#include <bits/stdc++.h>
using namespace std;
ifstream in("heapuri.in");
ofstream out("heapuri.out");
int a, n,  op;
set<int> heap;
vector<int> v;
int main()
{
    in >> n;
    for(int i = 1; i <= n; i++)
    {
        in >> op;

        if(op == 1)
        {
            in >> a;
            v.push_back(a);
            heap.insert(a);
        }

        if(op == 2)
        {
            in >> a;
            heap.erase(v[a - 1]);
        }

        if(op == 3)
        {
            out << *(heap.begin());
            out << "\n";
        }
    }
    return 0;
}