import qualified Data.Text as T
import qualified Data.Text.IO as T
import qualified Data.Text.Read as T

main :: IO ()
main = do
  (a : b : c : _) <- map unsafeTextToInt . T.words <$> T.getLine :: IO [Int]
  putStrLn $ if a + b < c && 4 * a * b < (c - a - b) ^ 2 then "Yes" else "No"

unsafeTextToInt :: T.Text -> Int
unsafeTextToInt s = case T.signed T.decimal s of
  Right (n, _) -> n
