#include <iostream>
#include <fstream>
#include <vector>
#include <set>

using namespace std;

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

set<int> s;
int n;
vector<int> v;

int main()
{
    fin >> n;
    for (int i = 1; i <= n; i++)
    {
        int op;
        fin >> op;
        if (op == 1)
        {
            int x;
            fin >> x;
            s.insert(x);
            v.push_back(x);
        }
        if (op == 2)
        {
            int x;
            fin >> x;
            s.erase(v[x-1]);
        }
        if (op == 3)
        {
            fout << *s.begin() << "\n";
        }
    }
    return 0;
}