結果

問題 No.123 カードシャッフル
ユーザー HaarHaar
提出日時 2016-04-03 15:41:46
言語 Haskell
(9.8.2)
結果
AC  
実行時間 368 ms / 5,000 ms
コード長 270 bytes
コンパイル時間 2,132 ms
コンパイル使用メモリ 169,856 KB
実行使用メモリ 54,784 KB
最終ジャッジ日時 2024-04-10 10:46:38
合計ジャッジ時間 4,205 ms
ジャッジサーバーID
（参考情報） 		judge1 / judge3
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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
6,816 KB
testcase_01 AC 2 ms
6,940 KB
testcase_02 AC 1 ms
6,944 KB
testcase_03 AC 1 ms
6,940 KB
testcase_04 AC 1 ms
6,944 KB
testcase_05 AC 2 ms
6,940 KB
testcase_06 AC 2 ms
6,944 KB
testcase_07 AC 1 ms
6,940 KB
testcase_08 AC 1 ms
6,940 KB
testcase_09 AC 2 ms
6,940 KB
testcase_10 AC 184 ms
39,040 KB
testcase_11 AC 368 ms
54,784 KB
testcase_12 AC 335 ms
52,864 KB
testcase_13 AC 330 ms
52,864 KB
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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:2:20: 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."
  |
2 | shuffle cards p = (head post) : pre ++ (tail post)
  |                    ^^^^

Main.hs:2:41: 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 | shuffle cards p = (head post) : pre ++ (tail post)
  |                                         ^^^^

Main.hs:3:1: warning: [GHC-94817] [-Wtabs]
    Tab character found here, and in four further locations.
    Suggested fix: Please use spaces instead.
  |
3 |         where pre = take (p-1) cards;
  | ^^^^^^^^

Main.hs:8:29: 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."
  |
8 |         getLine >>= print . head . foldl shuffle [1..n] . map read . words
  |                             ^^^^
[2 of 2] Linking a.out

ソースコード

diff # 

shuffle :: [Int] -> Int -> [Int]
shuffle cards p = (head post) : pre ++ (tail post)
	where pre = take (p-1) cards;
		  post = drop (p-1) cards

main = do
	[n, _] <- getLine >>= return . map read . words
	getLine >>= print . head . foldl shuffle [1..n] . map read . words
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