#include<fstream.h>
int main()
{
int l,c,i,j,s1,s2,s3,a[16][16];
ifstream in("flip.in");
ofstream out("flip.out");
in>>l>>c;
for(i=1;i<=l;i++)
{
s1=s2=0;
for(j=1;j<=c;j++)
{
in>>a[i][j];
s1=s1+a[i][j];
s2=s2+a[i][j]*-1;
};
if(s2>s1)
for(j=1;j<=c;j++)
{
a[i][j]=a[i][j]*-1;
};
};
for(j=1;i<=l;i++)
{
s1=s2=0;
for(i=1;j<=c;j++)
{
s1=s1+a[i][j];
s2=s2+a[i][j]*-1;
};
if(s2>s1)
for(i=1;j<=l;j++)
{
a[i][j]=a[i][j]*-1;
};
};
s3=0;
for(i=1,i<=l,i++)
for(j=1,j<=c,j++)
s3=s3+a[i][j];
}