#include <iostream>
#include <fstream>
#include <set>
#define N 200005
#include <vector>
using namespace std;
ifstream f("heapuri.in");
ofstream g("heapuri.out");
int n,nr,x,cod;
multiset <int> my_set;
vector <int> ord(N);

int main()
{
    f >> nr;
    while (nr)
    {
        f >> cod;
        if (cod == 1)
        {
            f >> x;
            ord[++n] = x;
            my_set.insert(x);
        }
        else if (cod == 2)
        {
            f >> x;
            my_set.erase(ord[x]);
        }
        else
        {
            multiset <int> :: iterator minim = my_set.begin();
            g << *minim <<'\n';
        }
        nr--;
    }
    return 0;
}