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

int nr=0,v[200010],x,i,n;
int tip;
set<int> a;
int main()
{
	FILE *f=fopen("heapuri.in","r");
	FILE *g=fopen("heapuri.out","w");
	fscanf(f,"%d",&n);
	for(i=1;i<=n;++i)
	{
		fscanf(f,"%d",&tip);
		if(tip==1)
		{
			fscanf(f,"%d",&x);
			a.insert(x);
			v[++nr]=x;
		}
		else
			if(tip==2)
			{
				fscanf(f,"%d",&x);
				a.erase(v[x]);
			}
			else
				fprintf(g,"%d\n",*a.begin());
	}
	return 0;
}