結果

問題 No.406 鴨等間隔の法則
コンテスト
ユーザー Naoki_M_
提出日時 2016-08-13 13:26:34
言語 Haskell
(9.14.1)
コンパイル:
ghc -rtsopts -with-rtsopts=-K1G -o a.out -O2 _filename_
実行:
./a.out
結果
AC  
実行時間 106 ms / 2,000 ms
+ 65µs
コード長 321 bytes
記録
記録タグの例:
初AC ショートコード 純ショートコード 純主流ショートコード 最速実行時間
コンパイル時間 2,539 ms
コンパイル使用メモリ 207,708 KB
実行使用メモリ 27,904 KB
最終ジャッジ日時 2026-08-11 04:34:37
合計ジャッジ時間 6,419 ms
ジャッジサーバーID
（参考情報） 		judge2_0 / judge3_0
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 29
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-9.14.1/environments/default
[1 of 2] Compiling Main             ( Main.hs, Main.o )
Main.hs:5:92: warning: [GHC-63394] [-Wx-partial]
    In the use of ‘tail’
    (imported from Data.List, but defined in GHC.Internal.List):
    "This is a partial function, it throws an error on empty lists. Replace it with 'drop' 1, or use pattern matching or 'GHC.Internal.Data.List.uncons' instead. Consider refactoring to use "Data.List.NonEmpty"."
  |
5 | main = BS.getContents >>= putStrLn . solve [] . sort . map (fst . fromJust . BS.readInt) . tail . BS.words
  |                                                                                            ^^^^

Main.hs:7:19: warning: [GHC-63394] [-Wx-partial]
    In the use of ‘head’
    (imported from Data.List, 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"."
  |
7 | solve ls [_] = if head ls /= 0 && all (== head ls) (tail ls) then "YES" else "NO"
  |                   ^^^^

Main.hs:7:43: warning: [GHC-63394] [-Wx-partial]
    In the use of ‘head’
    (imported from Data.List, 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"."
  |
7 | solve ls [_] = if head ls /= 0 && all (== head ls) (tail ls) then "YES" else "NO"
  |                                           ^^^^

Main.hs:7:53: warning: [GHC-63394] [-Wx-partial]
    In the use of ‘tail’
    (imported from Data.List, but defined in GHC.Internal.List):
    "This is a partial function, it throws an error on empty lists. Replace it with 'drop' 1, or use pattern matching or 'GHC.Internal.Data.List.uncons' instead. Consider refactoring to use "Data.Lis

ソースコード

diff #
raw source code 

import qualified Data.ByteString.Char8 as BS
import Data.List
import Data.Maybe

main = BS.getContents >>= putStrLn . solve [] . sort . map (fst . fromJust . BS.readInt) . tail . BS.words

solve ls [_] = if head ls /= 0 && all (== head ls) (tail ls) then "YES" else "NO"
solve ls (a0:a1:as) = solve ((a0 - a1):ls) (a1:as)
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