#include <iostream>
#include <fstream>
#include <vector>

struct node{
    node *st,*dr;
    int val;
}*bst;

node * find(int val,node * nod){
    if(nod==NULL)
        return NULL;
    if(nod->val==val)
        return nod;
    if(val>nod->val)
        return find(val,nod->dr);
    return find(val,nod->st);
}

node * insert(int val,node *&nod){
    if(nod==NULL){
        nod=new node();
        nod->val=val;
        return nod;
    }
    if(val>nod->val)
        return insert(val,nod->dr);
    return insert(val,nod->st);
}

node * minb(node *start){
    while(start->st!=NULL)
        start=start->st;
    return start;
}

node * erase(int val,node *&nod){
    if(nod==NULL)
        return NULL;
    if(val<nod->val)
        nod->st=erase(val,nod->st);
    else
        if(val>nod->val)
            nod->dr=erase(val,nod->dr);
        else{
            if(nod->st==NULL){
                node * tmp=nod->dr;
                delete nod;
                return tmp;
            }
            if(nod->dr==NULL){
                node * tmp=nod->st;
                delete nod;
                return tmp;
            }
            node *tmp=minb(nod);
            nod->val=tmp->val;
            nod->dr=erase(tmp->val,nod->dr);
        }
    return nod;
}
std::ifstream in("heapuri.in");
std::ofstream out("heapuri.out");
std::vector<int>v;
int main(){
    int n,t,aux;
    in>>n;
    for(int i=1;i<=n;i++){
        in>>t;
        if(t==3)
            out<<minb(bst)->val<<'\n';
        else{
            in>>aux;
            if(t==1){
                insert(aux,bst);
                v.push_back(aux);
            }
            else
                erase(v[aux-1],bst);
        }
    }
    return 0;
}