#include <fstream>
#include <set>
using namespace std;
set <int> s;
int h[210000],i,cod,nr,e,n,a[210000];
int main()
{
    ifstream f("heapuri.in");
    ofstream g("heapuri.out");
    f>>n;
    for (i=1;i<=n;i++)
    {
        f>>cod;
    if (cod==1) {f>>e;a[++nr]=e;s.insert(e);}
    if (cod==2) {f>>e;s.erase(s.find(a[e]));}
    if (cod==3) g<<*s.begin()<<'\n';
    }

    f.close();
    g.close();
    return 0;
}