#include <cstdio>

using namespace std;

int h[200000],poz[200000],nh,v[200000];

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

void coboara(int p) {
    int fs=2*p,fd=2*p+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(p,bun);
        coboara(bun);
    }
}

void urca(int p) {
    if (p>1 && v[h[p]]<v[h[p/2]]) {
        schimba(p,p/2);
        urca(p/2);
    }
}

void sterge(int p) {
    schimba(p,nh--);
    urca(p);
    coboara(p);
}

void adauga(int x) {
    h[++nh]=x;
    poz[x]=nh;
    urca(nh);
}

int main()
{
    int n,i,a,tip,nrad,p;
    freopen("heapuri.in","r",stdin);
    freopen("heapuri.out","w",stdout);
    scanf("%d", &n);
    nrad=0;
    nh=0;
    for (i=0;i<n;i++) {
        scanf("%d", &tip);
        if (tip==1) {
            scanf("%d", &v[++nrad]);
            adauga(nrad);
        }
        if (tip==2) {
            scanf("%d", &p);
            sterge(poz[p]);
        }
        if (tip==3)
            printf("%d\n", v[h[1]]);
    }
    return 0;
}