import           Control.Monad
import qualified Data.ByteString.Char8 as BS
import           Data.Maybe

readInt = fst . fromJust . BS.readInt
readIntList = map readInt . BS.words
getInt = readInt <$> BS.getLine
getIntList = readIntList <$> BS.getLine

main = do
  [a, b, c] <- getIntList
  putStrLn $ if (c - a - b) > 0 && 4 * a * b < (c - a - b) ^ 2
             then "Yes"
             else "No"