#include <fstream>
#include <set>
#include <vector>
#define dim 200005
using namespace std;
ifstream fin("heapuri.in");
ofstream fout("heapuri.out");
multiset<int> h;
int a[dim];
int main()
{
    int n, x, op, m = 0;
    fin >> n;
    for (int i = 1; i <= n; i++) {
        fin >> op;
        if (op == 1) {
            fin >> x;
            a[++m] = x;
            h.insert(x);
        }
        else if (op == 2) {
            fin >> x;
            h.erase(a[x]);
        }
        else {
            multiset<int> :: iterator mini = h.begin();
            fout << *mini << "\n";
        }
    }
    return 0;
}