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#include <iostream>
#include <fstream>
using namespace std;
ifstream f("flip.in");
ofstream g("flip.out");
int main()
{
int v[16][16],n,m;
f>>n;
f>>m;
for(int i=0;i<n;i++)
for(int j=0;j<m;j++)
f>>v[i][j];
for(int i=0;i<n;i++)
{cout<<"\n";
for(int j=0;j<m;j++)
cout<<v[i][j]<<" ";
}
/*for(int i=0;i<n;i++)
for(int j=0;j<m;j++)
v[i][j]=v[i][j]*(-1);*/
unsigned s=0;
for(int i=0;i<n;i++)
for(int j=0;j<m;j++)
if(v[i][j]>=0)
s=s+v[i][j];
g<<s;
f.close();
g.close();
return 0;
}