結果
| 問題 |
No.462 6日知らずのコンピュータ
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2017-04-15 16:16:56 |
| 言語 | Haskell (9.10.1) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 792 bytes |
| コンパイル時間 | 3,286 ms |
| コンパイル使用メモリ | 170,624 KB |
| 実行使用メモリ | 5,376 KB |
| 最終ジャッジ日時 | 2024-07-18 17:56:17 |
| 合計ジャッジ時間 | 5,652 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 44 WA * 40 |
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:27:34: warning: [GHC-63394] [-Wx-partial]
In the use of ‘head’
(imported from Data.List, 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."
|
27 | | (checkBit as $ head as) == True = countGroup (n + 1) $ last as
| ^^^^
[2 of 2] Linking a.out
ソースコード
import Data.Int
import Data.List
import Data.Bits
factorial 0 = 1
factorial x = factorial (x - 1) * x
checkBit [] x = True
checkBit (a:as) x = checkBit as a && x == x .&. a
countGroup :: Integer -> Integer -> Integer
countGroup n x = factorial (n - x')
where
x' = (fromIntegral (popCount x)) :: Integer
ans x = x `mod` (10^9 + 7)
main = do
str1 <- getLine
let [n, k] = map read $ words str1 :: [Integer]
str2 <- if k /= 0
then getLine
else return ("")
let
as = sort $ map read $ words str2 :: [Integer]
result | k == 0 = factorial n
| (checkBit as $ head as) == True = countGroup (n + 1) $ last as
| otherwise = 0
print $ ans result