結果
| 問題 |
No.10 +か×か
|
| コンテスト | |
| ユーザー |
okaduki
|
| 提出日時 | 2017-05-20 05:03:52 |
| 言語 | Haskell (9.10.1) |
| 結果 |
AC
|
| 実行時間 | 1,805 ms / 5,000 ms |
| コード長 | 1,308 bytes |
| コンパイル時間 | 3,070 ms |
| コンパイル使用メモリ | 197,376 KB |
| 実行使用メモリ | 72,196 KB |
| 最終ジャッジ日時 | 2024-12-14 15:39:29 |
| 合計ジャッジ時間 | 9,703 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 12 |
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:18:19: 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."
|
18 | writeArray arr (head xs) 0
| ^^^^
Main.hs:32:16: warning: [GHC-63394] [-Wx-partial]
In the use of ‘tail’
(imported from Prelude, but defined in GHC.List):
"This is a partial function, it throws an error on empty lists. Replace it with drop 1, or use pattern matching or Data.List.uncons instead. Consider refactoring to use Data.List.NonEmpty."
|
32 | ) arr (tail xs)
| ^^^^
[2 of 2] Linking a.out
ソースコード
{-# LANGUAGE FlexibleContexts, OverloadedStrings #-}
import Control.Applicative
import Control.Monad
import qualified Data.ByteString.Char8 as B
import Data.Maybe (fromJust)
import Text.Printf
import Debug.Trace
import Data.Array.IArray
import Data.Array.ST
getInts :: IO [Int]
getInts = map (fst . fromJust . B.readInt) . B.words <$> B.getLine
inf = 114514
g tot xs = runSTArray $ do
arr <- newArray (0,tot) (-inf)
writeArray arr (head xs) 0
foldM (\a x -> do
a' <- newArray (0,tot) (-inf)
plused <- forM [i | i <- [0..tot], i+x <= tot]
(\i -> readArray a i >>= \s -> return (i+x, s*2 + 1))
forM_ plused (\(i,x) -> writeArray a' i x)
multied <- forM [i | i <- [0..tot], i*x <= tot]
(\i -> readArray a i >>= \s -> return (i*x, s*2))
forM_ multied $ \(i,x) -> do
px <- readArray a' i
if x > px then writeArray a' i x
else return ()
return a'
) arr (tail xs)
solve tot xs = (g tot xs)!tot
conv x n = (\(_,_,s) -> reverse s) $ until (\(i,_,_) -> i <= 1)
(\(i,x,s) -> (i-1, x `div` 2, s ++ (if x`mod`2 == 0 then "*" else "+"))) (n,x,"")
main = do
[n] <- getInts
[tot] <- getInts
xs <- getInts
putStrLn $ conv (solve tot xs) n
okaduki