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

using namespace std;

ifstream f("heapuri.in");
ofstream g("heapuri.out");

int main()
{
    int n, v[200001];
    multiset <int> heap;
    f >> n;
    short x, s = 0;
    for(int i = 1; i <= n; i++)
    {
        f >> x;
        if(x == 1)
        {
            f >> v[++s];
            heap.insert(v[s]);
        }
        else if(x == 2)
        {
            int k;
            f >> k;
            heap.erase(v[k]);
        }
        else if(x == 3)
        {
           multiset <int> :: iterator p = heap.begin();
            g << *p << "\n";
        }
    }
    return 0;
}