパイルメッセージ
Loaded package environment from /home/judge/.ghc/x86_64-linux-9.8.2/environments/default [1 of 2] Compiling Main ( Main.hs, Main.o ) Main.hs:23:57: warning: [GHC-63394] [-Wx-partial] In the use of ‘head’ (imported from Prelude, but defined in GHC.List): "This is a partial function, it throws an error on empty lists. Use pattern matching or Data.List.uncons instead. Consider refactoring to use Data.List.NonEmpty." | 23 | solve xs = if any (== 0) xss then "NO" else if all (== (head xss)) xss then "YES" else "NO" | ^^^^ [2 of 2] Linking a.out
ソースコード
import Control.Applicative ((<$>)) import Data.Char (isSpace) import Data.List (unfoldr, sort) import Data.ByteString.Char8 (ByteString) import qualified Data.ByteString.Char8 as B getL :: (ByteString -> [Int]) -> IO [Int] getL f = f <$> B.getLine readIL :: (ByteString -> Maybe (Int, ByteString)) -> (ByteString -> [Int]) readIL f = unfoldr g where g s = do (n, s') <- f s return (n, B.dropWhile isSpace s') main :: IO () main = do B.getLine putStrLn =<< solve <$> getL (readIL B.readInt) solve :: [Int] -> String solve xs = if any (== 0) xss then "NO" else if all (== (head xss)) xss then "YES" else "NO" where xss = f $ sort xs f :: [Int] -> [Int] f [x] = [] f (x:y:ys) = (y - x) : f (y:ys)