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#include <iostream>
#include <fstream>
using namespace std;
int main()
{ifstream g("flip.in");
ofstream f("flip.out");
long long a[100][100],i,j,s=0,n,m,maxx=0,maxn=0,v[100],maxn2,s1=0,st=0;
g>>n>>m;
for(i=1;i<=n;i++)
for(j=1;j<=m;j++)
g>>a[i][j];
for(i=1;i<=n;i++)
{s=0;
s1=0;
for(j=1;j<=m;j++)
{s=s+a[i][j]*(-1);
s1=s1+a[i][j];}
if(s1<s)
{for(j=1;j<=m;j++)
a[i][j]=0;
st=st+s;}}
for(j=1;j<=m;j++)
{s=0;
s1=0;
for(i=1;i<=n;i++)
{s=s+a[i][j]*(-1);
s1=s1+a[i][j];}
if(s1<s)
{for(i=1;i<=n;i++)
a[i][j]=0;
st=st+s;}}
for(i=1;i<=n;i++)
for(j=1;j<=m;j++)
st=st+a[i][j];
f<<st;
}