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#include <fstream>
using namespace std;
void citire(int &n,int &m,int flip[17][17])
{
int i,j;
ifstream fin("flip.in");
fin>>n>>m;
for(i=1;i<=n;i++)
for(j=1;j<=m;j++)
fin>>flip[i][j];
fin.close();
}
int main()
{
int n,m,flip[17][17],i,j,s,s_min_linie=1000000,s_min_coloana=1000000,imin,jmin,p=-1;
citire(n,m,flip);
for(i=1;i<=n;i++)
{
s=0;
for(j=1;j<=m;j++)
s+=flip[i][j];
if(s<s_min_linie)
{
s_min_linie=s;
imin=i;
}
}
for(j=1;j<=m;j++)
{
s=0;
for(i=1;i<=n;i++)
s+=flip[i][j];
if(s<s_min_coloana)
{
s_min_coloana=s;
jmin=j;
}
}
for(j=1;j<=m;j++)
flip[imin][j]=flip[imin][j]*p;
for(i=1;i<=n;i++)
flip[i][jmin]=flip[i][jmin]*p;
s=0;
for(i=1;i<=n;i++)
for(j=1;j<=m;j++)
s+=flip[i][j];
ofstream fout("flip.out");
fout<<s;
fout.close();
return 0;
}