#include <iostream>
#include <fstream>
#include <set>
using namespace std;
ifstream fin("heapuri.in");
ofstream fout("heapuri.out");
int n;
int q;
set <int> heap;
int a[200005];
void citire()
{
    int pas=0;
    fin>>n;
    for(int i=0;i<n;i++)
    {
        fin>>q;
        int x;
        if(q==1)
        {
            fin>>x;
            a[++pas]=x;
            heap.insert(x);
        }
        else
            if(q==2)
        {
            fin>>x;
            heap.erase(a[x]);
        }
        else
            if(q==3)
        {
            fout<<*heap.begin()<<'\n';
        }
    }
}
int main()
{
    citire();
    return 0;
}