#include <bits/stdc++.h>
#define N 200005

using namespace std;

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

int valori[N], n, tipOperatie, element, k;

set<int> multimeElemente;

int main() {
    f >> n;
    for (int i = 1; i <= n; i++) {
        f >> tipOperatie;
        if (tipOperatie == 1) {
            f >> element;
            valori[++k] = element;
            multimeElemente.insert(element);
        }
        else if (tipOperatie == 2) {
            f >> element;
            multimeElemente.erase(valori[element]);
        }
        else {
            g << *multimeElemente.begin() << "\n";
        }
    }
    return 0;
}