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#include <fstream>
using namespace std;
int main()
{
ifstream fin("flip.in");
ofstream fout("flip.out");
int N,M,a[17][17],S=0,S1,S0=0,i,j,k;
fin>>N>>M;
for(i=1; i<=N; i++)
for(j=1; j<=M; j++)
fin>>a[i][j];
for(i=1; i<=N; i++)
for(j=1; j<=M; j++)
S0+=a[i][j];
for(i=1; i<=N; i++)
{
S1=0;
for(j=1; j<=M; j++)
S1+=a[i][j];
if(S1<0)
S1*=-1;
S+=S1;
}
for(j=1; j<=M; j++)
{
S1=0;
for(i=1; i<=N; i++)
S1+=a[i][j];
if(S1<0)
S1*=-1;
S+=S1;
}
fout<<S-S0;
return 0;
}