結果
問題 | No.4 おもりと天秤 |
ユーザー | e7a894 |
提出日時 | 2018-05-21 22:56:14 |
言語 | Haskell (9.8.2) |
結果 |
WA
|
実行時間 | - |
コード長 | 578 bytes |
コンパイル時間 | 1,722 ms |
コンパイル使用メモリ | 171,904 KB |
実行使用メモリ | 7,936 KB |
最終ジャッジ日時 | 2024-06-28 15:38:26 |
合計ジャッジ時間 | 2,374 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 1 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,376 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | WA | - |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | AC | 1 ms
5,376 KB |
testcase_07 | AC | 2 ms
5,376 KB |
testcase_08 | AC | 2 ms
5,376 KB |
testcase_09 | AC | 2 ms
5,376 KB |
testcase_10 | AC | 2 ms
5,376 KB |
testcase_11 | AC | 1 ms
5,376 KB |
testcase_12 | AC | 1 ms
5,376 KB |
testcase_13 | AC | 1 ms
5,376 KB |
testcase_14 | AC | 2 ms
5,376 KB |
testcase_15 | AC | 1 ms
5,376 KB |
testcase_16 | WA | - |
testcase_17 | AC | 1 ms
5,376 KB |
testcase_18 | AC | 45 ms
7,936 KB |
testcase_19 | AC | 2 ms
5,376 KB |
testcase_20 | AC | 2 ms
5,376 KB |
testcase_21 | AC | 2 ms
5,376 KB |
testcase_22 | AC | 2 ms
5,376 KB |
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:16:14: 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." | 16 | | a + (head bs) > e = resolve' ((a, tail bs):ps) | ^^^^ Main.hs:16:43: 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." | 16 | | a + (head bs) > e = resolve' ((a, tail bs):ps) | ^^^^ Main.hs:17:37: 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." | 17 | | otherwise = resolve' ((a + (head bs), tail bs):(a, tail bs):ps) | ^^^^ Main.hs:17:47: 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." | 17 | | otherwise = resolve' ((a + (head bs), tail bs):(a, tail bs):ps) | ^^^^ Main.hs:17:60: warning: [GHC-63394] [-Wx-partial] In the use of ‘tail’ (imported from Prelude, but defined in GHC
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 | sum bs < (e - a) = "impossible" | a + (head bs) > e = resolve' ((a, tail bs):ps) | otherwise = resolve' ((a + (head bs), tail bs):(a, tail bs):ps)