#include <stdio.h>

int N,M,a[17][17],i,j,Sum,Sum_Max,Sum_Total;

int main()
{
    freopen("filip.in","r",stdin);
    freopen("filip.out","w",stdout);

    Sum_Max=0;

    scanf("%d %d",&N,&M);

    for(i=0;i<N;i++){
        Sum=0;
        for(j=0;j<M;j++){
            scanf("%d",&a[i][j]);
            Sum_Total+=a[i][j];
            Sum+=a[i][j];
        }
        if(Sum<0)
            Sum_Max+=(-1)*Sum;
        else Sum_Max+=Sum;
    }
    for(j=0;j<M;j++){
        Sum=0;
        for(i=0;i<N;i++)
            Sum+=a[i][j];
        if(Sum<0)
               Sum_Max+=(-1)*Sum;
        else Sum_Max+=Sum;
    }

    Sum_Max=Sum_Max-Sum_Total;

    printf("%d",Sum_Max);
    return 0;
}