結果
| 問題 | No.36 素数が嫌い! |
| コンテスト | |
| ユーザー |
tottoripaper
|
| 提出日時 | 2014-11-24 06:02:49 |
| 言語 | Haskell (9.14.1) |
| 結果 |
AC
|
| 実行時間 | 213 ms / 5,000 ms |
| コード長 | 661 bytes |
| 記録 | |
| コンパイル時間 | 3,872 ms |
| コンパイル使用メモリ | 193,792 KB |
| 実行使用メモリ | 9,984 KB |
| 最終ジャッジ日時 | 2026-03-14 00:08:58 |
| 合計ジャッジ時間 | 3,487 ms |
|
ジャッジサーバーID (参考情報) |
judge3_0 / judge1_0 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 26 |
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:8:17: 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 | factor n = map (head &&& length) . group $ helper n 2
| ^^^^
Main.hs:17:30: 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"."
|
17 | | length fs == 2 && (snd . head . reverse . sortBy (comparing snd)) fs >= 2 = True
| ^^^^
Main.hs:18:30: 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"."
|
18 | | length fs == 1 && (snd . head . reverse . sortBy (comparing snd)) fs >= 3 = True
| ^^^^
[2 of 2] Linking a.out
ソースコード
{-# LANGUAGE Arrows #-}
import Control.Arrow
import Data.List (group, sortBy)
import Data.Ord
factor 1 = []
factor n = map (head &&& length) . group $ helper n 2
where
helper n x
| x * x > n = if n > 1 then [n] else []
| n `mod` x == 0 = x : helper (n `div` x) x
| otherwise = helper n (x+1)
can n
| length fs > 2 = True
| length fs == 2 && (snd . head . reverse . sortBy (comparing snd)) fs >= 2 = True
| length fs == 1 && (snd . head . reverse . sortBy (comparing snd)) fs >= 3 = True
| otherwise = False
where
fs = factor n
main = do
n <- readLn
putStrLn $ if can n then "YES" else "NO"
tottoripaper