백준 11650번 - C++

#include <bits/stdc++.h>
using namespace std;
pair<int, int> p[100004];

#define X first
#define Y second
int n, a, b;
int main(void) {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> n;
	for (int i = 0; i < n; i++) {
		cin >> p[i].X>>p[i].Y;
	}
	sort(p, p + n);

	for (int i = 0; i < n; i++) cout << p[i].X << ' ' <<p[i].Y << '\n';

}