package main

import . "fmt"
import . "os"
import bf "bufio"

func main() {
	rd := bf.NewReader(Stdin)
	var h, w int
	Fscan(rd, &h, &w)
	dp0 := make([]int, w)
	dp1 := make([]int, w)
	for i := 0; i < h; i++ {
		tmp0 := make([]int, w)
		tmp1 := make([]int, w)
		for j := 0; j < w; j++ {
			var a int
			Fscan(rd,&a)
			if i == 0 && j == 0 {
				tmp0[0] = a
				continue
			}
			if i > 0 {
				if dp0[j] > a {
					tmp0[j] = dp0[j] + a
					if dp1[j] > a {
						tmp1[j] = dp1[j] + a
					}
				} else if dp1[j] > a {
					tmp1[j] = max(dp0[j], dp1[j]+a)
				} else {
					tmp1[j] = dp0[j]
				}
			}
			if j > 0 {
				if tmp0[j-1] > a {
					tmp0[j] = max(tmp0[j], tmp0[j-1]+a)
					if tmp1[j-1] > a {
						tmp1[j] = max(tmp1[j], tmp1[j]+a)
					}
				} else if tmp1[j-1] > a {
					tmp1[j] = max(tmp1[j], tmp0[j-1], tmp1[j-1]+a)
				} else {
					tmp1[j] = max(tmp1[j], tmp0[j-1])
				}
			}
			if i+1==h&&j+1==w {
				if tmp0[j] > a || tmp1[j] > a {
					Println("Yes")
				} else {
					Println("No")
				}
			}
		}
		dp0, dp1 = tmp0, tmp1
	}
	
}