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Cod sursa(job #639921)
#include <cstdio>
using namespace std;
int n,m;
int a[20][20];
int col[20],line[20];
int b[20][20];
int s;
void citire()
{
freopen("flip.in","r",stdin);
scanf("%d %d", &n,&m);
for(int i=1;i<=n;i++)
{
for(int j=1;j<=m;j++)
{
scanf("%d",&a[i][j]);
col[j]+=a[i][j];
line[i]+=a[i][j];
}
}
}
int minimal(int x[], int p)
{
int minimum=1000001;
int f=-1;
for(int k=1;k<=p;++k)
{
if(minimum>x[k])
{
minimum=x[k];
f=k;
}
}
return f;
}
void comutare()
{
int l1=minimal(line,n),c2 = minimal(col,m);
for(int i=1;i<=n;i++)
{
for(int j=1;j<=m;++j)
{
if( i == l1 || j == c2)
{
b[i][j]=a[i][j]*(-1);
s+=b[i][j];
}
else
{
b[i][j]=a[i][j];
s+=b[i][j];
}
}
}
}
void afisare()
{
for(int i=1;i<=n;i++)
{
for(int j=1;j<=m;j++)
{
printf("%3d",b[i][j]);
}
printf("\n");
}
}
int main()
{
freopen("flip.out","w",stdout);
citire();
comutare();
//afisare();
printf("%d\n",s);
return 0;
}