#include <fstream>

using namespace std;
ifstream in("heapuri.in");
ofstream out("heapuri.out");

const int Q=200500;
int v[Q],poz[Q],h[Q],nh;

void schimba(int a,int b){
    int aux,aux1;
    aux=h[a];
    h[a]=h[b];
    h[b]=aux;
    poz[h[a]]=a;
    poz[h[b]]=b;
}
void coboara(int p){
    int fs=p*2,fd=p*2+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){
        schimba(bun,p);
        coboara(bun);
    }
}
void urca(int p){
    while(v[h[p]]<v[h[p/2]]&&p>1){
        schimba(p,p/2);
        p/=2;
    }

}
void adauga(int x,int nr)
{
    h[++nh]=nr;
    poz[nr]=nh;
    urca(nh);
}
void sterge(int p)
{
    schimba(nh--,p);
    urca(p);
    coboara(p);
}
int main()
{
    int n,cod,x,nr=0;
    in>>n;
    for(int i=1;i<=n;i++){
        in>>cod;
        if(cod==1)
        {
            in>>v[++nr];
            adauga(v[nr],nr);
        }
        if(cod==2)
        {
            in>>x;
            sterge(poz[x]);
        }
        if(cod==3)
        {
            out<<v[h[1]]<<endl;
        }
    }
    return 0;
}