#include <iostream>
#include <fstream>
#include <set>
#define Max 200005
using namespace std;

ifstream fin("heapuri.in");
ofstream fout("heapuri.out");
set <pair<int,int>> S;
int n,cod,v[Max],cnt=0;
int main()
{
    fin>>n;
    for(int i=1;i<=n;i++)
    {
        fin>>cod;
        if(cod==1)
        {
            int x;
            fin>>x;
            cnt++;
            S.insert({x,cnt});
            v[cnt]=x;
        }
        else if(cod==2)
        {
            int x;
            fin>>x;
            S.erase({v[x],x});
        }
        else
        {
            fout<<(*S.begin()).first<<"\n";
        }
    }
    return 0;
}