import sys

int1 = lambda x: int(x) - 1

# input = lambda: sys.stdin.buffer.readline()
input = lambda: sys.stdin.readline().rstrip()
ii = lambda: int(input())
i1 = lambda: int1(input())
mi = lambda: map(int, input().split())
mi1 = lambda: map(int1, input().split())
li = lambda: list(mi())
li1 = lambda: list(mi1())
lli = lambda n: [li() for _ in range(n)]

INF = float("inf")
mod = int(1e9 + 7)
# mod = 998244353


def chmax(arr, i, v):
    if arr[i] < v:
        arr[i] = v


h, w = mi()
a = [li() for _ in range(h)]
dp = [[[0] * w for i in range(h)] for k in range(2)]
dp[0][0][0] = a[0][0]
for k in range(2):
    for i in range(h):
        for j in range(w):
            if i + 1 < h:
                if k == 0 and (i + 1 != h - 1 or j != w - 1):
                    chmax(dp[1][i + 1], j, dp[k][i][j])
                if a[i + 1][j] < dp[k][i][j]:
                    chmax(dp[k][i + 1], j, dp[k][i][j] + a[i + 1][j])
            if j + 1 < w:
                if k == 0 and (i != h - 1 or j + 1 != w - 1):
                    chmax(dp[1][i], j + 1, dp[k][i][j])
                if a[i][j + 1] < dp[k][i][j]:
                    chmax(dp[k][i], j + 1, dp[k][i][j] + a[i][j + 1])
print("Yes" if 0 < max(dp[0][-1][-1], dp[1][-1][-1]) else "No")