#include <stdio.h>
#include <bits/stdc++.h>

#define rep(i, n) for(int i = 0; i < (int)(n); i++)

using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
const int INF = 0x3f3f3f3f;

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

int main(void) {
  // freopen("heapuri.in", "r", stdin);
  std::ios_base::sync_with_stdio(false);
  std::cin.tie(NULL);
  int N, q, x;
  multiset<int> ms;
  fin >> N;
  vector<multiset<int>::iterator> msit; // (N);
  rep(i, N) {
    fin >> q;
    switch(q) {
      case 1:
        fin >> x;
        msit.push_back(ms.insert(x));
        break;
      case 2:
        fin >> x;
        --x;
        ms.erase(msit[x]);
        break;
      case 3:
        fout << *ms.begin() << '\n';
        break;
    }
  }

  return 0;
}