結果
| 問題 |
No.451 575
|
| コンテスト | |
| ユーザー |
okaduki
|
| 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)
okaduki