-- https://github.com/minoki/my-atcoder-solutions
import Data.Char (isSpace)
import Data.List (unfoldr)
import qualified Data.ByteString.Char8 as BS

main = do
  [a,b,c] <- map fromInteger . unfoldr (BS.readInteger . BS.dropWhile isSpace) <$> BS.getLine
  let _ = a :: Double
  if sqrt a + sqrt b < sqrt c then
    putStrLn "Yes"
  else
    putStrLn "No"
