using namespace std;
# include <iostream>
# include <fstream>
ifstream fin("flip.in");
ofstream fout("flip.out");
int a[100][20],n,m;
int main()
{int i,j,s,s1,s2,S;
fin>>n;
fin>>m;
for(i=1;i<=n;i++)
	for(j=1;j<=m;j++)
		fin>>a[i][j];
s1=0;
s2=0;
s=0;
for(i=1;i<=n;i++)
{	for(j=1;j<=m;j++)
	{ s1=a[i][j]*(-1)+s1;
	s2=a[i][j]+s2;
	}
	if(s1>s2)
		s=s+s1;
	else
		s=s+s2;
	s1=0;
s2=0;
}
s1=0;
s2=0;
S=0;
for(j=1;j<=m;j++)
{	for(i=1;i<=n;i++)
{ s1=a[i][j]*(-1)+s1;
s2=a[i][j]+s2;
}
if(s1>s2)
	S=S+s1;
else
	S=S+s2;
s1=0;
s2=0;
}
if(s>S)
	fout<<s;
else fout<<S;
}