
import System.IO
import Control.Applicative ((<$>))

main = do
  s <- getLine
  let (a:b:c:_) = (\x -> read x :: Int) <$> words s
  putStrLn $ if isLegal a b c then "Yes" else "No"


isLegal :: Int -> Int -> Int -> Bool
isLegal a b c | a == b + c = True
              | a + b == c = True
              | a + c == b = True
              | otherwise  = False