#include <iostream>
using namespace std;
#include <set>
#include <vector>
class mpair {
public:
	mpair() {};
	mpair(int a, int b) :a(a), b(b) {};
	int a;
	int b;
	friend istream& operator>>(istream& in,mpair& p) {
		in >> p.a >> p.b;
		return in;
	}
};
struct cmp {
	bool operator()(const mpair&p1, const mpair&p2) const{
		if (p1.a != p2.a) {
			if (p1.a < p2.a)
				return true;
			else
				return false;
		}
		else {
			if (p1.b > p2.b)
				return true;
			else
				return false;
		}
	}
};
void insert_vector(vector<mpair>&v, const mpair&p,int len) {
	int n = p.b;
	int count = 0;
	for (int i = 0; i < len; i++) {
		if (v[i].a == -1 && count < n) {
			count++;

		}
		else if (v[i].a == -1 && count == n){
			v[i] = p;
			break;
		}
		
	}
}
int main()
{
	int count ;
	vector<mpair>v;
	set<mpair, cmp>m_set;
	cin >> count;
	int n = 1;
	for (int i = 0; i < count; i++) {
		v.push_back(mpair(-1, 1));
	}

	mpair p;
	while (cin >> p) {
		m_set.insert(p);
	}
	for (auto it = m_set.begin(); it != m_set.end(); it++) {
		int a = it->b;
		insert_vector(v, *it, count);
	}
	cout << v[0].a << " " << v[0].b ;
	if (count > 1) {
		for (int i = 1; i < count; i++) {
			cout<<" "<< v[i].a << " " << v[i].b ;
		}
	}
	return 0;
}