#include<stdio.h>
int main()
{
	freopen("date.in","r",stdin);
	freopen("date.out","w",stdout);
	int n,i,m,j,x,s1,s2,s=0;
	scanf("%d%d",&n,&m);
	for(i=1;i<=n;i++)
	{
		for(j=1;j<=m;j++)
		{
			s1=s2=0;
			scanf("%d",&x);
			s1=s1+x;
			s2=s2-x;
		}
		if(s1>=s2)
			s=s+s1;
		else
			s=s+s2;
	}
	for(i=1;i<=m;i++)
	{
		for(j=1;j<=n;j++)
		{
			s1=s2=0;
			scanf("%d",&x);
			s1=s1+x;
			s2=s2-x;
		}
		if(s1>=s2)
			s=s+s1;
		else
			s=s+s2;
	}
printf("%d\n",s);
return 0;
}