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Cod sursa(job #790532)
#include <fstream>
using namespace std;
ifstream f("flip.in");
ofstream g("flip.out");
int main()
{int a[50][50],n,m,i,j,suma1,suma2;
f>>n>>m;
for(i=0;i<n;i++)
for(j=0;j<m;j++)
f>>a[i][j];
for(i=0;i<n;i++)
{suma1=suma2=0;
for(j=0;j<m;j++)
{suma1+=a[i][j];
suma2+=a[i][j]*(-1);}
if(suma2>suma1)
for(j=0;j<n;j++)
a[i][j]=a[i][j]*(-1);}
for(i=0;i<m;i++)
{suma1=suma2=0;
for(j=0;j<n;j++)
{suma1+=a[j][i];
suma2+=a[j][i]*(-1);}
if(suma2>suma1)
for(j=0;j<n;j++)
a[j][i]=a[j][i]*(-1);}
suma1=suma2=0;
for(i=0;i<n;i++)
for(j=0;j<m;j++)
suma1+=a[i][j];
g<<suma1;
f.close();
g.close();
}