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

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

const int NMAX = 200010;
int Heap[NMAX], Val[NMAX], Poz[NMAX], N, i;

void Swap(int x, int y)
{
    swap(Heap[x], Heap[y]);
    swap(Poz[Heap[x]], Poz[Heap[y]]);
}

bool cmp(int x, int y)
{
    return x < y;
}

void UpHeap(int x)
{
    int Father = x / 2;
    if(Father && cmp(Val[Heap[x]],Val[Heap[Father]]))
    {
        Swap(x, Father);
        UpHeap(Father);
    }
}

void DownHeap(int x)
{
    int Son = x * 2;
    if(Son + 1 <= N && cmp(Val[Heap[Son + 1]], Val[Heap[Son]]))
        Son += 1;
    if(Son <= N && cmp(Val[Heap[Son]], Val[Heap[x]]))
    {
        Swap(Son, x);
        DownHeap(Son);
    }
}

void Insert(int x)
{
    i += 1;
    Val[i] = x;

    N += 1;
    Heap[N] = i;
    Poz[i] = N;

    UpHeap(N);
}

void Erase(int x)
{
    Swap(x,N);
    N -= 1;
    DownHeap(x);
}

int main()
{
    int q, x, t;

    f >> q;
    while(q --)
    {
        f >> t;
        if(t == 1)
        {
            f >> x;
            Insert(x);
        }
        else if(t == 2)
        {
            f >> x;
            Erase(Poz[x]);
        }
        else g << Val[Heap[1]] << '\n';
    }

	return 0;
}