#include<fstream>
#include<set>
#define N 200010
using namespace std;
ifstream in("heapuri.in");
ofstream out("heapuri.out");
multiset <int> v;
int poz[N];
int main()
{
	int nr,i,x,op,n=0;
	in>>nr;
	for (i=0;i<nr;i++)
	{
		in>>op;
		if (op==1)
		{
			in>>x;
			v.insert(x);
			poz[++n]=x;
		}
		if (op==2)
		{
			in>>x;
			v.erase(v.find(poz[x]));
		}
		if (op==3)out<<*v.begin()<<'\n';
	}
}