#include<bits/stdc++.h>
using namespace std;
#include<atcoder/all>
using namespace atcoder;
using mint = modint998244353;
int main () {
	int N;
	cin >> N;
	std::vector<int> X(N), Y(N);
	for (int i = 0; i < N; i ++) cin >> X[i]>> Y[i];
	auto P = X;
	auto Q = Y;
	sort(P.begin(), P.end());
	P.erase(unique(P.begin(), P.end()), P.end());
	sort(Q.begin(), Q.end());
	Q.erase(unique(Q.begin(), Q.end()), Q.end());
	
}