結果
問題 | No.451 575 |
ユーザー |
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提出日時 | 2016-12-07 00:36:17 |
言語 | Haskell (9.10.1) |
結果 |
AC
|
実行時間 | 320 ms / 2,000 ms |
コード長 | 874 bytes |
コンパイル時間 | 12,938 ms |
コンパイル使用メモリ | 180,440 KB |
実行使用メモリ | 70,656 KB |
最終ジャッジ日時 | 2024-12-17 12:43:20 |
合計ジャッジ時間 | 16,773 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 29 |
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:25:29: 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." | 25 | bs <- forM [1..n] $ \_ -> head <$> getInteger | ^^^^ [2 of 2] Linking a.out
ソースコード
import Control.Applicative import Control.Monad import qualified Data.ByteString.Char8 as B import Data.Maybe (fromJust) import Text.Printf import Debug.Trace readInts :: B.ByteString -> [Integer] readInts = map (fst . fromJust . B.readInteger) . B.words getInteger :: IO [Integer] getInteger = liftM readInts B.getLine solve _ [] _ r = r solve i (x:xs) acc (l,r) = solve (i+1) xs acc' (l',r') where acc' = acc + (if (i+1) `mod` 4 < 2 then x else -x) (l',r') = if i `mod` 4 < 2 then (l,min r acc') else (max l acc',r) iter p = scanl (\(prv,f) x -> if f then (x-prv,False) else (prv-x,True)) (p,True) main = do [n] <- getInteger bs <- forM [1..n] $ \_ -> head <$> getInteger let (l,r) = solve 0 bs 0 (-1,2000000000000000000) if l+1 < r && 1 < r then print (n+1) >> forM_ (iter (r-1) bs) (print . fst) else print (-1)