#include <cstdio>
#include <algorithm>
#define MAXN 200001
using namespace std;
int heap[MAXN],v[MAXN],poz[MAXN];
int l,n,k;
inline void up(int p)
{
    while(p/2 && v[heap[p/2]]>v[heap[p]])
    {
        swap(poz[heap[p/2]],poz[heap[p]]);
        swap(heap[p/2],heap[p]);
        p/=2;
    }
}
inline void down(int p)
{
    int y;
    bool ok=true;
    while(ok)
    {
        ok=false;
        if(2*p<=l)
        {
            ok=true;y=2*p;
            if(2*p+1<=l && v[heap[2*p]]>v[heap[2*p+1]])
                y++;
        }
        if(ok && v[heap[y]]<v[heap[p]])
        {
            swap(poz[heap[p]],poz[heap[y]]);
            swap(heap[p],heap[y]);
            p=y;
        }
    }
}
inline void add(int x)
{
    v[k]=x;
    heap[++l]=k;poz[k]=l;
    up(l);
}
inline void pop(int p)
{
    poz[heap[l]]=p;
    heap[p]=heap[l];
    l--;
    if(v[heap[p]]<v[heap[p/2]])
        up(p);
    else
        down(p);
}
int main()
{
    FILE *fin,*fout;
    fin=fopen("heapuri.in","r");
    fout=fopen("heapuri.out","w");
    int cod,x;
    fscanf(fin,"%d",&n);
    for(int i=1;i<=n;i++)
    {
        fscanf(fin,"%d",&cod);
        if(cod==3)
            fprintf(fout,"%d\n",v[heap[1]]);
        else
        {
            fscanf(fin,"%d",&x);
            if(cod==1)
                k++,add(x);
            else
                pop(poz[x]);
        }
    }
    fclose(fin);
    fclose(fout);
    return 0;
}