
{-
  a + 2 sqrt(ab) + b < c
  2 sqrt(ab) < c - a - b
-}


solve :: Int -> Int -> Int -> Bool
solve a b c
  | c - a - b < 0 = False
  | otherwise = 4*a*b < (c-a-b)*(c-a-b)


test :: IO ()
test = do
  print $ solve 2 3 9 == False
  print $ solve 2 3 10 == True
  print $ solve 1 1 1 == False
  print $ solve 1 1 2 == False

main = do
  [a,b,c] <- map read . words <$> getLine
  putStrLn $ if solve a b c then "Yes" else "No"
