좌표 정렬하기 2

#include <algorithm>
#include <iostream>
#include <stdio.h>
#include <vector>
using namespace std;
int main() {
	//freopen("input.txt", "rt", stdin);
	int n;
	scanf("%d", &n);
	vector<pair<int, int> > p;
	int a, b;
	for (int i = 0; i < n; i++) {
		scanf("%d %d", &b, &a);
		p.push_back(make_pair(a, b));
	}
	sort(p.begin(), p.end());
	for (int i = 0; i < n; i++) {
		printf("%d %d\n", p[i].second, p[i].first);
	}

	return 0;
}