#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
//const long nPrime = 1000000007;
//const long nPrime = 998244353;
typedef long long ll;
int main() {
    ll h,w;
    cin >> h >> w;
    vector<vector<vector<ll>>> vvviDP(h+1,vector<vector<ll>>(w+1,vector<ll>(2,0)));
    ll ahw;
    for(ll i = 1; i <= h; i++){
        for(ll j = 1; j <= w; j++){
            ll a;
            cin >> a;
            if(i == 1 && j == 1){
                vvviDP[i][j][0] = a;
                continue;
            } 
            if(i == h && j == w){
                ahw = a;
            }
            if(vvviDP[i][j-1][0] > a){
                vvviDP[i][j][0] = max(vvviDP[i][j][0], vvviDP[i][j-1][0]+a);
            } else {
                vvviDP[i][j][1] = max(vvviDP[i][j][1], vvviDP[i][j-1][0]);
            }
            if(vvviDP[i][j-1][1] > a){
                vvviDP[i][j][1] = max(vvviDP[i][j][1], vvviDP[i][j-1][1]+a);
            }
            
            if(vvviDP[i-1][j][0] > a){
                vvviDP[i][j][0] = max(vvviDP[i][j][0], vvviDP[i-1][j][0]+a);
            } else {
                vvviDP[i][j][1] = max(vvviDP[i][j][1], vvviDP[i-1][j][0]);
            }
            if(vvviDP[i-1][j][1] > a){
                vvviDP[i][j][1] = max(vvviDP[i][j][1], vvviDP[i-1][j][1]+a);
            }
        }
    }
    if(vvviDP[h][w][0] > ahw || vvviDP[h][w][1] > ahw){
        cout << "Yes" << endl;
    }else {
        cout << "No" << endl;
    }
    return 0;
}