import Data.List.Split

main :: IO ()
main = do
    getLine
    a <- map parse . lines <$> getContents
    let (i, p) = (sum $ map fst a, sum $ map snd a)
    let s = show(10^10 * i + p)
    putStrLn s

parse :: String -> (Integer, Integer)
parse = zipInt . splitWhen (== '.')

zipInt :: [String] -> (Integer, Integer)
zipInt [a, b] = (read a, readPoint b)
zipInt [a] = (read a, 0)

readPoint :: String -> Integer
readPoint = read . take 10 . (++ repeat '0')