結果

問題 No.36 素数が嫌い！
コンテスト
ユーザー poapoa
提出日時 2020-08-30 23:07:03
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 457 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 2,340 ms
コンパイル使用メモリ 195,456 KB
実行使用メモリ 22,528 KB
最終ジャッジ日時 2026-05-10 13:23:13
合計ジャッジ時間 14,146 ms
ジャッジサーバーID
（参考情報） 		judge2_0 / judge3_0
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
sample -- * 4
other TLE * 1 -- * 25
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:8:23: warning: [GHC-63394] [-Wx-partial]
    In the use of ‘head’
    (imported from Prelude, 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"."
  |
8 | primeFactors m = f m (head primes) (tail primes) where
  |                       ^^^^

Main.hs:8:37: warning: [GHC-63394] [-Wx-partial]
    In the use of ‘tail’
    (imported from Prelude, 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"."
  |
8 | primeFactors m = f m (head primes) (tail primes) where
  |                                     ^^^^

Main.hs:12:24: warning: [GHC-63394] [-Wx-partial]
    In the use of ‘head’
    (imported from Prelude, 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"."
   |
12 |     | otherwise = f m (head ns) (tail ns)
   |                        ^^^^

Main.hs:12:34: warning: [GHC-63394] [-Wx-partial]
    In the use of ‘tail’
    (imported from Prelude, 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"."
   |
12 |     | otherwise = f m (head ns) (tail ns)
   |                                  ^^^^

[2 of 2] Linking a.out

ソースコード

diff #
raw source code 

import           Data.Bool
import qualified Data.List as List

main :: IO ()
main = readLn >>= putStrLn . bool "NO" "YES" . (>= 3) . length . List.group . primeFactors

primeFactors :: Int -> [Int]
primeFactors m = f m (head primes) (tail primes) where
  f m n ns
    | m < 2 = []
    | m `mod` n == 0 = n : f (m `div` n) n ns
    | otherwise = f m (head ns) (tail ns)

primes :: [Int]
primes = f [2..] where f (p : ns) = p : f [n | n <- ns, n `mod` p /= 0]
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