結果

問題 No.92 逃走経路
ユーザー ducktailducktail
提出日時 2018-06-16 17:15:51
言語 Haskell
(9.8.2)
結果
CE  
(最新)
AC  
(最初)
実行時間 -
コード長 1,162 bytes
コンパイル時間 813 ms
コンパイル使用メモリ 150,400 KB
最終ジャッジ日時 2024-06-30 16:18:04
合計ジャッジ時間 1,460 ms
ジャッジサーバーID
（参考情報） 		judge2 / judge1
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コンパイルエラー時のメッセージ・ソースコードは、提出者また管理者しか表示できないようにしております。（リジャッジ後のコンパイルエラーは公開されます）
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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:9:1: error: [GHC-87110]
    Could not load module ‘Data.Map’.
    It is a member of the hidden package ‘containers-0.6.8’.
    Use -v to see a list of the files searched for.
  |
9 | import Data.Map (Map)
  | ^^^^^^^^^^^^^^^^^^^^^

Main.hs:10:1: error: [GHC-87110]
    Could not load module ‘Data.Map’.
    It is a member of the hidden package ‘containers-0.6.8’.
    Use -v to see a list of the files searched for.
   |
10 | import qualified Data.Map as M
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Main.hs:12:1: error: [GHC-87110]
    Could not load module ‘Data.IntSet’.
    It is a member of the hidden package ‘containers-0.6.8’.
    Use -v to see a list of the files searched for.
   |
12 | import Data.IntSet (IntSet)
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^

Main.hs:13:1: error: [GHC-87110]
    Could not load module ‘Data.IntSet’.
    It is a member of the hidden package ‘containers-0.6.8’.
    Use -v to see a list of the files searched for.
   |
13 | import qualified Data.IntSet as IS
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

ソースコード

diff # 

import Control.Applicative ((<$>), (<*>))
import Control.Monad (replicateM)

import Data.ByteString.Char8 (ByteString)
import qualified Data.ByteString.Char8 as B

import Data.List (unfoldr, foldl')
import Data.Char (isSpace)
import Data.Map (Map)
import qualified Data.Map as M

import Data.IntSet (IntSet)
import qualified Data.IntSet as IS

main :: IO ()
main = do
  [n, m, _] <- f
  solve n <$> replicateM m f <*> f >>= mapM_ putStrLn
  where f = readil B.readInt <$> B.getLine

solve :: Int -> [[Int]] -> [Int] -> [String]
solve n fts fs = let ls = foldl' (g mp) (IS.fromList [1..n]) fs in [(show . IS.size) ls, (unwords . map show . IS.toList) ls]
  where f mp [a, b, c] = M.insertWith (++) (a, c) [b] (M.insertWith (++) (b, c) [a] mp)
        mp = foldl' f M.empty fts
        g mp st d = IS.foldl' h IS.empty st
          where h s p = case M.lookup (p, d) mp of
                         Just xs -> IS.union s (IS.fromList xs)
                         Nothing -> s

readil :: Integral a =>  (ByteString -> Maybe (a, ByteString)) -> ByteString -> [a]
readil f = unfoldr g
  where
    g s = do
      (n, s') <- f s
      return (n, B.dropWhile isSpace s')
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