#include <set>
#include <iostream>
#include <fstream>
#include <vector>
using namespace std;

ifstream fin("heapuri.in");
ofstream fout("heapuri.out");

int main() {
    multiset <int> my_set;
    vector <int> my_vector;
    int n;

    fin >> n;
    int x;
    for (int i = 0; i < n; i++)
    {
        fin >> x;
        if (x == 3) {
            multiset <int>::iterator it = my_set.begin();
            fout << *it << "\n";
        } else if (x == 2) {
            fin >> x;
            if (my_set.begin() != my_set.end()) my_set.erase(my_vector[x-1]);
        } else {
            fin >> x;
            my_vector.push_back(x);
            my_set.insert(x);
        }
    }

    return 0;
}