#include <fstream>

using namespace std;
ifstream f("flip.in");
ofstream g("flip.out");
long long n,m,i,j,a[18][18],s,i2,j2,s1,mx;
int main()
{
    f >> n >> m;
    for(i = 1; i <= n; i++)
        for(j = 1; j <= m; j++){
            f >> a[i][j];
            s += a[i][j];
    }
    for(i = 1; i <= n; i++){

        for(j = 1; j <= m; j++){
            s1 = s;
            for(i2 = 1; i2 <= n ; i2++){
                s1 -= 2*a[i2][j];
            }
            for(j2 = 1; j2 <= m ; j2++){
                s1 -= 2*a[i][j2];
            }
            s1 += 4*a[i][j];
            if(s1 > mx){
                mx = s1;
            }
        }
    }
    g<<mx;

    return 0;
}