#include <fstream>
#include <set>
#include <vector>

using namespace std;

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

int n,caz,i,element;
set<int> ss;
vector<int> v;


int main()
{
    fin>>n;
    for (i=1;i<=n;i++)
    {
        fin>>caz;
        if (caz == 1)
        {
            fin>>element;
            v.push_back(element);
            ss.insert(element);
        }
        if (caz == 2)
        {
            fin>>element;
            element = v[element-1];
            ss.erase(element);
        }
        if (caz == 3)
            fout<<*(ss.begin())<<"\n";
    }
    return 0;
}