#include<stdio.h>
#define NMAX 20
#define INF 1<<32
long long int A[NMAX][NMAX],L[NMAX],C[NMAX],S,N,M,MAX=0-INF;
void deschidere()
{
	freopen("flip.in","r",stdin);
	freopen("flip.out","w",stdout);
}
void citire()
{
	scanf("%lld%lld",&N,&M);
	for(int i = 0 ; i < N ; i++)
		for(int j = 0 ; j < M ; j++)
		{
			scanf("%lld",&A[i][j]);
			S+=A[i][j],C[j]+=A[i][j],L[i]+=A[i][j];
		}
}
void rezolva()
{
	for(int i = 0 ; i < N; i++)
		for(int j = 0 ; j < M;j++)
			if(S - (2*L[i]) - (2*C[j]) > MAX )
				MAX = S - (2*L[i]) - (2*C[j]);
	printf("%lld",MAX);
}
int main()
{
	deschidere();
	citire();
	rezolva();
	return 0;
}