#include <fstream>
using namespace std;
ifstream cin("heapuri.in");
ofstream cout("heapuri.out");
const int N=2e5+1;
int n,nrc,k,h[N],v[N],poz[N];

void schimba(int p, int q){
    swap(h[p],h[q]);
    poz[h[p]]=p;
    poz[h[q]]=q;
}

void urca(int p){
    while(v[h[p]]<v[h[p/2]]){
        schimba(p,p/2);
        p/=2;
    }
}

void adauga(int val){
    h[++k]=val;
    urca(k);
}

void coboara(int p){
    int fs=p*2,fd=2*p+1,bun=p;
    if(fs<=k && v[h[fs]]<v[h[bun]])
        bun=fs;
    if(fd<=k && v[h[fd]]<v[h[bun]])
        bun=fd;
    if(bun!=p){
        schimba(p,bun);
        coboara(bun);
    }
}

void sterge(int p){
    if(p==k)
        k--;
    else{
        schimba(p,k--);
        urca(p);
        coboara(p);
    }
}

int main()
{
    int n;
    cin>>n;
    while(n--){
        int c;
        cin>>c;
        if(c==1){
            cin>>v[++nrc];
            poz[nrc]=nrc;
            adauga(nrc);
        }
        if(c==2){
            int x;
            cin>>x;
            sterge(poz[x]);
        }
        if(c==3)
            cout<<v[h[1]]<<'\n';
    }
    return 0;
}