#include <fstream>
#include <set>
#include <vector>
using namespace std;

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

int n;
multiset<int> ms;
vector<int> v;

int main()
{
    fin>>n;
    for(int i=0;i<n;++i)
    {
        int op, x;
        fin>>op;
        if(op==1)
            fin>>x, v.push_back(x), ms.insert(x);
        else if(op==2)
            fin>>x, ms.erase(v[x-1]);
        else if(op==3)
            fout<<*ms.begin()<<'\n';
    }
    return 0;
}