結果
| 問題 |
No.2941 Sigma Music Game Score Problem
|
| コンテスト | |
| ユーザー |
torus711
|
| 提出日時 | 2024-10-18 22:54:41 |
| 言語 | Haskell (9.10.1) |
| 結果 |
AC
|
| 実行時間 | 339 ms / 2,500 ms |
| コード長 | 1,255 bytes |
| コンパイル時間 | 2,937 ms |
| コンパイル使用メモリ | 180,480 KB |
| 実行使用メモリ | 47,388 KB |
| 最終ジャッジ日時 | 2024-10-18 22:56:54 |
| 合計ジャッジ時間 | 8,136 ms |
|
ジャッジサーバーID (参考情報) |
judge7 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 29 |
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:48:79: 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."
|
48 | print $ ( `mod` modulo ) $ sum $ map ( sqsum . pred ) $ zipWith (-) ( tail xs ) xs
| ^^^^
[2 of 2] Linking a.out
ソースコード
{-# LANGUAGE BangPatterns #-}
{-# LANGUAGE BinaryLiterals #-}
{-# LANGUAGE MultiWayIf #-}
{-# LANGUAGE NumDecimals #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TupleSections #-}
{-# LANGUAGE FlexibleContexts #-}
{-# OPTIONS_GHC -O2 #-}
{-# OPTIONS_GHC -Wno-tabs #-}
import Control.Applicative
import Control.Arrow
import Control.Monad
import Control.Monad.ST
import Data.Char
import Data.List
import Data.Maybe
import qualified Data.ByteString.Char8 as B
import Data.Array
import Data.Array.ST.Safe
import Data.STRef
import Debug.Trace
import Text.Printf
readInt = readLn :: IO Int
readInteger = readLn :: IO Integer
readInts = map ( fst . fromJust . B.readInt ) . B.words <$> B.getLine
readIntegers = map ( fst . fromJust . B.readInteger ) . B.words <$> B.getLine
which a b f = if f then a else b
mp [ a, b ] = ( a, b )
modifyArray a i f = writeArray a i =<< f <$> readArray a i
printList :: Show a => [a] -> IO ()
printList = putStrLn . intercalate " " . map show
modulo = 998244353
main = do
[ m, n ] <- readInts
xs <- ( -1 : ) . ( ++ [ fromIntegral m ] ) . map pred <$> readIntegers
print $ ( `mod` modulo ) $ sum $ map ( sqsum . pred ) $ zipWith (-) ( tail xs ) xs
sqsum n = n * ( n + 1 ) * ( 2 * n + 1 ) `div` 6 `mod` modulo
torus711