main :: IO()
main = do
 [a,b,c] <- map read . words <$> getLine :: IO [Integer]
 let rightHand = fromInteger $ (c - a - b) * (c - a - b)
 let aDouble = fromInteger a :: Double
 let bDouble = fromInteger b :: Double 
 let leftHand = 4.0 * aDouble * bDouble
 putStr $ if (leftHand < rightHand) then "Yes" else "No"
