#include <iostream>
#include <fstream>
#include <iomanip>
#include <algorithm>
#include <set>
#include <vector>
#include <map>
#include <queue>
#include <stack>
#include <utility>
#include <string>
#include <cstring>
#include <cctype>
#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <limits>
#include <sstream>
#include <deque>
#include <bitset>
#include <complex>
#include <functional>
#include <memory>
#include <numeric>
#define x first
#define y second
typedef std::pair<int, int> pii;

using namespace std;

int a, b, Max = 1<<30;
vector<int> vel;

int main () {
	ifstream fin("heapuri.in");
	ofstream fout("heapuri.out");
	int n, ok = 1;
	fin >> n;
	for(int i = 0; i < n; i++)
	{
		fin >> a;
		if(a == 3)
		{
			Max = 1<<30;
			for(int i = 0; i < vel.size(); i++)
				if(Max > vel[i])
					Max = vel[i];
			fout << Max << "\n";
		}
		else
		{
			fin >> b;
			if(a == 1)
			{
				vel.push_back(b);
			}
			if(a == 2)
			{
				vel.erase(vel.begin() + (b - ok));
				ok++;
			}
		}
	}
	//for(int i = 0; i < vel.size(); i++)
		//fout << vel[i] << " ";
	return 0;
}