N, M = gets.split.map(&:to_i) a = Array.new(N, 0) for i in 0...M do b = gets.split.map(&:to_i) for j in 0...N do a[j] += b[j] end s = 0 l = 0 for r in 0...N do s += a[r] while l < r && s > 777 do s -= a[l] l += 1 end if s == 777 then puts "YES" exit end end end puts "NO"