main :: IO()
main = do
 [a,b,c] <- map read . words <$> getLine :: IO [Int]
 -- 2 * sqrt(a * b) < c - a - b. Right hand is Int.
 let rightHand = fromInteger (c - a - b)
 let aDouble = fromInteger :: Double
 let bDouble = fromInteger :: Double 
 let leftHand = 2 * sqrt $ aDouble * bDouble
 putStr $ if (leftHand < rightHand) then "Yes" else "No"
