{-
    sqrt(a) + sqrt(b) < sqrt(c)
    a + b + 2 * sqrt(a * b) < c
    4 * a * b < (c - a - b) ^ 2
-}

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