#include <iostream>
#include <fstream>
#include <set>
#define NMAX 200001
using namespace std;
ifstream in("heapuri.in");
ofstream out("heapuri.out");

int order[NMAX],n,t,x,orders;
multiset <int> my_set;

int main()
{
    in>>n;
    
    for(int i=1;i<=n;++i)
    {
        
        in>>orders;
        
        if(orders == 1)
        {
            in>>x;
            
            my_set.insert(x);
            t++;
            order[t] = x;
        }
        
        if(orders == 2)
        {
            in>>x;
            
            x = order[x];
            
            my_set.erase(x);
        }
        
        if(orders == 3)
        {
            multiset<int>::iterator it;
            
            it = my_set.begin();
            out<<*it<<'\n';
            
        }
    }
}