#include <fstream>
#include <set>
const int NMAX=200001;
using namespace std;
ifstream f("heapuri.in");
ofstream g("heapuri.out");

int n,op,x,ord[NMAX],el,i;


int main()
{
    multiset <int> heap;
    f>>n;
    for (i=1;i<=n;i++)
    {
        f>>op;
        if (op==1)
        {
            f>>x;
            heap.insert(x);
            ord[++el]=x;
        }
        if (op==2)
        {
            f>>x;
            heap.erase(heap.find(ord[x]));
        }
        if (op==3)
        {
            multiset <int> :: iterator it=heap.begin();
            g<<*it<<'\n';
        }
    }
    f.close();
    g.close();
    return 0;
}