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

int main()
{
    ifstream f("heapuri.in");
    ofstream g("heapuri.out");
    int n,m,x;
    f>>n;
    multiset <int> s;
    vector <int> v;
    v.push_back(0);

    for (int z=1; z<=n; z++) {

        f>>m;


        if(m==1){
            f>>x;
            v.push_back(x);
            s.insert(x);
        }


        if(m==2){
            f>>x;
            s.erase(v[x]);
        }

        if(m==3){
            multiset <int> :: iterator it=s.begin();
            g<<("%d/n", *it)<<endl;
        }
    }

    return 0;
}