#include <fstream>
#include <set>

using namespace std;

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

multiset<int> a;
multiset<int>::iterator it;

int n,i,x,c,j,v[200005];

int main()
{
    fin >> n;
    for (i=1;i<=n;i++)
    {
        fin >> c;
        if (c==3)
        {
            it=a.begin();
            fout << *it << "\n";
        }
        if (c==2)
        {
            fin >> x;
            a.erase(v[x]);
        }
        if (c==1)
        {
            j++;
            fin >> x;
            v[j]=x;
            a.insert(x);
        }
    }

    return 0;
}