#include<bits/stdc++.h>
using namespace std;

class Diem{
	private:
		int x,y;
	public:
		Diem(){
			x=y=0;
			}
			Diem(int a,int b){
				x=a;
				y=b;
				}
				void nhap(){
					cout<<"hoanh do la";cin>>x;
					cout<<"tung do la :";cin>>y;
					}
				friend istream &operator>>(istream &in,Diem &a);
				friend ostream &operator<<(ostream &out,Diem &a);
				 double kc();

};

istream &operator>>(istream &in,Diem &a){
	cout<<"hoanh do la :";in>>a.x;
	cout<<"tung do la:";in>>a.y;
	return in;
	}
	ostream &operator<<(ostream &out,Diem &a){
		out<<"("<<a.x<<","<<a.y<<")";
		return out;
		}
	double Diem::kc(){
			return sqrt(x*x+y*y);
			}
int main()
{
int n;
Diem *a;
cout<<"nhap n diem:";cin>>n;
a=new Diem[n+1];
for(int i=1;i<=n;i++){
	cout<<"nhap diem thu "<<i<<":";
	a[i].nhap();
	}

	int max=a[1].kc();
	for(int i=2;i<=n;i++){
		if(max<a[i].kc()) max=a[i].kc();
}
cout<<"cac diem xa goc toa dom nhat ";
for(int i=1;i<=n;i++){
	if(max==a[i].kc())  cout<<a[i];
	}
}