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Cod sursa(job #866336)
#include <fstream>
using namespace std;
int main()
{
ifstream f("flip.in");
ofstream g("flip.out");
int n,m,i,j,s1,s2;
long long a[20][20];
f>>n>>m;
for(i=1;i<=n;i++)
{
s1=0;s2=0;
for(j=1;j<=m;j++)
{
f>>a[i][j];
if(a[i][j]<0)s1=s1+a[i][j];
else s2=s2+a[i][j];
}
//g<<s1<<" "<<s2<<endl;
if(s1*(-1)>s2)for(j=1;j<=m;j++)a[i][j]=a[i][j]*(-1);
}
for(j=1;j<=n;j++)
{
s1=0;s2=0;
for(i=1;i<=m;i++)
if(a[i][j]<0)s1=s1+a[i][j];
else s2=s2+a[i][j];
if(s1*(-1)>s2)for(i=1;i<=n;i++)a[i][j]=a[i][j]*(-1);
}
long long s=0;
for(i=1;i<=n;i++)
{
for(j=1;j<=m;j++)
{
g<<a[i][j]<<" ";s=s+a[i][j];
}
g<<endl;
}
g<<s;
return 0;
}