#include <fstream>
#include <set>
#include <vector>
using namespace std;
vector<int> V;
ifstream fin ("heapuri.in");
ofstream fout("heapuri.out");
int n,i,t,x;
int main()
{
    fin>>n;
    multiset<int> set;
    for(i=1;i<=n;i++)
    {
        fin>>t;
        if(t==1)
        {
            fin>>x;
            set.insert(x);
            V.push_back(x);
        }
        else
            if (t==2)
            {
                fin>>x;
                set.erase(set.find(V[x-1]));
            }
            else
                fout<<*set.begin()<<"\n";
    }

    return 0;
}