#include<stdio.h>
long n,nr,h[2010],v[2010];
void coboara(long temp)
{
long aux;
while(temp<=nr/2)
{
	if (v[temp]>v[temp*2] || v[temp]>v[temp*2+1] )
	{
		if (v[temp*2]<=v[temp*2+1])
		{
				aux=v[temp*2];
				v[temp*2]=v[temp];
				v[temp]=aux;
				aux=h[temp*2];
				h[temp*2]=h[temp];
				h[temp]=aux;
				temp=temp*2;
		}
		else
		{
				aux=v[temp*2+1];
				v[temp*2+1]=v[temp];
				v[temp]=aux;
				aux=h[temp*2+1];
				h[temp*2+1]=h[temp];
				h[temp]=aux;
				temp=temp*2+1;
		}
	}
	else break;
}
}
void urca(long temp)
{
long aux;
while(temp>=2&& nr>2)
{
if (v[temp]<v[temp/2])
{
	aux=v[temp];
	v[temp]=v[temp/2];
	v[temp/2]=aux;
	aux=h[temp];
	h[temp]=h[temp/2];
	h[temp/2]=aux;
	temp=temp/2;
}
else break;
}
coboara(temp);
}
int main()
{
long temp,i,na;
freopen("heapuri.in","r",stdin);
freopen("heapuri.out","w",stdout);
scanf("%ld",&n);
 for (i=1;i<=n;++i)
{
	scanf("%ld",&temp);
	if (temp==1)
	{
			scanf("%ld",&temp);
			v[++nr]=temp;
			h[nr]=nr;
			urca(nr);
	}
	else if (temp==2)
	{
			scanf("%ld",&temp);
			na=nr+1;
			while(na && h[--na]!=temp);
			v[na]=v[nr];
			h[na]=h[nr];
			--nr;
			urca(na);
	}
	else
	{
		printf("%ld\n",v[1]);
	}
}
return 0;
}