#include <fstream>
#include <set>
using namespace std;

ifstream fin("heapuri.in");
ofstream fout("heapuri.out");
multiset<int> heap;
int n, x, y, V[100010], i;
int main()
{
    fin >> n;
    int poz = 1;
    for(i = 1; i <= n;i ++)
        {
            fin >> x;
            if(x == 1)
            {
                fin >> y;
                heap.insert(y);
                V[poz] = y;
                poz ++;
            }
            else
                if(x == 2)
                {
                    fin >> y;
                    heap.erase(V[y]);
                }
                else
                    fout << *heap.begin() << '\n';
        }
    return 0;
}