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Cod sursa(job #29019)
#include<fstream.h>
#include<math.h>
void main()
{ int n,m,s=0,a[16][16],sp=0,sn=0,sp1=100,sn1=0,i,j,k,l;
ifstream f("flip.in");
ofstream g("flip.out");
f>>n>>m;
for(i=1;i<=n;i++)
for(j=1;j<=n;j++)
f>>a[i][j];
for(i=1;i<=n;i++)
{if(sn1<sn&&sp1<sp) {k=i-1;sp=sp1;sn=sn1;}
sn1=0;sp1=0;
for(j=1;j<=m;j++)
if(a>0) sp+=a[i][j];
else sn+=a[i][j];
}
for(i=1;i<=n;i++)
a[k][i]=a[k][i]*(-1);
sn1=0;sp1=100;
for(j=1;j<=m;j++)
{if(sn1<sn&&sp1<sp) {k=j-1;sp=sp1;sn=sn1;}
sn1=0;sp1=0;
for(i=1;i<=m;i++)
if(a>0) sp+=a[i][j];
else sn+=a[i][j];
}
for(i=1;i<=n;i++)
a[i][k]=a[i][k]*(-1);
for(i=1;i<=n;i++)
for(j=1;j<=n;j++)
s+=a[i][j];
g<<s;
f.close();
g.close();
}