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#include <fstream>
#include <set>
using namespace std;
ifstream f("heapuri.in");
ofstream g("heapuri.out");
int v[200001];
set <int> h;
int n,caz,a,b,j=0;
int main()
{
f>>n;
for (int i=1; i<=n; i++)
{
f>>caz;
if(caz==1)
{
f>>a;
h.insert(a);
v[++j]=a;
}
if(caz==2)
{
f>>b;
h.erase(v[b]);
}
if(caz==3)
{
g<<*h.begin()<<'\n';
}
}
return 0;
}