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#include <fstream>
#include <climits>
using namespace std;
ifstream f("flip.in");
ofstream g("flip.out");
int a[17][17],n,m,v[34],v1[34],ml=INT_MAX,mc=INT_MAX,op1,op2,s;
void citire()
{
f>>n>>m;
for(int i=1;i<=n;i++){
v[i]=0;
for(int j=1;j<=m;j++){
f>>a[i][j];
v[i]+=a[i][j];
}
}
}
int main()
{
citire();
for(int j=1;j<=m;j++){
v1[j]=0;
for(int i=1;i<=n;i++)
v1[j]+=a[i][j];
}
for(int i=1;i<=n;i++)
for(int j=1;j<=m;j++){
if(v[i]<ml)
ml=v[i],op1=ml*(-1);
else if(v1[j]<mc)
mc=v1[j],op2=mc*(-1);
}
for(int i=1;i<=n;i++)
s+=v[i];
if(mc<0 && ml<0)
s=s+2*op1+2*op2;
else if(mc>0 && ml>0)
s=s-2*op1-2*op2;
else if(mc<0 && ml>0)
s=s+2*op1-2*op2;
else s=s-2*op1+2*op2;
g<<s;
}