#include <fstream>
#include <set>
using namespace std;
ifstream f("heapuri.in");
ofstream g("heapuri.out");

int n, x, a[200005], operatie, nr;
set < int > multime;

int main()
{
    f>>n;
    for (int i=1; i<=n; ++i)
    {
        f>>operatie;
        if (operatie==1)
        {
            f >> x;
            a[++nr]=x;
            multime.insert(x);
        }
        else if (operatie==2)
        {
            f >> x;
            multime.erase(a[x]);
        }
        else g<<*multime.begin()<<'\n';
    }
    return 0;
}