結果
| 問題 |
No.405 ローマ数字の腕時計
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2019-04-10 18:22:46 |
| 言語 | Haskell (9.10.1) |
| 結果 |
AC
|
| 実行時間 | 2 ms / 2,000 ms |
| コード長 | 435 bytes |
| コンパイル時間 | 3,550 ms |
| コンパイル使用メモリ | 171,904 KB |
| 実行使用メモリ | 5,376 KB |
| 最終ジャッジ日時 | 2024-07-06 19:22:19 |
| 合計ジャッジ時間 | 2,266 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 27 |
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:15:34: 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."
|
15 | r = flip mod 12 $ (fst . head . filter f) roma + a
| ^^^^
[2 of 2] Linking a.out
ソースコード
roma :: [(Int, String)]
roma = zip [1..12] ["I","II","III","IIII","V","VI","VII","VIII","IX","X","XI","XII"]
main = do
[r, a] <- words <$> getLine
let
int_a = read a
putStrLn $ solve r int_a
solve :: String -> Int -> String
solve s a
| r <= 0 = snd $ roma !! (12 - r - 1)
| otherwise = snd $ roma !! (r - 1)
where
r = flip mod 12 $ (fst . head . filter f) roma + a
f x = s == snd x