結果
問題 |
No.4 おもりと天秤
|
ユーザー |
![]() |
提出日時 | 2018-05-21 22:50:56 |
言語 | Haskell (9.10.1) |
結果 |
TLE
|
実行時間 | - |
コード長 | 483 bytes |
コンパイル時間 | 8,442 ms |
コンパイル使用メモリ | 170,240 KB |
実行使用メモリ | 13,184 KB |
最終ジャッジ日時 | 2024-06-28 15:38:14 |
合計ジャッジ時間 | 12,740 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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ファイルパターン | 結果 |
---|---|
other | AC * 5 TLE * 1 -- * 17 |
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:15:37: 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 | | otherwise = resolve' ((a + (head bs), tail bs):(a, tail bs):ps) | ^^^^ Main.hs:15:47: 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." | 15 | | otherwise = resolve' ((a + (head bs), tail bs):(a, tail bs):ps) | ^^^^ Main.hs:15:60: 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." | 15 | | otherwise = resolve' ((a + (head bs), tail bs):(a, tail bs):ps) | ^^^^ [2 of 2] Linking a.out
ソースコード
main = do n <- readLn :: IO Int ws <- (map read . words) <$> getLine let e = (sum ws) `div` 2 let ws' = filter (<= e) ws putStrLn $ if (odd $ sum ws) || (sum ws' < e) then "impossible" else resolve e ws' resolve e ws = resolve' [(0, ws)] where resolve' :: [(Int, [Int])] -> String resolve' [] = "impossible" resolve' ((a,bs):ps) | a == e = "possible" | null bs = resolve' ps | otherwise = resolve' ((a + (head bs), tail bs):(a, tail bs):ps)