結果
| 問題 |
No.70 睡眠の重要性!
|
| コンテスト | |
| ユーザー |
情報学生
|
| 提出日時 | 2019-08-18 10:03:42 |
| 言語 | Haskell (9.10.1) |
| 結果 |
AC
|
| 実行時間 | 2 ms / 5,000 ms |
| コード長 | 753 bytes |
| コンパイル時間 | 4,166 ms |
| コンパイル使用メモリ | 172,928 KB |
| 実行使用メモリ | 5,248 KB |
| 最終ジャッジ日時 | 2024-10-01 13:40:19 |
| 合計ジャッジ時間 | 4,642 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 * 6 |
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:2:89: warning: [GHC-63394] [-Wx-partial]
In the use of ‘tail’
(imported from Prelude, but defined in GHC.List):
"This is a partial function, it throws an error on empty lists. Replace it with drop 1, or use pattern matching or Data.List.uncons instead. Consider refactoring to use Data.List.NonEmpty."
|
2 | toHHMM s = ((read :: String -> Int) . takeWhile (/= ':') $ s, (read :: String -> Int) . tail . dropWhile (/= ':') $ s)
| ^^^^
Main.hs:21:45: warning: [GHC-63394] [-Wx-partial]
In the use of ‘tail’
(imported from Prelude, but defined in GHC.List):
"This is a partial function, it throws an error on empty lists. Replace it with drop 1, or use pattern matching or Data.List.uncons instead. Consider refactoring to use Data.List.NonEmpty."
|
21 | main = interact $ show . solve . splitAt2 . tail . words
| ^^^^
[2 of 2] Linking a.out
ソースコード
toHHMM :: String -> (Int, Int)
toHHMM s = ((read :: String -> Int) . takeWhile (/= ':') $ s, (read :: String -> Int) . tail . dropWhile (/= ':') $ s)
sleepTime :: (Int, Int) -> (Int, Int) -> Int
sleepTime (h1, m1) (h2, m2)
| h2 > h1 && m2 >= m1 = (h2 - h1) * 60 + m2 - m1
| h2 > h1 && m2 < m1 = (h2 - 1 - h1) * 60 + m2 + 60 - m1
| h2 == h1 && m2 >= m1 = m2 - m1
| otherwise = (h2 + 23 - h1) * 60 + m2 + 60 - m1
splitAt2 :: [String] -> [[String]]
splitAt2 = takeWhile (not.null) . map (take 2) . iterate (drop 2)
solve :: [[String]] -> Int
solve xss = sum zs
where
ys = map (map toHHMM) xss
zs = map (\[x, y] -> sleepTime x y) ys
main :: IO ()
main = interact $ show . solve . splitAt2 . tail . words
情報学生