#include <iostream>
#include <fstream>
#include <set>
using namespace std;
ifstream fin("heapuri.in");
ofstream fout("heapuri.out");
multiset<int> v;
int n,t,st[200001],i,x,k;
int main()
{
    fin>>n;
    for(i=1;i<=n;i++)
    {
        fin>>t;
        if(t==1)
        {
            fin>>x;
            v.insert(x);
            st[++k]=x;
        }
        else if(t==2)
        {
            fin>>x;
            v.erase(v.find(st[x]));
        }
        else
        {
            multiset<int>::iterator i=v.begin();
            fout<<*i<<"\n";
        }
    }
    return 0;
}