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#include<iostream>
#include<fstream>
using namespace std;
int main()
{
int i,j,m,n,s1=0,k=0,a[100][100],v[100];
cin>>n>>m;
for(i=1;i<=n;i++)
for(j=1;j<=m;j++)
cin>>a[i][j];
for(i=1;i<=n;i++)
{
for(j=1;j<=m;j++)
s1=s1+a[i][j];
if(s1*(-1)>s1)
{
k++;
v[k]=s1*(-1);
}
else
{
k++;
v[k]=s1;
}
s1=0;
}
for(j=1;j<=m;j++)
{
for(i=1;i<=n;i++)
s1=s1+a[i][j];
if(s1*(-1)>s1)
{
k++;
v[k]=s1*(-1);
}
else
{
k++;
v[k]=s1;
}
s1=0;
}
for(i=1;i<=k;i++)
s1=s1+v[k];
cout<<s1;
return 0;
}