#include <iostream>
#include <fstream>
using namespace std;
ifstream f("heapuri.in");
ofstream g("heapuri.out");
const int N=2e5+1;
int n,h[N],poz[N],v[N],nrc,k;
void schimba(int p, int q){
swap(h[p],h[q]);
poz[h[p]]=p;
poz[h[q]]=q;
}
void urca(int p){
while(v[h[p]]<v[h[p/2]]){
schimba(p,p/2);
p/=2;
}
}
void adauga(int val){
h[++k]=val;
urca(k);
}
void coboara(int p){
int fs=p*2,fd=p*2+1,bun=p;
if(fs<=k && v[h[fs]]<v[h[bun]])
bun=fs;
if(fd<=k && v[h[fd]]<v[h[bun]])
bun=fd;
if(bun!=p){
schimba(p,bun);
coboara(bun);
}
}
void sterge(int p){
if(p==k)
k--;
else{
schimba(p,k--);
urca(p);
coboara(p);
}
}
int main()
{
f>>n;
while(n--){
int c;
f>>c;
if(c==1){
f>>v[++nrc];
poz[nrc]=nrc;
adauga(nrc);
}
if(c==2){
int x;
f>>x;
sterge(poz[x]);
}
if(c==3)
g<<v[h[1]]<<'\n';
}
return 0;
}