module Main where
import Control.Monad
import Control.Applicative
import Data.Maybe
import Data.List
import qualified Text.Printf
import qualified Data.ByteString.Char8 as BC
import qualified Data.ByteString as BC

import           Data.Array.Unboxed (UArray, (!), listArray)
import qualified Data.Array.Unboxed as UArray

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main :: IO ()
main = do
  [n, m] <- readInts
  rawStats <- replicateM m $ readInts
  let stat0 = replicate n 0
      stats = map (listArray (0, n-1)) $ scanl' (zipWith (+)) stat0 rawStats
      res = any (check777 n) stats
  putStrLn $ if res then "YES" else "NO"

check777 :: Int -> UArray Int Int -> Bool
check777 ub stat = f 0 0 0
  where
    f l r acc
      | r == ub && l == ub = False
      | acc == 777         = True
      | r == ub            = f (l+1) r (acc - (stat ! l))
      | acc < 777          = f l (r+1) (acc + (stat ! r))
      | otherwise          = f (l+1) r (acc - (stat ! l))

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{- Int input -}

parseInt :: BC.ByteString -> Int
parseInt = fst . fromJust . BC.readInt

parseInts :: BC.ByteString -> [Int]
parseInts = map parseInt <$> BC.words

readInt :: IO Int
readInt = parseInt <$> BC.getLine

readInts :: IO [Int]
readInts = parseInts <$> BC.getLine

{- Double Formatting -}

doubleFmt :: Double -> String
doubleFmt = Text.Printf.printf "%.12f"