#include <fstream>
using namespace std;
ifstream f("flip.in");
ofstream g("flip.out");
int i,j,s1,s2,n, m, a[16][16];
long long s;
int main()
{
    f>>n>>m;
    for(i=1;i<=n;i++)
        for(j=1;j<=m;j++)
        f>>a[i][j];
    for (i=1;i<=n;i++)
    {s1=0;s2=0;
    for(j=1;j<=m;j++)
        {
            s1=s1+a[i][j];
            s2=s2-a[i][j];
        }
        if (s2>s1)
            s=s+s2;
            else
                s=s+s1;
    }
    for (i=1;i<=m;i++)
    {s1=s2=0;
      for(j=1;j<=n;j++)
    {s1=s1+a[j][i];
    s2=s2-a[j][i];}

    if (s2>s1)
        s=s+s2;
        else
            s=s+s1;
    }
    f.close();
    g.close();
    return 0;
}