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Cod sursa(job #568979)
#include<fstream>
using namespace std;
int matrice[17][17];
int main()
{int n,m,suma,d,j,i;
ifstream f1("flip.in");
ofstream f2("flip.out");
f1>>n>>m;
for(i=1;i<=n;i++)
{suma=0;
for(d=1;d<=m;d++)
{f1>>matrice[i][d];
suma=suma+matrice[i][d];
}
if(suma<-suma) for(j=1;j<=m;j++) matrice[i][j]=-matrice[i][j];
}
for(d=1;d<=m;d++)
{suma=0;
for(i=1;i<=n;i++)
{suma=suma+matrice[i][d];
}
if(suma<-suma) for(j=1;j<=n;j++) matrice[j][d]=-matrice[j][d];
}
suma=0;
for(i=1;i<=n;i++)
{for(d=1;d<=m;d++)
suma+=matrice[i][d];
}
f2<<suma;
return 0;
}