# include <fstream>
# include <set>
# define NR 200005
using namespace std;
ifstream f("heapuri.in");
ofstream g("heapuri.out");
int i,n,tip,nr,x;
int a[NR];
int main ()
{
    f>>n;
    multiset <int> H;
    for (i=1; i<=n; ++i)
    {
        f>>tip;
        if (tip==1)
        {
            f>>a[++nr];
            H.insert(a[nr]);
        }
        else if (tip==2)
        {
            f>>x;
            H.erase (H.find(a[x]));
        }
        else
            g<<*H.begin()<<endl;

    }
    return 0;
}