
import Control.Applicative
import Data.List
import Data.Char

getInt :: IO Int
getInt = (\a -> read a :: Int) <$> getLine

getIntArray :: IO [Int]
getIntArray = ((map (\a -> read a :: Int)) . words) <$> getLine

getStrArray :: Int -> IO [String]
getStrArray 0 = return [] :: IO [String]
getStrArray n = (:) <$> getLine <*> (getStrArray (n - 1))

main = do
    [a, b, c] <- getIntArray
    putStrLn $ if c <= a + b then "Yes" else "No"
