結果

問題 No.743 Segments on a Polygon
コンテスト
ユーザー momen999
提出日時 2019-03-02 23:13:42
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
TLE  
実行時間 -
コード長 624 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 4,400 ms
コンパイル使用メモリ 196,224 KB
実行使用メモリ 91,172 KB
最終ジャッジ日時 2026-03-08 08:21:30
合計ジャッジ時間 38,699 ms
ジャッジサーバーID
(参考情報)
judge2 / judge3
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
other TLE * 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-9.14.1/environments/default
[1 of 2] Compiling Main             ( Main.hs, Main.o )
Main.hs:9:18: 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"."
  |
9 | solve xs = iter (head xs) xs + solve (tail xs) where
  |                  ^^^^

Main.hs:9:39: 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"."
  |
9 | solve xs = iter (head xs) xs + solve (tail xs) where
  |                                       ^^^^

Main.hs:15:31: 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"."
   |
15 |                     c1 = b1 > head y
   |                               ^^^^

[2 of 2] Linking a.out

ソースコード

diff #
raw source code

import Control.Monad
import Data.List

rInteger :: String -> Integer
rInteger = read

solve :: [[Integer]] -> Integer
solve (_:[]) = 0
solve xs = iter (head xs) xs + solve (tail xs) where
    iter _ [] = 0
    iter x (y:ys) | c1 && c2    = 1 + iter x ys
                  | otherwise   = iter x ys
                  where
                    b1 = last x
                    c1 = b1 > head y
                    c2 = b1 < last y

main = do
    [n, m] <- map read . words <$> getLine
    ls <- sort . map (\ [x, y] -> if x > y then [y, x] else [x, y]) . map (map rInteger . words) <$> replicateM n getLine
    print $ solve ls
0