#include<fstream>
using namespace std;
ifstream fin("date.in");
ofstream fout("date.out");
struct punct {float x,y;};
void citire(punct &p)
{
fin>>p.x>>p.y;
}
void afisare(punct p)
{
fout<<"("<<p.x<<","<<p.y<<") ";
}
int main()
{
int n,i;
punct a[100];
fin>>n;
for(i=1;i<=n;i++) citire(a[i]);
fout<<"cadranul I: ";
for(i=1;i<=n;i++) if(a[i].x>0 && a[i].y>0) afisare(a[i]);
fout<<"\ncadranul II: ";
for(i=1;i<=n;i++) if(a[i].x<0 && a[i].y>0) afisare(a[i]);
fout<<"\ncadranul III: ";
for(i=1;i<=n;i++) if(a[i].x<0 && a[i].y<0) afisare(a[i]);
fout<<"\ncadranul IV: ";
for(i=1;i<=n;i++) if(a[i].x>0 && a[i].y<0) afisare(a[i]);
fin.close();
fout.close();
return 0;
}
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