#include <fstream>
#include <set>

using namespace std;

multiset<int> heap;
multiset <int> :: iterator it;

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

int main()
{
    int N,v,f;
    in>>N;
    int poz[150000];
    int sf = 0;
    while(N--)
    {
        in>>f;
        if(f==1)
        {
            in>>v;
            heap.insert(v);
            poz[++sf]=v;
        }
        if(f==2)
        {
            in>>v;
            heap.erase(poz[v]);
        }
        if(f==3)
        {
            it = heap.begin();
            out<<*it<<'\n';
        }
    }
    return 0;
}