#include<iostream>
#include<algorithm>

using namespace std;

struct Student {
	int id;
	int score;
}s[110];

bool cmp(Student s1, Student s2) {
	if (s1.score != s2.score)
		return s1.score < s2.score;
	return s1.id < s2.id;
}

int main() {
	
	int n;
	cin >> n;
	
	for (int i = 0; i < n; i ++ ) cin >> s[i].id >> s[i].score;
	
	sort(s, s + n, cmp);
	
	for (int i = 0; i < n; i ++ ) 
	    cout << s[i].id << ' ' << s[i].score << endl;

	return 0;
}