# include <fstream>
# include <set>
using namespace std;
ifstream f("heapuri.in");
ofstream g("heapuri.out");
int i,j,n,x,y,VV;
int a[200005];
int main ()
{
    f>>n;
    multiset <int> heap;
    for (i=1; i<=n; ++i)
    {
        f>>x;
        if (x==1)
        {
            f>>a[++VV];
            heap.insert(a[VV]);
        }
        else if (x==2)
        {
            f>>y;
            heap.erase(heap.find(a[y]));
        }
        else g<<*heap.begin()<<"\n";
    }

    return 0;
}