gigel

import java.util.Random;
import java.util.Scanner;



class elem{
    public int val;
    public double pondere;

    elem(int v, double p){
        val = v;
        pondere = p;
    }

}

public class Mediana {

    static elem[] v;

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();

        v = new elem[n];

        for (int i = 0; i < v.length; i++) {
            v[i] = new elem(sc.nextInt(), sc.nextDouble());
        }

        System.out.println(Divide(0, v.length - 1, 0, 0));



    }

    public static int Divide(int st, int dr, double Wst, double Wdr){

        if(st == dr){
            return v[st].val;
        }
        Random rd = new Random();
        int pivot = rd.nextInt(dr - st + 1);
        pivot += st;

        double Ws = 0;
        double Wd = 0;

        for(int i = st; i <= dr; i++){
            if(i == pivot)
                continue;
            if(v[i].val < v[pivot].val){
                Ws += v[i].pondere;
            } else {
                Wd += v[i].pondere;
            }
        }
        Ws += Wst;
        Wd += Wdr;

        if(Ws <= 0.5 && Wd <= 0.5){
            return v[pivot].val;
        }

        else {
            if(Ws > Wd){
                return Divide(st, pivot - 1, Wst, Wd + v[pivot].pondere);
            } else {
                return Divide(pivot + 1, dr, Ws + v[pivot].pondere, Wdr);
            }
        }

    }