#include <fstream>
#include <set>

using namespace std;

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

int n,nr=0,operatie;
multiset <int> heap;
int vector[200005];

int main()
{
    int i,x;
    in>>n;
    for(i=1;i<=n;i++)
    {
        in>>operatie;
        if(operatie==1)
        {
            in>>x;
            heap.insert(x);
            nr++;
            vector[nr]=x;
        }
        if(operatie==2)
        {
            in>>x;
            heap.erase(vector[x]);
        }
        if(operatie==3)
        {
            out<<*heap.begin()<<"\n";
        }
    }
    in.close();
    out.close();
    return 0;
}