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Cod sursa(job #673203)
using namespace std;
#include<fstream>
int main()
{
ifstream fcin("flip.in");
ofstream fcout("flip.out");
long long a[17][17],suma=0,s=0,suma2=0,i,j,N,M;
fcin>>N>>M;
for(i=1;i<=N;i++)
for(j=1;j<=M;j++)
fcin>>a[i][j];
for(i=1;i<=N;i++)
{
s=0;
for(j=1;j<=M;j++)
s+=a[i][j];
if (s<0)
for(j=1;j<=M;j++)
a[i][j]*=-1;
}
for(j=1;j<=M;j++)
{
s=0;
for(i=1;i<=N;i++)
s+=a[i][j];
if (s<0)
s*=-1;
suma2+=s;
}
if(suma2>suma)
fcout<<suma2;
else
fcout<<suma;
fcin.close();
fcout.close();
return 0;
}