#include <fstream>
#include <set>

using namespace std;

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

#define NMAX 200005

int n, nr, v[NMAX];
multiset<int> heap;

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