import scala.io.StdIn.readLine

@main def yuki1948(): Unit =
  val hw = readLine.split(" ").map(_.toInt)
  val (h, w) = (hw(0), hw(1))
  val dp: Array[Array[Array[Long]]] = Array.ofDim[Long](2, 500, 500)
  val input: Array[Array[Long]] = Array.ofDim[Long](500, 500)
  for
    i <- 0 until h
  do
    input(i) = readLine().split(" ").map(_.toLong)
  dp(0)(0)(0) = input(0)(0)
  for
    f <- 0 until 2
    y <- 0 until h
    x <- 0 until w
  do
    if y < h - 1 then
      if dp(f)(y)(x) > input(y + 1)(x) && dp(f)(y + 1)(x) < dp(f)(y)(x) + input(y + 1)(x) then
        dp(f)(y + 1)(x) = dp(f)(y)(x) + input(y + 1)(x)
      if f == 0 && dp(1)(y + 1)(x) < dp(0)(y)(x) then
        dp(1)(y + 1)(x) = dp(0)(y)(x)
    if x < w - 1 then
      if dp(f)(y)(x) > input(y)(x + 1) && dp(f)(y)(x + 1) < dp(f)(y)(x) + input(y)(x + 1) then
        dp(f)(y)(x + 1) = dp(f)(y)(x) + input(y)(x + 1)
      if f == 0 && dp(1)(y)(x + 1) < dp(0)(y)(x) then
        dp(1)(y)(x + 1) = dp(0)(y)(x)
  val ans = if (dp(0)(h - 1)(w - 1) + dp(1)(h - 1)(w - 1)) > input(h - 1)(w - 1) then "Yes" else "No"
  println(ans)