#include <fstream>
#include <set>

using namespace std;

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

const int MAXN = 200000;
int v[1 + MAXN];
set <int> S;

int main()
{
    int N, cnt = 0;
    in >> N;
    for (int i = 0; i < N; i++)
    {
        int somon, x;
        in >> somon;
        if(somon == 1)
        {
            in >> x;
            S.insert(x);
            v[++cnt] = x;
        }
        else if(somon == 2)
        {
            in >> x;
            S.erase(v[x]);
        }
        else
        {
            out << *(S.begin()) << '\n';
        }
    }
    return 0;
}