#include <bits/stdc++.h>

using namespace std;

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

unordered_map <int, int> mp;

multiset <int> s;

int Q, task, val, ind;

int main(){

    ios :: sync_with_stdio(false);
    fin.tie(0);
    fout.tie(0);

    fin >> Q;

    while(Q--){
        fin >> task;
        switch(task){
            case 1:
                fin >> val;
                ind++;
                mp[ind] = val;
                s.insert(val);
                break;
            case 2:
                fin >> val;
                s.erase(s.find(mp[val]));
                break;
            case 3:
                fout << *(s.begin()) << "\n";
                break;
        }
    }

    fin.close();
    fout.close();
    return 0;

}