Revise paste Untitled

#include <iostream>
using namespace std;
int main() {
    int n, m;
    cin >> n >> m;
    int mat[n][m];
    for(int i = 0; i < n; i++) {
        for(int j = 0; j < m; j++) {
            cin >> mat[i][j];
        }
    }
    int x1, y1;
    cin >> x1 >> y1;
    
    int x2, y2;
    cin >> x2 >> y2;
    
    int zbir1 = 0;
    if(x1 - 1 >= 0) { // postoi gorniot sosed
        zbir1 += mat[x1 - 1][y1];
    }
    if(x1 + 1 < n) { // postoi dolniot sosed
        zbir1 += mat[x1 + 1][y1];
    }
    if(y1 - 1 >= 0) { // postoi leviot sosed
        zbir1 += mat[x1][y1 - 1];
    }
    if(y1 + 1 < m)  { // postoi desniot sosed
        zbir1 += mat[x1][y1 + 1];
    }
    
    int zbir2 = 0;
    if(x2 - 1 >= 0) { // postoi gorniot sosed
        zbir2 += mat[x2 - 1][y2];
    }
    if(x2 + 1 < n) { // postoi dolniot sosed
        zbir2 += mat[x2 + 1][y2];
    }
    if(y2 - 1 >= 0) { // postoi leviot sosed
        zbir2 += mat[x2][y2 - 1];
    }
    if(y2 + 1 < m) {
        zbir2 += mat[x2][y2 + 1];
    }
    
    if(zbir1 > zbir2) {
        cout << "Poleto so indeks: (" << x1 << "," << y1 << ") ima pogolem zbir na sosedi" << endl;
    }
    else {
        cout << "Poleto so indeks: (" << x2 << "," << y2 << ") ima pogolem zbir na sosedi" << endl;
    }
    return 0;
}