#include <fstream>

using namespace std;

int main()
{
    ifstream fin("flip.in");
    ofstream fout("flip.out");
    int N,M,a[17][17],S=0,S1,i,j;
    fin>>N>>M;
    for(i=1;i<=N;i++)
        for(j=1;j<=M;j++)
        fin>>a[i][j];
        for(i=1;i<=N;i++)
        {
            S1=0;
            for(j=1;j<=M;j++)
                S1+=a[i][j];
            if(S1<0)
                S1*=-1;
            S+=S1;
        }
        for(j=1;j<=M;j++)
        {
            S1=0;
            for(i=1;i<=N;i++)
                S1+=a[i][j];
            if(S1<0)
                S1*=-1;
            S+=S1;
        }
        fout<<S;
        return 0;




}