#include<iostream>
#include<cstring>
#include<vector>
#include<array>
#include<algorithm>
using namespace std;
using LL = long long;

int main(){

#ifdef LOCAL
    freopen("data.in", "r", stdin);
    freopen("data.out", "w", stdout);
#endif

    cin.tie(0);
    cout.tie(0);
    ios::sync_with_stdio(0);

    int n;
    cin >> n;
    vector<array<int, 2> > p(n);
    for(int i = 0; i < n; i++){
        int x, y;
        cin >> x >> y;
        p[i] = {x, y};
    }
    sort(p.begin(), p.end());
    for(int i = 0; i < n - 1; i++){
        cout << p[i][0] << ' ' << p[i][1] << '\n';
    }

}