#include<iostream>
#include<fstream>
using namespace std;
ifstream in("flip.in");
ofstream out("flip.out");
int a[20][20], b[20][20], n, m;
long maxx=-1000000;
void citire()
{
	in>>n>>m;
	for(int i=1; i<=n; i++)
		for(int j=1; j<=m; j++)
		{
			in>>a[i][j];
			b[i][j]=a[i][j];
		}
}
int main()
{
	citire();
	int s, sum1=0, sum2=0;
	for(int i=1; i<=n; i++)
	{
		s=0;
		for(int j=1; j<=m; j++)
			s=s+a[i][j];
		if(s<0)
			sum1=sum1-s;
		else
			sum1=sum1+s;
	}
	sum1=0;
	for(int i=1; i<=n; i++)
	{
		s=0;
		for(int j=1; j<=m; j++)
			s=s+a[j][i];
		if(s<0)
			sum2=sum2-s;
		else
			sum2=sum2+s;
	}
	if(sum1>sum2)
		out<<sum1;
	else
		out<<sum2;
}