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#include <fstream>
#include <set>
using namespace std;
set<int>h;
int v[200010];
int p,i,n,x,m;
int main()
{
ifstream fin ("heapuri.in");
ofstream fout ("heapuri.out");
fin>>n;
for(i=1;i<=n;i++)
{
fin>>p;
if(p==1)
{
fin>>x;
h.insert(x);
m++;
v[m]=x;
}
else if(p==2)
{
fin>>x;
h.erase(v[x]);
}
else
{
fout<<*h.begin()<<'\n';
}
}
return 0;
}