#include<fstream>
#include<set>
#include<iterator>

using namespace std;



int main()
{

    set <int> heap;
    int n,i,x,y;
    long v[200001],cont;
    ifstream f("heapuri.in");
    ofstream g("heapuri.out");

   f>>n;
   cont=0;
   for(i=1;i<=n;i++)
    {
        f>>x;
        if(x==1)
        {
        f>>y;
        heap.insert(y);
        v[++cont]=y;

        }
        if(x==3)
        {
            set <int> ::iterator it = heap.begin();
            g<<*it<<endl;
        }
         if(x==2){
             f>>y;
             heap.erase(v[y]);

         }
    }

}