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

ifstream fin("heapuri.in");
ofstream fout("heapuri.out");

int n,i,x,lamomentu[200100],tip;
int cnt;
multiset<int> s;

int main()
{
    fin>>n;
    for(i=1;i<=n;++i)
    {
        fin>>tip;
        if(tip==1)
        {
            fin>>x;
            cnt++;
            lamomentu[cnt]=x;
            s.insert(x);
            continue;
        }
        if(tip==2)
        {
            fin>>x;
            s.erase(s.find(lamomentu[x]));
            continue;
        }
        fout<<*(s.begin())<<'\n';
    }
    return 0;
}