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

using namespace std;
set <int> heap;
set<pair<int,int> > v;

int n;

int main()
{
    ifstream f("heapuri.in");
    ofstream g("heapuri.out");
    unsigned t; int r,i,x=1;
    f>>n;
    for(i=1;i<=n;i++)
    {
        f>>t;
        if(t==3)g<<*heap.begin();
        else if(t==2)
        {
            f>>r;
            heap.erase((*v.begin()).second);
            v.erase(v.begin());
        }
        else if(t==3)
        {
            f>>r;
            heap.insert(r);
            v.insert(make_pair(x++,r));
        }
    }
    return 0;
}