#include <stdio.h>
#include <set>

using namespace std;

set<long> heap;
long i,n,sw,x,v[200002],m;

int main()
{
	freopen("heapuri.in","r",stdin);
	freopen("heapuri.out","w",stdout);

	scanf("%ld",&n);
	m=0;
	for(i=1;i<=n;i++)
	{
		scanf("%ld",&sw);
		if(sw==1)
		{
			scanf("%ld",&v[++m]);
			heap.insert(v[m]);
		}
		else
		if(sw==2)
		{
			scanf("%ld",&x);
			heap.erase(v[x]);
		}
		else
		if(sw==3) printf("%ld\n",*heap.begin());
	}

	return 0;
}