#include <bits/stdc++.h>
using namespace std;
#define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
#define rep(i,n) REP(i,0,n)
#define FOR(it,c) for(__typeof((c).begin()) it=(c).begin(); it!=(c).end(); ++it)
#define ALLOF(c) (c).begin(), (c).end()
typedef long long ll;
typedef unsigned long long ull;

struct F {
  bool flg;
  int a, b;
  F(int x, int y){
    if(x >= 0) flg = true;
    else flg = false;
    a = abs(x);
    b = y;
  }
};
bool operator<(const F& x, const F& y){
  if(x.flg != y.flg){
    if(x.flg) return false;
    else return true;
  }
  if(x.flg) return x.a * y.b < y.a * x.b;
  return x.a * y.b > y.a * x.b;
}

int main(){
  int n;
  cin >> n;
  vector<F> v;
  rep(i,n){
    int a, b;
    cin >> a >> b;
    v.emplace_back(a, b);
  }
  sort(ALLOF(v));
  reverse(ALLOF(v));
  
  rep(i,v.size()){
    int a = v[i].a;
    if(!v[i].flg) a *= -1;
    int b = v[i].b;
    
    cout << a << " " << b << endl;
  }
  
  return 0;
}