-- https://github.com/minoki/my-atcoder-solutions
import Data.Char (isSpace)
import Data.List (unfoldr)
import qualified Data.ByteString.Char8 as BS

main = do
  [a,b,c] <- unfoldr (BS.readInteger . BS.dropWhile isSpace) <$> BS.getLine
  -- sqrt a + sqrt b < sqrt c
  -- <=> (sqrt a + sqrt b)^2 < c
  -- <=> a + b + 2 * sqrt a * sqrt b < c
  -- <=> 2 * sqrt a * sqrt b < c - a - b
  -- <=> 0 < c - a - b, 4 * a * b < (c - a - b)^2
  if 0 < c - a - b && 4 * a * b < (c - a - b)^2 then
    putStrLn "Yes"
  else
    putStrLn "No"
