#include <cstdio>
const int Q=200500;
int v[Q],poz[Q],h[Q],nh;


void schimba(int a,int b){
    int aux,aux1;
    aux=h[a];
    h[a]=h[b];
    h[b]=aux;
    poz[h[a]]=a;
    poz[h[b]]=b;
}

void coboara(int p){
    int fs=3*p-1,fm=3*p,fd=3*p+1,bun=p;
    if ( fs<=nh&&v[h[fs]]<v[h[bun]] ) bun=fs;
    if ( fm<=nh&&v[h[fm]]<v[h[bun]] ) bun=fm;
    if ( fd<=nh&&v[h[fd]]<v[h[bun]] ) bun=fd;
    if ( bun!=p ){
        schimba(bun,p);
        coboara(bun);
    }
}

void urca(int p){
    while ( v[h[p]]<v[h[(p+1)/3]]&&p>1 ){
        schimba(p,(p+1)/3);
        p=(p+1)/3;
    }
}

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

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

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