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

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

int main()
{
    multiset <int> heap;
    int v[20001];
    int op,s=0;
    in>>op;
    for(int i=1;i<=op;i++)
    {
        int k;
        in>>k;
        if(k==1)
        {
            int x;
            in>>x;
            v[s++]=x;
            heap.insert(x);
        }
        else if(k==2)
        {
            int x;
            in>>x;
            heap.erase(v[x-1]);
        }
        else
        {
            out<<*(heap.begin())<<'\n';
        }
    }
}