#include <fstream>
#include <set>

using namespace std;

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

int N, nr, V[200001];
set<int> heap;

int main()
{
    int op, x, k;
    in >> N;
    for(int i = 1; i <= N; i++)
    {
        in >> op;
        if(op == 1)
        {
            in >> x;
            V[++nr] = x;
            heap.insert(x);
        }
        else if(op == 2)
        {
            in >> k;
            heap.erase(V[k]);
        }
        else
            out << *heap.begin() << '\n';
    }
    return 0;
}