結果
| 問題 | No.185 和風 |
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2015-07-19 04:28:09 |
| 言語 | Haskell (9.14.1) |
| 結果 |
AC
|
| 実行時間 | 7 ms / 1,000 ms |
| コード長 | 304 bytes |
| 記録 | |
| コンパイル時間 | 1,439 ms |
| コンパイル使用メモリ | 197,632 KB |
| 実行使用メモリ | 10,496 KB |
| 最終ジャッジ日時 | 2026-03-30 03:43:39 |
| 合計ジャッジ時間 | 1,438 ms |
|
ジャッジサーバーID (参考情報) |
judge1_0 / judge2_0 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 7 |
コンパイルメッセージ
Loaded package environment from /home/judge/.ghc/x86_64-linux-9.14.1/environments/default
[1 of 2] Compiling Main ( Main.hs, Main.o )
Main.hs:5:19: warning: [GHC-63394] [-Wx-partial]
In the use of ‘head’
(imported from Prelude, but defined in GHC.Internal.List):
"This is a partial function, it throws an error on empty lists. Use pattern matching, 'Data.List.uncons' or 'Data.Maybe.listToMaybe' instead. Consider refactoring to use "Data.List.NonEmpty"."
|
5 | | same xs' && head xs' > 0 = head xs'
| ^^^^
Main.hs:5:34: warning: [GHC-63394] [-Wx-partial]
In the use of ‘head’
(imported from Prelude, but defined in GHC.Internal.List):
"This is a partial function, it throws an error on empty lists. Use pattern matching, 'Data.List.uncons' or 'Data.Maybe.listToMaybe' instead. Consider refactoring to use "Data.List.NonEmpty"."
|
5 | | same xs' && head xs' > 0 = head xs'
| ^^^^
[2 of 2] Linking a.out
ソースコード
main = getLine >> getContents >>= print . solve . map (map read . words) . lines
solve :: [[Int]] -> Int
solve xs
| same xs' && head xs' > 0 = head xs'
| otherwise = -1
where
xs' = map (\[x, y] -> y - x) xs
same (y : ys) = foldl (\acc x -> y == x && acc) True ys