#include <iostream>
#include <fstream>
#include <set>
#include <vector>
using namespace std;
ifstream f("heapuri.in");
ofstream g("heapuri.out");
int n;
set<int>::iterator it;
set <int> s;
vector <int> v;

int main()
{
    int i,p,x;
    f>>n;
    for(i=1; i<=n; i++)
    {
        f>>p;
        if(p==1)
        {f>>x; s.insert(x); v.push_back(x);}
        if(p==2)
        {
            f>>x;
            it=s.find(v[x-1]);
            s.erase(it);
        }
        if(p==3)
        {g<<*s.begin()<<"\n";}
    }
    f.close();
    g.close();
    return 0;
}