#include <fstream>

using namespace std;

ifstream in("heapuri.in");
ofstream out("heapuri.out");

const int N = 2e5;
int h[N+1],poz[N+1],v[N+1],nh;

void schimb(int p1,int p2){
    swap(h[p1],h[p2]);
    poz[h[p1]] = p1;
    poz[h[p2]] = p2;
}

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){
        schimb(p,bun);
        coboara(bun);
    }
}

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

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

void sterge(int p){
    if(p==nh){
        nh--;
        return;
    }
    schimb(p,nh--);
    urca(p);
    coboara(p);
}

int main() {
    int n = 0, nr_op;
    in >> nr_op;
    for(int i=0;i<nr_op;i++){
        int x;
        in >> x;
        if(x==1){
            in >> v[++n];
            adauga(n);
        }
        if(x==2){
            int p;
            in >> p;
            sterge(poz[p]);
        }
        if(x==3){
            out<<v[h[1]]<<"\n";
        }
    }

    return 0;
}