#include <fstream>
#include <set>

using namespace std;

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

int n, cerinta, nr;

int v[200005];

multiset < int > heap;

multiset < int > :: iterator it;

int main()
{
    f >> n;
    for (int i=1; i<=n; i++)
    {
        f >> cerinta;

        if (cerinta == 1)
        {
            int x; f >> x;
            heap.insert(x);
            nr ++; v[nr] = x;
        }
        else if (cerinta == 2)
        {
            int x; f >> x;
            heap.erase(heap.find(v[x]));
        }
        else
        {
            it = heap.begin();
            g << *it << "\n";
        }
    }
    return 0;
}