#include <bits/stdc++.h>
#define NM 200005

using namespace std;

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

int t, c, x;
int h[NM], pos[NM], whatPos[NM];
int hSize = 0, nrAdded = 0;

void schimba(int a, int b)
{
    swap(h[a], h[b]);
    swap(pos[whatPos[a]], pos[whatPos[b]]);
    swap(whatPos[a], whatPos[b]);
}

void add(int k)
{
    h[++hSize] = k;
    whatPos[hSize] = nrAdded;
    pos[nrAdded] = hSize;

    int a = hSize;
    while(a > 0 && h[a / 2] > h[a])
    {
        schimba(a, a / 2);
        a /= 2;
    }
}

int top() { return h[1]; }

void del(int k)
{
    k = pos[k];
    schimba(k, hSize);
    hSize--;
    int a;
    while(k * 2 <= hSize && (h[k] > h[k * 2] || h[k] > h[k * 2 + 1]))
    {
        if(k * 2 + 1 > hSize)
            a = k * 2;
        else
            a = (h[k * 2] < h[k * 2 + 1] ? k * 2 : k * 2 + 1);

        if(h[k] < h[a])
            break;

        schimba(k, a);
        k = a;
    }
}

int main()
{
    fin >> t;
    for(; t; t--)
    {
        fin >> c;
        switch(c)
        {
        case 1:
            fin >> x;
            nrAdded++;
            add(x);
            break;
        case 2:
            fin >> x;
            del(x);
            break;
        case 3:
            fout << top() << '\n';
            break;
        }
    }
    return 0;
}