Submission #1127340

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Source Code Expand

module Main where
import Control.Monad
import Control.Applicative
import Data.Maybe
import Data.List
import qualified Text.Printf
import qualified Data.ByteString.Char8 as BC
import qualified Data.ByteString as BC

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main :: IO ()
main = do
  [sx, sy, tx, ty] <- readInts
  replicateM_ (tx-sx) $ putStr "R"
  replicateM_ (ty-sy) $ putStr "U"
  replicateM_ (tx-sx) $ putStr "L"
  replicateM_ (ty-sy+1) $ putStr "D"
  replicateM_ (tx-sx+1) $ putStr "R"
  replicateM_ (ty-sy+1) $ putStr "U"
  putStr "L"
  putStr "U"
  replicateM_ (tx-sx+1) $ putStr "L"
  replicateM_ (ty-sy+1) $ putStr "D"
  putStrLn "R"

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{- Int input -}

parseInt :: BC.ByteString -> Int
parseInt = fst . fromJust . BC.readInt

parseInts :: BC.ByteString -> [Int]
parseInts = map parseInt <$> BC.words

readInt :: IO Int
readInt = parseInt <$> BC.getLine

readInts :: IO [Int]
readInts = parseInts <$> BC.getLine

{- Double Formatting -}

doubleFmt :: Double -> String
doubleFmt = Text.Printf.printf "%.12f"

Submission Info

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