#include<cstdio>
#include<set>
using namespace std;

int i,x,nr=0,tip,n,v[200001];
set<int> a;
int main()
{
	freopen("heapuri.in","r",stdin);
	freopen("heapuri.out","w",stdout);
	scanf("%d",&n);
	for(i=1;i<=n;i++)
	{
		scanf("%d",&tip);
		if(tip==1)
		{
			scanf("%d",&x);
			a.insert(x);
			v[++nr]=x;
		}
		else
		if(tip==2)
		{
			scanf("%d",&x);
			a.erase(v[x]);
		}
		else
		if(tip==3)
			printf("%d\n",*a.begin());
	}
	return 0;
}