import Data.Array.Unboxed (accumArray, elems, UArray)
import Data.List (transpose)

judge :: Int -> [[Int]] -> String
judge m xs
    | head ss >= (maximum $ tail ss) = "YES"
    | otherwise                      = "NO"
    where
        ar = accumArray (+) 0 (0, m) $ map (\(b : a : _) -> (b, a)) xs :: UArray Int Int
        ss = elems ar

main :: IO ()
main = getLine >> getContents >>= putStrLn . judge 100 .
    transpose . map (map read) . map words . reverse . lines