#include <fstream>

using namespace std;

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

int h[1000005], v[1000005], poz[1000000];
int nh;

void swapp (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]])
        {
            swapp (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, fd = 2*p + 1, 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)
    {
        swapp (p, bun);
        coboara (bun);
    }
}

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

int main()
{
    int n;

    in>>n;

    for (int i=1; i<=n; i++)
    {
        int x, y;
        in>>x;
        if (x == 3) out<<h[1]<<"\n";
        if (x == 1)
            {
                in>>y;
                adauga (y);
            }
        if (x == 2)
        {
            in>>y;
            sterge (poz[y]);
        }
    }

    return 0;
}