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#include <iostream>
#include <fstream>
#include <vector>
#include <set>
using namespace std;
set<int> s;
int h[200000];
int ops,cs;
long nr, k = 0;
void add(int nr){
h[k++] = nr;
s.insert(nr);
}
void del(int poz){
int x = h[poz];
s.erase(x);
}
int main()
{
ifstream fin("heapuri.in");
ofstream fout("heapuri.out");
fin>>ops;
for(int i=1;i<=ops;i++){
fin>>cs;
switch(cs){
case 1:{
fin>>nr;
add(nr);
break;
}
case 2:{
fin>>nr;
del(nr-1);
break;
}
case 3:{
fout<<*s.begin()<<endl;
break;
}
}
}
fin.close();
fout.close();
return 0;
}