#include <bits/stdc++.h>
using namespace std;
ifstream fin("heapuri.in");
ofstream fout("heapuri.out");
vector<int>v;
multiset<int>s;
int main()
{
    int q;
    fin >> q;
    for(; q>0; q--)
    {
        int op, x;
        fin >> op;
        if(op<3)
            fin >> x;
        if(op==1)
        {
            v.push_back(x);
            s.insert(x);
        }
        else if(op==2)
        {
            s.erase(s.find(v[x-1]));
        }
        else
        {
            auto t=s.begin();
            fout << *t << "\n";
        }
    }
    return 0;
}