#include<fstream>
#include<iostream>
using namespace std;
ifstream in("heapuri.in");
ofstream out("heapuri.out");
const int NMAX = 200000;

typedef int heap[NMAX+5];
heap h;

int n,poz[NMAX+5],elem,el;

int tata(int nod)
{

    return nod/2;
}

int fiu_st(int nod)
{

    return nod*2;
}

int fiu_dr(int nod)
{

    return nod*2+1;
}

void sift(int nod,int N)
{
    int son = 0,ans;
    do{
        son = 0;
        if(fiu_st(nod) <= N)
            son = fiu_st(nod);
        if(fiu_dr(nod) <= N && h[fiu_st(nod)] > h[fiu_dr(nod)])
            son = fiu_dr(nod);
        if(h[nod] < h[son])
            son = 0;
        if(son != 0){
            swap(h[son],h[nod]);
            swap(poz[son],poz[nod]);
            nod = son;
        }
    }while(son);
}

int perc(int nod)
{

    int key = h[nod];
    while(tata(nod) > 1 && h[nod] < h[tata(nod)])
    {
        swap(h[nod],h[tata(nod)]);
        swap(poz[nod],poz[tata(nod)]);
        nod = tata(nod);
    }
    h[nod] = key;
    return nod;
}

void del(int pozitie,int& N)
{
    swap(h[pozitie],h[N]);
    swap(poz[pozitie],poz[N]);
    --N;
    sift(pozitie,N);
}

int afis_min()
{

    return h[1];
}

int main()
{

    in>>n;
    int q,x;
    for(int i = 1 ; i <= n ; i++){
        in>>q;
        if(q == 1){
            in>>x;
            ++elem;
            h[++el] = x;
            poz[elem] = perc(el);
        }
        else if(q == 2){
            in>>x;
            del(poz[x],el);
        }
        else
            out<<afis_min()<<"\n";
    }
    return 0;
}