#include<iostream>
#include<cstdio>
#include<cstdlib>
#include<ctime>
#include<vector>
#include<string>
#include<algorithm>
#include<utility>
#include<map>
#include<set>
#include<queue>
#include<sstream>
#include<fstream>
#include<cmath>
#include<list>
#include<deque>
#include<stack>
#include<bitset>
#include<numeric>
#include<iomanip>
#include<memory.h>
#include<cassert>
using namespace std;
typedef long long LL;
const double EPS = 1e-8;
struct diag
{
	pair<int, int> a, b;
	pair<double, double> cent;
	LL len;
	diag(pair<int, int> aa, pair<int, int> bb)
	{
		a = aa;
		b = bb;
		cent = make_pair((a.first + b.first) / 2., (a.second + b.second) / 2.);
		len = (a.first - b.first) * (a.first - b.first) + (a.second - b.second) * (a.second - b.second);
	}
};
vector<diag> diags;
vector<pair<int, int> > pnts;
int main()
{
    int n;
	cin >> n;
	for(int i = 0; i < n; i++)
	{
		int a, b;
		cin >> a >> b;
	}
	for(int i = 0; i < n; i++)
		for(int j = i + 1; j < n; j++)
			diags.push_back(diag(pnts[i], pnts[j]));

	return 0;
}