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Cod sursa(job #582231)
# include <fstream.h>
ifstream f("flip.in");
ofstream g("flip.out");
int n,m,i,j,v[18][18];
long s;
int main()
{
f>>n>>m;
for(i=1;i<=n;i++)
for(j=1;j<=m;j++)
f>>v[i][j],v[i][0]+=v[i][j],v[0][j]+=v[i][j];
for(i=1;i<=n;i++)
for(j=1;j<=m;j++)
if(v[i][0]<0||v[0][j]<0)
s-=v[i][j];
else
s+=v[i][j];
g<<s<<'\n';
f.close();
g.close();
return 0;
}