#include <fstream>

using namespace std;

const int N = 2e5 + 1;
int v[N],nh,h[N],poz[N];

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

void schimb(int p, int q)
{
    swap(h[p],h[q]);
    poz[h[p]] = p;
    poz[h[q]] = q;
}

void urca(int p)
{
    while(p > 1 && v[h[p]] < v[h[p/2]])
    {
        schimb(p,p/2);
        p/=2;
    }
}

void adauga(int val)
{
    h[++nh] = val;
    poz[val] = nh;
    urca(nh);
}

void coboara(int p)
{
    int fs = 2*p;
    int fd = 2*p + 1;
    int bun = p;
    if(fs <= nh && v[h[fs]] < v[h[bun]])
    {
        bun = fs;
    }
    if(fd <= nh && v[h[fd]] < v[h[bun]])
    {
        bun = fd;
    }
    if(bun != p)
    {
        schimb(bun,p);
        coboara(bun);
    }
}

void stergere(int p)
{
    if (p == nh)
    {
        nh--;
    }
    else
    {
        h[p] = h[nh--];
        poz[h[p]] = p;
        urca(p);
        coboara(p);
    }
}

int main()
{
    int nr_op,n = 0;
    in >> nr_op;
    for(int i = 1; i <= nr_op; i++)
    {
        int tip;
        in >> tip;
        if(tip == 1)
        {
            in >> v[++n];
            adauga(n);
        }
        else if(tip == 2)
        {
            int x;
            in >> x;
            stergere(poz[x]);
        }
        else if(tip == 3)
        {
            out << v[h[1]] << "\n";
        }
    }
    return 0;
}