fun main(args: Array<String>) { 
  val (ws, n) = readLine()!!.split(" ").map { it.toInt() }
  val xs = (1..ws).map { 0 }.toMutableList()
  
  var check = false
  for( nn in (1..n) ) { 
    readLine()!!.split(" ").map { it.toInt() }.mapIndexed { index, x ->
      xs[index] += x
      
      if( check == false ) {
        scan@for( s in (0..xs.size-1) ) { 
          for( e in (s..xs.size-1) ) { 
            if( xs.slice(s..e).sum() == 777) {
              check = true
              continue@scan
            }
          }
        }
      }
    }
  }

  if(check) 
    println("YES")
  else
    println("NO")
}