結果
問題 |
No.6 使いものにならないハッシュ
|
ユーザー |
![]() |
提出日時 | 2020-08-30 21:57:54 |
言語 | Haskell (9.10.1) |
結果 |
AC
|
実行時間 | 13 ms / 5,000 ms |
コード長 | 1,389 bytes |
コンパイル時間 | 7,319 ms |
コンパイル使用メモリ | 192,512 KB |
実行使用メモリ | 8,064 KB |
最終ジャッジ日時 | 2024-09-16 16:58:41 |
合計ジャッジ時間 | 8,544 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 * 32 |
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:31:16: 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." | 31 | func1 acc [] = head acc | ^^^^ Main.hs:32:51: 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 | func1 acc hps = func1 (func4 acc (func3 [] hps)) (tail hps) | ^^^^ [2 of 2] Linking a.out
ソースコード
import Data.Char import Data.Maybe import Control.Monad import Control.Monad.ST import Data.Array.ST import Data.Array.Unboxed sieveUA :: Int -> UArray Int Bool sieveUA top = runSTUArray $ do let m = (top-1) `div` 2 r = floor . sqrt $ fromIntegral top + 1 sieve <- newArray (1,m) True -- :: ST s (STUArray s Int Bool) forM_ [1..r `div` 2] $ \i -> do isPrime <- readArray sieve i when isPrime $ do -- ((2*i+1)^2-1)`div`2 == 2*i*(i+1) forM_ [2*i*(i+1), 2*i*(i+2)+1..m] $ \j -> do writeArray sieve j False return sieve primesToUA :: Int -> [Int] primesToUA top = 2 : [i*2+1 | (i,True) <- assocs $ sieveUA top] main :: IO () main = do k <- readLn :: IO Int n <- readLn :: IO Int let ps = dropWhile (<k) $ primesToUA n print (func1 [] (map func2 ps)) func1 :: [Int] -> [(Int, Int)] -> Int func1 acc [] = head acc func1 acc hps = func1 (func4 acc (func3 [] hps)) (tail hps) func2 :: Int -> (Int, Int) func2 p = (until (<10) (sum . map digitToInt . show) p, p) func3 :: [(Int, Int)] -> [(Int, Int)] -> [Int] func3 acc [] = map snd (reverse acc) func3 acc ((h,p):hps) | isJust $ lookup h acc = map snd (reverse acc) | otherwise = func3 ((h,p):acc) hps func4 :: [Int] -> [Int] -> [Int] func4 hps1 hps2 | length hps1 > length hps2 = hps1 | length hps1 < length hps2 = hps2 | otherwise = max hps1 hps2