#include<set>
#include<fstream>

using namespace std;

ifstream f("heapuri.in");
ofstream g("heapuri.out");

int main()
{
    int n,optiune,x,val[200001],j=1;
    set<int> myset;
    f>>n;
    for(int i=1;i<=n;i++)
    {f>>optiune;
    if(optiune==1)
    {
        f>>x;
        myset.insert(x);
        val[j]=x;
        j++;

    }

    if(optiune==2)
    {
        f>>x;
        myset.erase(val[x]);
    }

    if(optiune==3)
    {
        g<<*myset.begin()<<'\n';
    }
    }

}