結果

問題 No.455 冬の大三角
ユーザー okaduki
提出日時 2016-12-06 03:03:47
言語 Haskell
(9.10.1)
結果
AC  
実行時間 2 ms / 2,000 ms
コード長 855 bytes
コンパイル時間 8,071 ms
コンパイル使用メモリ 180,308 KB
実行使用メモリ 6,944 KB
最終ジャッジ日時 2024-06-29 21:07:29
合計ジャッジ時間 9,988 ms
ジャッジサーバーID
(参考情報)
judge2 / judge1
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 * 54
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:17:12: 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 | ps s h w = head $ filter ok [(x+dx,y+dy) | (dx,dy) <- [(-1,0),(1,0),(0,-1),(0,1)],
   |            ^^^^
[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 Control.Applicative
import Control.Monad
import qualified Data.ByteString.Char8 as B
import Data.Maybe (fromJust)
import Text.Printf
import Debug.Trace
-- or readInteger
readInts :: B.ByteString -> [Int]
readInts = map (fst . fromJust . B.readInt) . B.words
getInts :: IO [Int]
getInts = liftM readInts B.getLine
idx p h w = (p `mod` w, p `div` w)
ps s h w = head $ filter ok [(x+dx,y+dy) | (dx,dy) <- [(-1,0),(1,0),(0,-1),(0,1)],
(x,y) <- [(x1,y1),(x2,y2)]]
where
[(x1,y1),(x2,y2)] = [idx p h (w+1) | p <- '*' `B.elemIndices` s]
ok (x,y) = 0 <= x && x < w && 0 <= y && y < h
&& (x /= x1 || x /= x2) && (y /= y1 || y /= y2)
main = do
[h,w] <- getInts
s <- B.getContents
let (x,y) = ps s h w
let (fr, bk) = B.splitAt (y*(w+1)+x) s
B.putStr fr
putStr "*"
B.putStr $ B.tail bk
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