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Cod sursa(job #256802)
#include<fstream.h>
int main()
{
int n,m,i,j;
long a[18][18],s,p=0;
ifstream f("flip.in");
ofstream g("flip.out");
f>>n>>m;
for(i=1;i<=n;i++)
{
s=0;
for(j=1;j<=m;j++)
{
f>>a[i][j];
s=s+a[i][j];
}
a[i][0]=s;
p=p+s;
}
for(j=1;j<=m;j++)
{
s=0;
for(i=1;i<=n;i++)
s=s+a[i][j];
a[0][j]=s;
}
for(i=1;i<=n;i++)
if(a[i][0]<0)
p=p-2*a[i][0];
for(j=1;j<=m;j++)
if(a[0][j]<0)
p=p-2*a[0][j];
g<<p;
f.close();
g.close();
return 0;
}