#include <algorithm>
#include <iostream>
#include <vector>
using namespace std;

struct Point {int x, y;};
bool operator < (Point const & a, Point const & b) {
    if (a.y != b.y) return a.y > b.y;
    return a.x < b.x;
}

int main () {
    int n;  cin >> n;
    vector <Point> a (n);
    for (auto & [x, y] : a)  // C++17
        cin >> x >> y;
    sort (a.begin (), a.end ());
    for (auto [x, y] : a)  // C++17
        cout << x << " " << y << endl;
    return 0;
}