#include <fstream>
#define fs(x) x*2
#define fd(x) x*2+1
using namespace std;

int val[200010],h[200010],l[200010],n,m,nr;


int maxx(int a,int b)
{
    if(val[a]<val[b])
        return a;
    return b;
}

void sift(int i)
{
    do
    {
        if(fs(i)<=m&&val[h[fs(i)]]<val[h[i]])
        {
            if(fd(i)<=m&&val[h[fd(i)]]<val[h[i]])
            {
                int s=maxx(fs(i),fd(i));
                swap(h[s],h[i]);
                l[h[s]]=s;l[h[i]]=i;
                i=s;
            }
            else
            {
                swap(h[fs(i)],h[i]);
                l[h[fs(i)]]=fs(i);l[h[i]]=i;
                i=fs(i);
            }
        }
        else
            if(fd(i)<=m&&val[h[fd(i)]]<val[h[i]])
            {
                swap(h[fd(i)],h[i]);
                l[h[fd(i)]]=fd(i);l[h[i]]=i;
                i=fd(i);
            }
        else return ;
    } while (1);
}


void percolate(int i)
{
    do
    {
        if(val[h[i]]<val[h[i/2]])
        {
            swap(h[i],h[i/2]);
            l[h[i]]=i;l[h[i/2]]=i/2;
            i=i/2;
        }
        else
            return;
    } while (1);
}

void insert(int x)
{
    val[++nr]=x;
    h[++m]=nr;l[nr]=m;
    percolate(m);
}

void delet(int x)
{
    int i=l[x];
    if(i!=m)
    {
        h[i]=h[m];h[m--]=0;
        if(val[h[i]]<val[h[i/2]])
            percolate(i);
        else
            sift(i);
    }
    else
        h[m--]=0;
}

int main()
{
    ifstream f("heapuri.in");
    f>>n;
    int o;
    ofstream g("heapuri.out");
    for(int i=0;i<n;i++)
    {
        f>>o;int x;
        switch(o)
        {
            case 1: f>>x; insert(x);break;
            case 2: f>>x; delet(x);break;
            case 3: g<<val[h[1]]<<'\n';
        }
    }
    return 0;
}