main = do
  [a,b,c] <- map read . words <$> getLine :: IO [Int]
  let left = (c^2) + (a^2) + (b^2) - (2*c*a) + (2*a*b) - (2*c*b)
  let right = 4 * a * b 
  putStrLn $ if right < left then "Yes" else "No"

