結果

問題 No.1109 調の判定
ユーザー satanic
提出日時 2020-07-22 20:24:04
言語 Haskell
(9.10.1)
結果
AC  
実行時間 2 ms / 2,000 ms
コード長 548 bytes
コンパイル時間 4,853 ms
コンパイル使用メモリ 173,824 KB
実行使用メモリ 6,944 KB
最終ジャッジ日時 2024-06-22 04:23:08
合計ジャッジ時間 6,078 ms
ジャッジサーバーID
（参考情報） 		judge3 / judge2
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ファイルパターン 結果
sample AC * 3
other AC * 43
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-9.8.2/environments/default
[1 of 2] Compiling Main             ( Main.hs, Main.o )

Main.hs:16:14: 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."
   |
16 |     | check (head t) p = calc (tail t) p
   |              ^^^^

Main.hs:16:32: warning: [GHC-63394] [-Wx-partial]
    In the use of ‘tail’
    (imported from Data.List, 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."
   |
16 |     | check (head t) p = calc (tail t) p
   |                                ^^^^

Main.hs:24:37: 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."
   |
24 |     print $ if length ans == 1 then head ans else -1
   |                                     ^^^^
[2 of 2] Linking a.out

ソースコード

diff # 

{-# LANGUAGE ScopedTypeVariables #-}
module Main where
import Data.List
import Control.Monad

readLine :: Read a => IO [a]
readLine = map read . words <$> getLine

check :: Int -> Int -> Bool
check s p = elem s $ map ((`mod` 12) . (+p)) [0,2,4,5,7,9,11]

calc :: [Int] -> Int -> Bool
calc t p
    | p == -1 = False
    | null t = True
    | check (head t) p = calc (tail t) p
    | otherwise = False

main :: IO ()
main = do
    getLine
    t <- readLine
    let ans = [p | p<-[0..11], calc t p]
    print $ if length ans == 1 then head ans else -1
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