結果
| 問題 | No.518 ローマ数字の和 |
| コンテスト | |
| ユーザー |
aimy
|
| 提出日時 | 2017-05-29 22:37:21 |
| 言語 | Haskell (9.10.1) |
| 結果 |
AC
|
| 実行時間 | 2 ms / 2,000 ms |
| コード長 | 1,089 bytes |
| コンパイル時間 | 3,210 ms |
| コンパイル使用メモリ | 173,312 KB |
| 実行使用メモリ | 6,944 KB |
| 最終ジャッジ日時 | 2024-09-21 18:12:43 |
| 合計ジャッジ時間 | 4,063 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 19 |
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 ) [2 of 2] Linking a.out
ソースコード
import Data.Char
main = do
getLine
rs <- words <$> getLine
putStrLn $ maybe "ERROR" id $ roman $ sum $ map arabic rs
roman n
| n > 3999 = Nothing
| otherwise = Just $ concat $ zipWith readArabic [1000,100,10,1] (digits n)
where
digits = reverse . take 4 . reverse . ([0,0,0] ++) . map digitToInt . show
readArabic 1000 d
| d == 0 = ""
| otherwise = replicate d 'M'
readArabic 100 d
| d == 0 = ""
| d <= 3 = replicate d 'C'
| d == 4 = "CD"
| d == 5 = "D"
| d <= 8 = 'D' : replicate (d-5) 'C'
| d == 9 = "CM"
readArabic 10 d
| d == 0 = ""
| d <= 3 = replicate d 'X'
| d == 4 = "XL"
| d == 5 = "L"
| d <= 8 = 'L' : replicate (d-5) 'X'
| d == 9 = "XC"
readArabic 1 d
| d == 0 = ""
| d <= 3 = replicate d 'I'
| d == 4 = "IV"
| d == 5 = "V"
| d <= 8 = 'V' : replicate (d-5) 'I'
| d == 9 = "IX"
arabic = sum . count . map readRoman
where
readRoman r = case r of {'I'->1; 'V'->5; 'X'->10; 'L'->50; 'C'->100; 'D'->500; 'M'->1000}
count (x:y:xys) = if x<y then y-x : count xys else x : count (y:xys)
count xs = xs
aimy