結果

問題 No.123 カードシャッフル
ユーザー aimy
提出日時 2017-07-08 11:22:03
言語 Haskell
(9.10.1)
結果
AC  
実行時間 560 ms / 5,000 ms
コード長 235 bytes
コンパイル時間 4,160 ms
コンパイル使用メモリ 176,128 KB
実行使用メモリ 42,624 KB
最終ジャッジ日時 2024-10-06 19:38:38
合計ジャッジ時間 6,180 ms
ジャッジサーバーID
（参考情報） 		judge1 / judge5
このコードへのチャレンジ
（要ログイン）
ファイルパターン 結果
sample AC * 4
other AC * 10
権限があれば一括ダウンロードができます
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:8:13: warning: [GHC-63394] [-Wx-partial]
    In the use of ‘head’
    (imported from Data.List, 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 | shuffle n = head . foldl top [1..n]
  |             ^^^^

Main.hs:9:29: warning: [GHC-63394] [-Wx-partial]
    In the use of ‘head’
    (imported from Data.List, 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."
  |
9 |  where top deck i = let c = head (drop (i-1) deck) in c : (delete c deck)
  |                             ^^^^
[2 of 2] Linking a.out

ソースコード

diff #
プレゼンテーションモードにする

import Data.List
main = do
 [n,_] <- map read . words <$> getLine
 as <- map read . words <$> getLine
 print (shuffle n as)
shuffle n = head . foldl top [1..n]
 where top deck i = let c = head (drop (i-1) deck) in c : (delete c deck)
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0