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Cod sursa(job #2000)
#include <fstream.h>
int main()
{ int n,m,i,j;
long int a[100][100],s=0,s2=0;
ifstream fin("flip.in");
fin>>n>>m;
fin.close();
for(i=1;i<=n;i++)
for(j=1;j<=m;j++)
{
fin>>a[i][j];
}
for(j=1;j<=m;j++)
{ for(i=1;i<=n;i++)
{
s+=a[i][j];
s2-=a[i][j];
}
if (s2>=s)
for(i=1;i<=n;i++)
{
a[i][j]=-1*a[i][j];
}
s=s2=0;
}
for(i=1;i<=n;i++)
{
for(j=1;j<=m;j++)
{
s+=a[i][j];
s2-=a[i][j];
}
if (s2>=s)
for(j=1;j<=m;j++)
{
a[i][j]=-1*a[i][j];
}
s=s2=0;
}
for(i=1;i<=n;i++)
for(j=1;j<=m;j++)
{
s+=a[i][j];
}
ofstream fout("flip.out");
fout<<s;
fout.close();
return 0;
}