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

ifstream f("heapuri.in");
ofstream g("heapuri.out");
set <int> multime;
int v[200001];

int main()
{
    int N, cod, x, ct=1;

    f >> N;
    for(int i=1; i<=N; i++)
    {
        f >> cod;
        if(cod == 1)
        {
            f >> x;
            v[ct] = x;
            ct++;
            multime.insert(x);
        }
        else
            if(cod == 2)
            {
                f >> x;
                multime.erase(v[x]);
            }
        else
            g << *multime.begin() << "\n";
    }
}