import Control.Monad
import Data.Maybe
import qualified Data.ByteString.Char8 as BS
import Data.List

readInt = fst . fromJust . BS.readInt
readIntList = map readInt . BS.words
getInt = readInt <$> BS.getLine
getIntList = readIntList <$> BS.getLine

main = do
    [a, b, c] <- getIntList
    putStrLn $ if  c - a - b > 0 && 4 * a * b < (c - a - b) ^ 2 then "Yes" else "No"