結果
| 問題 |
No.280 歯車の問題(1)
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2015-09-29 19:43:48 |
| 言語 | Haskell (9.10.1) |
| 結果 |
AC
|
| 実行時間 | 2 ms / 1,000 ms |
| コード長 | 460 bytes |
| コンパイル時間 | 2,343 ms |
| コンパイル使用メモリ | 174,464 KB |
| 実行使用メモリ | 5,376 KB |
| 最終ジャッジ日時 | 2024-07-19 18:02:25 |
| 合計ジャッジ時間 | 5,096 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| other | AC * 31 |
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:5:22: warning: [GHC-63394] [-Wx-partial]
In the use of ‘head’
(imported from Prelude, 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."
|
5 | solve xs = last xs % head xs
| ^^^^
[2 of 2] Linking a.out
ソースコード
module Main where
import Data.Ratio
solve :: [Integer] -> Rational
solve xs = last xs % head xs
formatRatio :: String -> String
formatRatio [] = []
formatRatio ('%':xs) = '/':formatRatio xs
formatRatio (x:xs) = x:formatRatio xs
main :: IO()
main = do
n <- fmap read getLine :: IO (Int)
zs <- fmap words getLine :: IO [String]
let zs' = fmap read zs :: [Integer]
let res = show $ solve zs'
putStrLn $ formatRatio res