#include <bits/stdc++.h>

using namespace std;
ifstream fin ("heapuri.in");
ofstream fout ("heapuri.out");

map <int, int> m;
multiset <int> s;
multiset <int> :: iterator it;

int main()
{
    int x, op, y, i = 0, j;
    fin >> op;
    while (op--)
    {
        /// citesc operatia
        fin >> x;
        if (x == 1)
        {
            /// citesc valoare introdusa
            fin >> y;
            i++;
            m[i] = y;
            s.insert(y);
        }
        else if (x == 2)
        {
            fin >> y;
            ///m[y] = 0;
            j = m[y];
            it = s.find(j);
            s.erase(it);
        }
        else /// x == 3
        {
            fout << *s.begin() << "\n";
        }
    }
    fin.close();
    fout.close();
    return 0;
}