#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pll = pair<ll, ll>;
#define drep(i, cc, n) for (ll i = (cc); i <= (n); ++i)
#define rep(i, n) drep(i, 0, n - 1)
#define all(a) (a).begin(), (a).end()
#define pb push_back
#define fi first
#define se second

const ll MOD = 1000000007;
const ll MOD2 = 998244353;
const ll INF = 1LL << 60;
const ll MAX_H = 500;
const ll MAX_W = 500;

ll dp[MAX_H][MAX_W][2];
int main(){
    ll h, w;
    cin >> h >> w;

    vector<vector<ll>> a(h, vector<ll>(w));
    rep(i, h) rep(j, w) cin >> a[i][j];

    //初期化
    dp[0][0][0] = a[0][0];
    for(ll j=1; j<w; j++){
        if(dp[0][j-1][1] == -INF) dp[0][j][1] = -INF;
        else if(dp[0][j-1][1] > a[0][j]){
            dp[0][j][1] = max(dp[0][j][1], dp[0][j-1][1] + a[0][j]);
        }else{
            dp[0][j][1] = -INF;
        }

        if(dp[0][j-1][0] == -INF) dp[0][j][0] = -INF;
        else if(dp[0][j-1][0] > a[0][j]){
            dp[0][j][0] = dp[0][j-1][0] + a[0][j];
        }else{
            dp[0][j][0] = -INF;
            dp[0][j][1] = max(dp[0][j][1], dp[0][j-1][0]);
        }
    }

    for(ll i=1; i<h; i++){
        if(dp[i-1][0][1] == -INF) dp[i][0][1] = -INF;
        else if(dp[i-1][0][1] > a[i][0]){
            dp[i][0][1] = max(dp[i][0][1], dp[i-1][0][1] + a[i][0]);
        }else{
            dp[i][0][1] = -INF;
        }

        if(dp[i-1][0][0] == -INF) dp[i][0][0] = -INF;
        else if(dp[i-1][0][0] > a[i][0]){
            dp[i][0][0] = dp[i-1][0][0] + a[i][0];
        }else{
            dp[i][0][0] = -INF;
            dp[i][0][1] = max(dp[i][0][1], dp[i-1][0][0]);
        }
    }

    //遷移
    for(ll i=1; i<h; i++) for(ll j=1; j<w; j++){
        if(i == h-1 && j == w-1) break;
        ll max1 = max(dp[i-1][j][1], dp[i][j-1][1]);
        if(max1 == -INF){
            dp[i][j][1] = -INF;
        }else if(max1 > a[i][j]){
            dp[i][j][1] = max(max1 + a[i][j], dp[i][j][1]);
        }else{
            dp[i][j][1] = -INF;
        }

        ll max0 = max(dp[i-1][j][0], dp[i][j-1][0]);
        if(max0 == -INF) dp[i][j][0] = -INF;
        else if(max0 > a[i][j]){
            dp[i][j][0] = max0 + a[i][j];
        }else{
            dp[i][j][0] = -INF;
            dp[i][j][1] = max(dp[i][j][1], max0);
        }
    }

    ll M = -INF;
    rep(k, 2){
        M = max(dp[h-2][w-1][k], M);
        M = max(dp[h-1][w-2][k], M);
    }

    if(M > a[h-1][w-1]) cout << "Yes" << endl;
    else cout << "No" << endl;
}