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#include <fstream>
using namespace std;
ifstream in("heapuri.in");
ofstream out("heapuri.out");
const int N=200005;
int h[N], poz[N], v[N];
int n, nh;
void swapp(int p, int q)
{
swap(h[p], h[q]);
poz[h[p]]=p;
poz[h[q]]=q;
}
void urca (int p)
{
while(p>1 && v[h[p]]<v[h[p/2]])
{
swapp(p, p/2);
p/=2;
}
}
void adauga(int p)
{
h[++nh]=p;
poz[p]=nh;
urca(nh);
}
void coboara(int p)
{
int fs=2*p, fd=2*p+1, bun=p;
if(fs<=nh && v[h[fs]]<v[h[bun]]) bun=fs;
if(fd<=nh && v[h[fd]]<v[h[bun]]) bun=fd;
if(bun!=p)
{
swapp(p, bun);
coboara(bun);
}
}
void sterge(int p)
{
if(p==nh)
{
nh--;
return;
}
h[p]=h[nh--];
poz[h[p]]=p;
urca(p);
coboara(p);
}
int main()
{
int citire=0;
in>>n;
for(int i=1; i<=n; i++)
{
int x;
in>>x;
if(x==1)
{
citire++;
in>>v[citire];
adauga(citire);
}
else if(x==2)
{
int y;
in>>y;
sterge(poz[y]);
}
else out<<v[h[1]]<<'\n';
}
return 0;
}