#include <fstream>
#include <algorithm>
#include <iomanip>
#include <set>
using namespace std;
ifstream fin("heapuri.in");
ofstream fout("heapuri.out");
set <int>h;
int intrare[200001],n,i,nrele,x,tip;
int main()
{
	fin>>n;
	for(i=1;i<=n;i++)
	{
		fin>>tip;
		if(tip==1)
		{
			fin>>x;
			h.insert(x);
			intrare[++nrele]=x;
		}
		else if(tip==2)
		{
			fin>>x;
			h.erase(intrare[x]);
		}
		else
			fout<<*h.begin()<<"\n";
	}
	return 0;
}