#include <cstdio>
#include <algorithm>

using namespace std;
const int NMAX = 200000;

int heap[4 * NMAX + 5], poz[NMAX + 5];
int v[NMAX + 5], n, p, k, st, dr, best;

inline void adaug(int x)
{
    v[++n] = x;
    heap[++k] = n;
    poz[n] = k;

    p = k;
    while (p > 1 && v[heap[p]] < v[heap[p >> 1]])
    {
        swap(poz[heap[p]], poz[heap[p >> 1]]);
        swap(heap[p], heap[(p >> 1)]);
        p >>= 1;
    }
}
inline void elimin(int x)
{
    p = poz[x];
    swap(poz[heap[p]], poz[heap[k]]);
    swap(heap[p], heap[k]);
    --k;

    while (p > 1 && v[heap[p]] < v[heap[p >> 1]])
    {
        swap(poz[heap[p]], poz[heap[p >> 1]]);
        swap(heap[p], heap[(p >> 1)]);
        p >>= 1;
    }

    while ((p << 1) <= k)
    {
        st = (p << 1); dr = st + 1;
        best = st;
        if (dr <= k && v[heap[st]] > v[heap[dr]])
            best = dr;
        if (v[heap[p]] > v[heap[best]])
        {
            swap(poz[heap[p]], poz[heap[best]]);
            swap(heap[p], heap[(best)]);
        }
        else
            break;
        p = best;
    }
}
int main()
{
    freopen("heapuri.in", "r", stdin);
    freopen("heapuri.out", "w", stdout);

    int m, test, x;
    scanf("%d", &m);
    for (register int op = 1; op <= m; ++op)
    {
        scanf("%d", &test);
        if (test == 1)
        {
            scanf("%d", &x);
            adaug(x);
        }
        else if (test == 2)
        {
            scanf("%d", &x);
            elimin(x);
        }
        else
            printf("%d\n", v[heap[1]]);
    }
    return 0;
}