結果
| 問題 |
No.518 ローマ数字の和
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2017-05-31 18:25:30 |
| 言語 | Haskell (9.10.1) |
| 結果 |
AC
|
| 実行時間 | 2 ms / 2,000 ms |
| コード長 | 1,677 bytes |
| コンパイル時間 | 2,942 ms |
| コンパイル使用メモリ | 169,728 KB |
| 実行使用メモリ | 5,376 KB |
| 最終ジャッジ日時 | 2024-09-21 20:25:32 |
| 合計ジャッジ時間 | 2,371 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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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
toNum ns = iter 0 "" (reverse ns)
where
iter x _ [] = x
iter x s (n:ns)
| n == 'V' = iter (x + 5) "V" ns
| n == 'L' = iter (x + 50) "L" ns
| n == 'D' = iter (x + 500) "D" ns
| n == 'M' = iter (x + 1000) "M" ns
| n == 'I' = case s of { "V" -> iter (x - 1) "" ns; "X" -> iter (x - 1) "" ns; _ -> iter (x + 1) "" ns; }
| n == 'X' = case s of { "L" -> iter (x - 10) "" ns; "C" -> iter (x - 10) "" ns; _ -> iter (x + 10) "X" ns; }
| n == 'C' = case s of { "D" -> iter (x - 100) "" ns; "M" -> iter (x - 100) "" ns; _ -> iter (x + 100) "C" ns; }
| otherwise = 0
toRoma n
| n < 4000 = p1000 (f 3) ++ p100 (f 2) ++ p10 (f 1) ++ p1 (f 0)
| otherwise = "ERROR"
where
f m = (n `div` (10^m)) `mod` 10
p1000 x | x == 0 = ""
| otherwise = "M" ++ p1000 (x - 1)
p100 x | x == 0 = ""
| x == 9 = "CM"
| x == 4 = "CD"
| x >= 5 = "D" ++ p100 (x - 5)
| otherwise = "C" ++ p100 (x - 1)
p10 x | x == 0 = ""
| x == 9 = "XC"
| x == 4 = "XL"
| x >= 5 = "L" ++ p10 (x - 5)
| otherwise = "X" ++ p10 (x - 1)
p1 x | x == 0 = ""
| x == 9 = "IX"
| x == 4 = "IV"
| x >= 5 = "V" ++ p1 (x - 5)
| otherwise = "I" ++ p1 (x - 1)
main = do
getLine
ns <- map toNum . words <$> getLine
putStrLn $ toRoma $ sum ns