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Cod sursa(job #284269)
#include <fstream.h>
int main()
{
ifstream f("flip.in");
ofstream g("flip.out");
int a[100][100],s,max=0,j,i,m,n,x;
f>>n>>m;
for(i=1;i<=n;i++){s=0;
for(j=1;j<=m;j++){
f>>x;
a[i][j]=x;
s+=x;
}
if(s<0)
for(j=1;j<=m;j++)a[i][j]=-a[i][j];}
for(i=1;i<=m;i++){s=0;
for(j=1;j<=n;j++)
s+=a[j][i];
if(s>=0)max+=s;
else
max+=-s;
}
g<<max;
f.close();
g.close();
return 0;
}