#include <iostream>
#include <fstream>
#include<vector>
#include<climits>
using namespace std;
vector <int> g[16002];
int v[200001],h[200001],poz[200001],k;
int nr,n,m;
ifstream fin("heapuri.in");
ofstream fout("heapuri.out");
void insert_heap(int k){
    while(k/2>0&&v[h[k]]<v[h[k/2]]){
        {
            swap(h[k],h[k/2]);
            poz[h[k]]=k;
            poz[h[k/2]]=k/2;
            k=k/2;
        }
    }

}
void remove_heap(int p){
    if(p==k){
        k--;
        return;
    }
    h[p]=h[k--];
    poz[h[p]]=p;
   while(2*p<=k){
      int st=2*p, dr=2*p+1,crt=p;
      if(v[h[st]]<v[h[crt]])
          crt=st;
      if(dr<=k&&v[h[dr]]<v[h[crt]])
          crt=dr;
      if(crt!=p){
        swap(h[p],h[crt]);
        poz[h[crt]]=crt;
        poz[h[p]]=p;
        p=crt;
      }
      else
         break;

   }
}

int main(){
fin>>n; int c,val;
for(int i=1;i<=n;i++){
    fin>>c;
    if(c==1){
        fin>>val;
        v[++nr]=val;
        h[++k]=nr;
        poz[nr]=k;
        insert_heap(k);
    }
    else
    if(c==2){
        fin>>val;
        remove_heap(poz[val]);
    }
    else
        fout<<v[h[1]]<<'\n';

}
    return 0;
}